Working vehicle

Abstract

A working vehicle (100) is provided comprising a vehicle body (107), a ground engaging propulsion structure (110) to permit movement of the working vehicle over the ground, and a load handling apparatus (113) coupled to the vehicle body and moveable by a movement actuator (118) with respect to the vehicle body. The working vehicle further comprises: a working configuration for performing a work function; and a generating configuration for generating electrical energy with a renewable electric energy generator.

Description

[0001] Working Vehicle

[0002] FIELD

[0003] The present invention relates to a generator attachment for a working vehicle, to a system comprising a generator attachment, and to a working vehicle.

[0004] BACKGROUND

[0005] There are a variety of generators which are known for producing electrical energy. For example, a common type of generator is a diesel generator which uses the power output of an internal combustion engine to produce electrical energy.

[0006] Renewable electric energy generators have become increasingly popular because of a demand to cut emissions. One type of renewable electric energy generator is a wind turbine, which harnesses wind power to generate electricity. Another type of renewable electric energy generator is a solar panel, which harnesses solar energy to generate electricity. One problem associated with renewable electric energy generators is that a large size is typically needed in order to generate a sufficient amount of energy, which makes them difficult to install and / or move. For example, a wind turbine is typically a tall structure in order to capture increased wind energy at higher elevations, and solar panels typically have a wide surface area in order to capture a greater amount of solar energy. In many jurisdictions permanent wind or solar installations may require planning permission or the like, which can be time-consuming and costly, or simply not possible, to obtain.

[0007] Furthermore, renewable sources of power (e.g., wind and solar energy) typically fluctuate spatiotemporally, and so the amount of power which can be generated with a renewable electric energy generator also fluctuates. Therefore, where a reliable power source is required, non-renewable generators (e.g., diesel generators) may be favoured, resulting in higher emissions.

[0008] The present invention seeks to overcome, or at least mitigate, one or more problems of the prior art.

[0009] SUMMARY

[0010] An aspect of the teachings provides a working vehicle comprising a vehicle body, a ground engaging propulsion structure to permit movement of the vehicle over the ground, and a load handling apparatus coupled to the vehicle body and moveable by a movement actuator with respect to the vehicle body. The working vehicle may further comprise a working configuration for performing a work function. The working vehicle may further comprise a generating configuration for generating electrical energy with a renewable electric energy generator.

[0011] Such a working vehicle has dual functionality. In other words, the working vehicle can also generate renewable electrical energy in addition to typical working operations. Further, because the working vehicle has a ground engaging propulsion structure to permit movement of the vehicle over the ground (e.g., wheels and / or tracks), this provides a mobile renewable energy generating capability.

[0012] Having a renewable electric energy generator (e.g., a wind turbine or solar panel) allows electrical energy to be produced with reduced emissions (e.g., in comparison to diesel generators or other non-renewable generators). Furthermore, it will be understood that the distribution of renewable energy (e.g., wind and solar energy) typically fluctuates spatiotemporally, and so the ability to provide a mobile generator which can be moved to renewable energy "hotspots" is particularly beneficial for renewable electric energy generators.

[0013] A further benefit of such a working vehicle is that it allows a rapid deployment of a renewable electric energy generator at a given location (e.g., by simply driving the working vehicle in the generating configuration to said location). There is also no need to apply for planning permission, which can be a time-consuming and complex process for static renewable electric energy generators such as wind turbines or solar panels, but which does not apply to vehicles. Rapid deployment may be particularly useful on construction and / or agricultural sites, where there may be a need for power at a particular location on a temporary basis only.

[0014] Optionally, the renewable electric energy generator is coupled to the load handling apparatus when the working vehicle is in the generating configuration and a work implement is coupled to the load handling apparatus when the working vehicle is in the working configuration.

[0015] Coupling the renewable electric energy generator to the load handling apparatus (e.g., rather than to the vehicle body) provides allows the load handling apparatus to be used to move the renewable electric energy generator, which may be useful for optimising generation. For example, where the renewable electric energy generator is a wind turbine, the wind turbine can be raised by the load handling apparatus to capture stronger winds at higher elevations. As another example, where the renewable electric energy generator is a solar panel, the solar panel can be pivoted by the load handling apparatus in order to face the sun.

[0016] Optionally, the renewable electric energy generator comprises a wind turbine.

[0017] It will be understood that the working vehicle may be used in the working configuration during the day and in the generating configuration overnight, when no work is being carried out. Therefore, having a wind turbine may be particularly beneficial because wind if often present overnight (e.g., in contrast to other renewable power sources such as solar energy).

[0018] Optionally, the wind turbine comprises a plurality of turbine blades (e.g., three or more turbine blades).

[0019] Optionally, the wind turbine comprises a rotor diameter defined by the turbine blades, wherein the rotor diameter is in the range of 1 to 3 m, optionally 1.4 to 2.5 m, optionally 1.6 to 2 m.

[0020] Optionally, the wind turbine comprises a horizontal-axis turbine or a vertical-axis turbine.

[0021] Optionally, the wind turbine comprises a three-phase AC output.

[0022] Optionally, the wind turbine comprises a maximum power output in the range of 0.2 to 5 kW, optionally 0.5 to 2 kW, optionally 0.7 to 1.5 kW, optionally 0.8 to 1.2 kW.

[0023] Such a wind turbine output may allow a typical-sized working vehicle battery to be charged in around 10 hours (e.g., overnight).

[0024] Optionally, the wind turbine comprises a start-up wind speed in the range of 2 to 5 m / s. It will be understood that the term "start-up wind speed" refers to the wind speed required for the wind turbine to begin generating power.

[0025] Optionally, the wind turbine comprises a rated wind speed in the range of 5 to 20 m / s. It will be understood that the term "rated wind speed" refers to the wind speed at which the wind turbine produces its maximum power. Optionally, the wind turbine comprises a survival wind speed in the range of 25 to 100 m / s. In other words, the wind turbine is designed to survive wind speeds in this range without incurring damage.

[0026] Optionally, the renewable electric energy generator comprises a solar panel.

[0027] Optionally, the renewable electric energy generator comprises a foldable solar panel array. In this way a solar panel array can be provided with an unfolded size that would be too large to move easily with the working vehicle (to increase solar power generation), and a folded size which is more compact (for easier transport using the working vehicle).

[0028] Optionally, the foldable solar panel array is configured to be actuated using an auxiliary hydraulic service of the working vehicle. In this way, the solar panel array can be folded and unfolded in a controlled manner without requiring any manual lifting.

[0029] Optionally, the generating configuration is defined by an electrical connection between the renewable electric energy generator and an electric energy storage device and / or an electricity network.

[0030] In this way, power generated by the renewable electric energy generator can be stored and / or used by one or more electrical appliances connected to the electricity network.

[0031] Optionally, the working vehicle further comprises a control system configured to determine the configuration of the working vehicle using one or more sensors and / or one or more user inputs.

[0032] Such a control system allows the working vehicle to be controlled appropriately depending on whether it is determined to be in the working configuration or the generating configuration.

[0033] Optionally, the control system is configured to permit or inhibit operations of the working vehicle depending on the determined configuration of the working vehicle.

[0034] Permitting or inhibiting operations of the working vehicle depending on the determined configuration ensures that the working vehicle does not carry out inappropriate operations in a particular configuration. For example, in the generating configuration the ground engaging propulsion arrangement may be disabled. Optionally, the control system is configured to indicate the determined configuration of the working machine (e.g. on a visible or audible indicator).

[0035] Indicating the determined configuration allows an operator to determine the current state of the working vehicle.

[0036] Optionally, the one or more user inputs comprise a working configuration selection input and a generating configuration selection input.

[0037] Such working and generating configuration selection inputs allow a user to specify when they want the working vehicle to generate electricity or perform a working operation.

[0038] Optionally, when the working or generating configuration selection input is selected, the control system is configured to use the one or more sensors to verify that the working vehicle is in, or can be put into, the selected configuration.

[0039] Using the one or more sensors to verify that the working vehicle is in, or can be put into, the selected configuration inhibits accidental selection of an incorrect configuration.

[0040] Optionally, the one or more sensors are configured to provide one or more signals indicative of: the presence of an operator on the working vehicle; an operating state of an engine of the working vehicle; an operating state of a hydraulic system of the working vehicle; and / or an operating state of an electrical system of the working vehicle.

[0041] Optionally, the control system is configured to determine that the working vehicle is in, or can be put into, the working configuration when the one or more signals indicate that an operator is present on the working vehicle and / or an engine of the working vehicle is in operation, and / or a hydraulic system of the working vehicle is in operation, and / or an electrical system of the working vehicle is in operation.

[0042] Optionally, the control system is configured to determine that the working vehicle is in, or can be put into, the generating configuration when the one or more signals indicate that an engine of the working vehicle is not operation, and / or a hydraulic system of the working vehicle is not in operation, and / or an electrical system of the working vehicle is not in operation.

[0043] It will be understood that the working and / or generating configurations may be defined by multiple factors. For example, the generating configuration may be defined by presence of a renewable electric energy generator, shutdown of an engine, and setting of a generating configuration selection input.

[0044] It will be understood that the working vehicle may have one or more intermediate configurations. For example, when transporting or moving the renewable electric energy generator, the working vehicle may be considered to be in a "generator transporting configuration".

[0045] Optionally, the working vehicle is a telescopic handler in which the load handling apparatus comprises a telescopic working arm.

[0046] Such a working vehicle typically has a work implement carriage for easy interchanging of components, which is useful for attaching a renewable electric energy generator in order to provide a generating configuration. Further, telescopic handlers are often used to elevate objects and materials, which can be useful for electricity generation (e.g., to elevate a wind turbine in order to generate more power from higher wind speeds, or to elevate a solar panel in order to generate more power by avoiding shaded areas).

[0047] Telescopic working arms can be used to elevate objects and materials, which can be useful for electricity generation (e.g., to elevate a wind turbine in order to generate more power from higher wind speeds, or to elevate a solar panel in order to generate more power by avoiding shaded areas).

[0048] Optionally, in the generating configuration, the working vehicle further comprises an electric energy storage device for storing electrical energy generated by the renewable electric energy generator.

[0049] Having such an electric energy storage device allows electrical energy to be stored for later use. Further, the electric energy storage device being part of the working vehicle in the generating configuration mitigates the need for electrical connections to standalone electric energy storage devices and / or electricity networks, which may facilitate a more rapid deployment of the working vehicle in the generating configuration.

[0050] Optionally, the electric energy storage device is onboard the working vehicle in both the working and generating configurations.

[0051] Having an electric energy storage device which is onboard the working vehicle in both configurations allows power generated by the renewable electric energy to be used to power future operations of the working vehicle and / or other electrical devices in proximity to the working vehicle when the working vehicle is not in the generating configuration.

[0052] Optionally, the at least one electric energy storage device is mounted to the vehicle body.

[0053] Optionally, the working vehicle is configured to use energy stored in the electric energy storage device to power the ground engaging propulsion structure and / or movement actuator.

[0054] Optionally, the electric energy storage device is mounted to the load handling apparatus with the renewable electric energy generator.

[0055] Having an electric energy storage device which is mounted to the load handling apparatus with the renewable electric energy generator allows the renewable electric energy generator and electric energy storage device to be moved simultaneously by a working vehicle. In other words, this provides a self-contained power renewable electric energy generating and storing unit.

[0056] Optionally, the working vehicle further comprises a rectifier for converting AC electrical energy generated by the electric energy generator to DC electrical energy for storing in the electric energy storage device, and / or an inverter for converting DC electrical energy stored in the electric energy storage device to AC electrical energy for use by an AC electric device. Optionally, the rectifier and / or inverter is mounted to the load handling apparatus with the renewable electric energy generator.

[0057] Having a rectifier allows AC electrical energy (e.g., AC electrical energy generated by a typical wind turbine) to be stored in a DC electric energy storage device (e.g., a battery).

[0058] Having an inverter allows DC electrical energy (e.g., DC electrical energy generated by a solar panel) to be used by an AC electric device (e.g., a motor, power tool, etc.).

[0059] A further aspect of the teachings provides a system comprising a working vehicle as disclosed herein and at least one independent electric energy storage module for storing electrical energy generated by the renewable electric energy generator.

[0060] Such a system allows electrical energy generated by the working vehicle in the generating configuration to be stored in the independent electric energy storage module (e.g., battery, capacitor, or other suitable electrical energy storage device) for use at an appropriate time. For example, electrical energy generated overnight when a worksite is not operational can be used during the day to power work.

[0061] Such an independent electric energy storage module can be positioned at any suitable location where there is an electric power demand, regardless of where the renewable electric energy generator and associated working vehicle are required. For example, once the independent electric energy storage module has been charged, it can be left at a location requiring power, while the renewable electric energy generator and / or associated working vehicle can be moved elsewhere.

[0062] Optionally, the system comprises a control system and a vehicle electric energy storage device which is onboard the working vehicle in both the working and generating configurations, wherein the control system is configured to direct electrical energy generated by the renewable electric energy generator to the vehicle electric energy storage device until the vehicle electric energy storage device is fully charged, and then to direct electrical energy generated by the renewable electric energy generator to the independent electric energy storage module after the vehicle electric energy storage device is fully charged.

[0063] In this way, the control system prioritises charging of the working vehicle to allow future use of the working vehicle (e.g., the next day), while storing any surplus power in the independent electric energy storage module (e.g., for powering work tools on a work site).

[0064] Alternatively, the control system may be configured to charge the independent electric energy storage module first. This may be useful in systems where the working vehicle is a hybrid working vehicle with an alternative source of power (e.g., an internal combustion engine) but the independent electric energy storage module is the only source of power for other applications (e.g., work tools on a remote work site).

[0065] Optionally, the independent electric energy storage module comprises a rectifier for converting AC electrical energy generated by the electric energy generator to DC electrical energy for storing in the independent electric energy storage module, and / or an inverter for converting DC electrical energy stored in the independent electric energy storage module to AC electrical energy for use by an AC electric device.

[0066] Having a rectifier allows AC electrical energy (e.g., AC electrical energy generated by a typical wind turbine) to be stored in a DC electric energy storage device (e.g., a battery). Having an inverter allows stored DC electrical energy (e.g., DC electrical energy stored in a battery) to be used by an AC electric device (e.g., a motor, power tool, etc.).

[0067] A further aspect of the teachings provides a system comprising a plurality of working vehicles as disclosed herein. The plurality of working vehicles may be co-located on the same site.

[0068] Such a system may be particularly useful at rental yards, or other storage facilities such as those used to store a large number of working vehicles during transportation (e.g., parked up near a ferry port). In such storage facilities, it will be understood that the working vehicles may not perform work functions for long periods of time (e.g., overnight in a rental yard, or for longer periods where waiting for long-distance transportation). Therefore, such a plurality of working vehicles can each be put in the generating configuration so that the amount of time in which the working vehicles are completely idle (i.e., providing no useful function) is reduced. Furthermore, this may help to reduce emissions associated with such sites.

[0069] Optionally, the system further comprises an energy distribution system configured to selectively direct electrical energy generated by the respective renewable electric energy generators to one or more electric energy storage devices and / or an electricity grid; optionally, wherein at least one of the electric energy storage devices is onboard one of the working vehicles and / or wherein at least one of the electric energy storage devices is an independent electric energy storage module.

[0070] In this way, the energy distribution system can be used to control what is done with the generated electrical energy. For example, where one of the working vehicles is an electric working vehicle with an electric energy storage device and another of the working vehicles is a diesel-powered working vehicle without an electric energy storage device, the generated electrical energy from both vehicles can be directed to the electric energy storage device of the electric working vehicle to increase the rate of charging. Further, once the electric energy storage device is fully charged, surplus generated electrical energy can then be directed to a further electric energy storage device and / or an electricity grid.

[0071] Optionally, the energy distribution system is configured to assign a priority to each of the one or more electric energy storage devices and / or electricity grid, and to direct generated electrical energy to the one or more electric energy storage devices and / or the electricity grid according to the assigned priority. For example, the energy distribution system may be configured to direct generated electrical energy to the highest priority electric energy storage device until it is fully charged, and then direct generated electrical energy to the next highest priority electric energy storage device until it is fully charged, and so on. When all the electric energy storage devices are fully charged, the energy distribution system may be configured to direct generated electrical energy to the electricity grid.

[0072] Optionally, the energy distribution system comprises one or more priority user inputs configured to set the priorities of the one or more electric energy storage devices and / or electricity grid.

[0073] Having one or more priority user inputs allows a user to select how they want to prioritise charging (e.g., charging a working vehicle which is scheduled for use the next day first).

[0074] Optionally, the energy distribution system comprises a telematics module configured to receive the one or more priority user inputs remotely.

[0075] Having a telematics module allows priority user inputs to be received remotely. The telematics module may comprise a suitable microprocessor controller and utilise a suitable wireless mobile telecoms protocol such as a 3G, 4G or 5G protocol as is well known in the art.

[0076] A further aspect of the teachings provides a method of operating a working vehicle comprising a vehicle body, a ground engaging propulsion structure to permit movement of the vehicle over the ground, and a load handling apparatus coupled to the vehicle body and moveable by a movement actuator with respect to the vehicle body. The method may comprise using the working vehicle in a generating configuration by: coupling a renewable electric energy generator to the load handling apparatus; and using the renewable electric energy generator to generate electrical energy during downtime of the working vehicle.

[0077] Since working vehicles are mobile, such a method provides a mobile generating capability.

[0078] Using a renewable electric energy generator (e.g., a wind turbine or solar panel) in the method allows electrical energy to be produced with reduced emissions (e.g., in comparison to diesel generators or other non-renewable generators). Furthermore, it will be understood that the distribution of renewable energy (e.g., wind and solar energy) typically fluctuates spatiotemporally, and so the ability to provide a mobile generator which can be moved to renewable energy "hotspots" is particularly beneficial for renewable electric energy generators.

[0079] A further benefit of such a method is that it allows a rapid deployment of a renewable electric energy generator at a given location (e.g., by simply driving the working vehicle in the generating configuration to said location). There is also no need to apply for planning permission, which can be a time-consuming and complex process for static renewable electric energy generators such as wind turbines or solar panels, but which does not apply to vehicles. Rapid deployment may be particularly useful on construction and / or agricultural sites, where there may be a need for power at a particular location on a temporary basis only.

[0080] Optionally, the method further comprises using the working vehicle in a working configuration by: coupling a work implement to the load handling apparatus; and operating the working vehicle to carry out a work function using the work implement.

[0081] In this way, such a method provides a working vehicle with dual functionality. In other words, the working vehicle can carry out typical working operations as well as generating electrical energy.

[0082] Optionally, the step of using the working vehicle in the working configuration is carried out prior to the step of using the working vehicle in the generating configuration. Optionally, the method further comprises de-coupling the work implement from the load handling apparatus after using the working vehicle in the working configuration and prior to using the working vehicle in the generating configuration.

[0083] Optionally, the step of using the working vehicle in the working configuration is carried out after the step of using the working vehicle in the generating configuration. Optionally, the method further comprises de-coupling the renewable electric energy generator from the load handling apparatus after using the working vehicle in the generating configuration and prior to using the working vehicle in the working configuration.

[0084] In other words, the method optionally comprises switching between the working and generating configurations one or more times.

[0085] Optionally, the step of using the working vehicle in the generating configuration further comprises moving the working vehicle and / or renewable electric energy generator to a location on the off-highway site prior to using the renewable electric energy generator to generate electrical energy, in order to increase the amount of electrical energy generated by the renewable electric energy generator.

[0086] Such a method provides increased power generation.

[0087] Optionally, the renewable electric energy generator comprises a wind turbine, and the method comprises raising the wind turbine with the load handling apparatus.

[0088] It will be understood that wind turbines typically generate more energy at higher elevations where the wind is not obscured by buildings, vehicles, trees etc. Therefore, raising the wind turbine with the load handling apparatus may lead to increased electrical energy generation.

[0089] Optionally, the electric energy generator comprises a solar panel, and wherein the method comprises moving the solar panel to face the sun.

[0090] It will be understood that solar panels generate more energy when facing the sun, and so this may lead to increased electrical energy generation.

[0091] Optionally, the step of using the working vehicle in the generating configuration comprises parking the working vehicle prior to using the renewable electric energy generator to generate electrical energy.

[0092] Such a method may increase safety and reduce the risk of damage to the renewable electric energy generator by avoiding moving the working vehicle when operating the renewable electric energy generator.

[0093] Optionally, the step of using the working vehicle in the generating configuration comprises turning off a propulsion system and / or load handling actuation system of the working vehicle prior to using the renewable electric energy generator to generate electrical energy.

[0094] Such a method may increase safety and reduce the risk of damage to the renewable electric energy generator by avoiding moving the working vehicle or the load handling apparatus when operating the renewable electric energy generator.

[0095] Optionally, turning off the propulsion system and / or load handling actuation system comprises turning a switch with a key and / or pressing a button. Optionally, the step of using the working vehicle in the generating configuration comprises selecting a generating configuration selection input prior to using the renewable electric energy generator 16 to generate electrical energy.

[0096] This allows a user to specify when they want the working vehicle to generate electricity.

[0097] Optionally, the step of using the working vehicle in the working configuration comprises selecting a working configuration selection input.

[0098] This allows a user to specify when they want the working vehicle to perform a working operation.

[0099] Optionally, the step of using the working vehicle in the generating configuration comprises storing the generated electrical energy in an electric energy storage device.

[0100] In this way, the generated electrical energy can be stored.

[0101] Optionally, the step of using the working vehicle in the generating configuration comprises connecting the renewable electric energy generator to an electric energy storage device prior to storing the generated electrical energy in said electric energy storage device.

[0102] Optionally, the electric energy storage device is onboard the working vehicle or the electric energy storage device is an independent electric energy storage module.

[0103] Optionally, the step of using the working vehicle in the generating configuration comprises supplying the generated electrical energy to an electricity grid.

[0104] In this way, the generated electrical energy can be used by electrical devices connected to the grid.

[0105] Optionally, wherein the step of using the working vehicle in the generating configuration comprises connecting the renewable electric energy generator to an electricity grid prior to supplying said generated electrical energy to the electricity grid.

[0106] Optionally, the step of using the working vehicle in the generating configuration comprises using the generated electrical energy to power one or more electrical devices. In this way, the generated electrical energy can be used by one or more electrical devices.

[0107] Optionally, the step of using the working vehicle in the generating configuration comprises connecting the renewable electric energy generator to one or more electrical devices prior to directing said generated electrical energy to the one or more electrical devices.

[0108] In some embodiments, the renewable electric energy generator is permanently coupled to a co-located electric energy storage device. In such embodiments, the step of connecting the renewable electric energy generator to the electric energy storage device may be omitted.

[0109] Optionally, the method comprises directing electrical energy generated by the renewable electric energy generator to a vehicle electric energy storage device onboard the working vehicle until the vehicle electric energy storage device is fully charged, and then directing electrical energy generated by the renewable electric energy generator to an independent electric energy storage module and / or an electricity grid after the vehicle electric energy storage device is fully charged.

[0110] In this way, the method prioritises charging of the working vehicle to allow future use of the working vehicle (e.g., the next day), while storing any surplus power in the independent electric energy storage module (e.g., for powering work tools on a work site).

[0111] Alternatively, the method may be configured to charge the independent electric energy storage module first. This may be useful in systems where the working vehicle is a hybrid working vehicle with an alternative source of power (e.g., an internal combustion engine) but the independent electric energy storage module is the only source of power for other applications (e.g., work tools on a remote work site).

[0112] In some embodiments, the independent electric energy storage module is a vehicle electric energy storage device onboard a different working vehicle.

[0113] Optionally, the method comprises selecting a type of renewable electric energy generator for coupling to the load handling apparatus in dependence of one or more weather conditions.

[0114] A further aspect of the teachings provides a method of operating a plurality of working vehicles each comprising a vehicle body, a ground engaging propulsion structure to permit movement of the vehicle over the ground, and a load handling apparatus coupled to the vehicle body and moveable by a movement actuator with respect to the vehicle body. The method may comprise operating each working vehicle using a method as disclosed herein.

[0115] Such a method may be particularly useful for working vehicle rental yards, or other storage facilities such as those used to store a large number of working vehicles during transportation (e.g., parked up near a ferry port). In such storage facilities, it will be understood that the working vehicles may not perform work functions for long periods of time (e.g., overnight in a rental yard, or for longer periods where waiting for long-distance transportation). Therefore, by using the working vehicles in a generating configuration, the amount of time in which the working vehicles are completely idle (i.e., providing no useful function) is reduced. Furthermore, this may help to reduce emissions associated with such sites.

[0116] Optionally, the method comprises connecting the renewable electric energy generator of each working vehicle to an energy distribution system, and using the energy distribution system to direct generated electrical energy to one or more electric energy storage devices and / or an electricity grid.

[0117] In this way, the energy distribution system can be used to control what is done with the generated electrical energy. For example, where one of the working vehicles is an electric working vehicle with an electric energy storage device and another of the working vehicles is a diesel-powered working vehicle without an electric energy storage device, the generated electrical energy from both vehicles can be directed to the electric energy storage device of the electric working vehicle to increase the rate of charging. Further, once the electric energy storage device is fully charged, surplus generated electrical energy can then be directed to a further electric energy storage device and / or an electricity grid.

[0118] Optionally, at least one of the electric energy storage devices is onboard one of the working vehicles and / or at least one of the electric energy storage devices is an independent electric energy storage module.

[0119] Optionally, the method comprises assigning a priority to each of the one or more electric energy storage devices and / or electricity grid, and using the energy distribution system to direct generated electrical energy to the one or more electric energy storage devices and / or the electricity grid according to the assigned priority. For example, the method may direct generated electrical energy to the highest priority electrical energy storage device until it is fully charged, and then directing generated electrical energy to the next highest priority electrical storage device until it is fully charged, and so on. When all the electric energy storage devices are fully charged, the method may direct generated electrical energy to the electricity grid.

[0120] Optionally, assigning a priority to the one or more electric energy storage devices and / or electricity grid comprises receiving one or more priority user inputs, optionally, via a telematics module.

[0121] Receiving one or more priority user inputs allows a user to select how they want to prioritise charging (e.g., charging a working vehicle which is scheduled for use the next day first). Receiving the one or more priority user inputs via a telematics module allows this to be done remotely. Such a telematics module may comprise a suitable microprocessor controller and utilise a suitable wireless mobile telecoms protocol such as a 3G, 4G or 5G protocol as is well known in the art.

[0122] A further aspect of the teachings provides a generator attachment for a working vehicle. The generator attachment may comprise: a body having a connection arrangement; and a renewable electric energy generator coupled to the body. The connection arrangement may be configured for coupling with a work implement carriage situated at the end of a load handling apparatus of a working vehicle.

[0123] Having a generator attachment with a connection arrangement for coupling to a work implement carriage allows a working vehicle to be used to easily move the electric energy generator to a desired location. For example, it may be desirable to move a renewable electric energy generator to a location which provides increased electrical energy generation (e.g., a windier location or sunnier location), or to a location with a demand for temporary power (e.g., during a particular construction stage on a worksite). In other words, when such a generator attachment is coupled to a suitable working vehicle, a mobile renewable electric energy generator is provided.

[0124] It will be understood that a working implement carriage comprises mounting and / or securing arrangements which allow different implements (e.g., forks, buckets and the like) to be easily interchanged. Therefore, having a connection arrangement which is configured for coupling with a work implement carriage allows the generator attachment to be easily interchanged with one or more work implements, which facilitates regular swapping between generating and working operations (e.g., generating overnight and working during the day).

[0125] Furthermore, such a connection arrangement allows the generator attachment to be easily secured during transport, which provides a safer arrangement than if an electric energy generator was simply resting on or inside an implement (e.g., a bucket or fork) of a working vehicle.

[0126] Having a renewable electric energy generator (e.g., a wind turbine or solar panel) allows electrical energy to be produced with reduced emissions (e.g., in comparison to diesel generators or other non-renewable generators). Furthermore, it will be understood that the distribution of renewable energy (e.g., wind and solar energy) typically fluctuates spatiotemporally, and so the ability to provide a mobile generator which can be moved to renewable energy "hotspots" is particularly beneficial for renewable electric energy generators.

[0127] A further benefit of such a generator attachment is that it allows a rapid deployment of a renewable electric energy generator at a given location (e.g., by simply coupling the generator attachment to a work implement carriage of a working vehicle and then driving the working vehicle to said location). There is also no need to apply for planning permission, which can be a time-consuming and complex process for static renewable electric energy generators such as wind turbines or solar panels, but which does not apply to vehicles. Rapid deployment may be particularly useful on construction and / or agricultural sites, where there may be a need for power at a particular location on a temporary basis only.

[0128] Optionally, the body of the generator attachment comprises a base surface, and wherein the generator attachment is configured to rest stably on a horizontal ground surface when the base surface is positioned on said horizontal ground surface.

[0129] Such a configuration facilitates easy coupling of the generator attachment to a work implement carriage whilst minimising lifting / moving manually. In other words, the generator attachment can rest on its base surface and a work implement carriage can be driven up to the connection arrangement in order to couple with the generator attachment. Similarly, this configuration reduces the chances of toppling over during de-coupling of the generator attachment and storage on a ground surface, which reduces the changes of damage to the generator attachment or injuries to persons in the vicinity of the generator attachment. Optionally, the connection arrangement is fixedly attached to a base of the body of the generator attachment.

[0130] By having the connection arrangement fixedly attached to the base of the body (e.g., welded, bolted, formed as a single piece, etc.), the generator attachment is provided as a single unit, which facilitates a secure connection to a work implement carriage.

[0131] Optionally, the connection arrangement is part of a separate component configured to be coupled to a base of the body of the generator attachment.

[0132] For example, the connection arrangement may be part of a work implement which is attachable to the base of the body of the generator attachment. For example, the connection arrangement may be part of a fork comprising a pair of prongs which are configured to be received within one or more recesses in or underneath the base of the body of the generator attachment). This may result in quicker coupling / de-coupling of the generator attachment when switching between generating and working configurations of a working vehicle.

[0133] Optionally, at least part of the connection arrangement is elevated relative to a base of the body of the generator attachment, optionally elevated relative to a base of the body of the generator attachment by at least 30 cm, optionally at least 45 cm, optionally at least 60 cm.

[0134] At least part of the connection arrangement being elevated relative to a base of the body of the generator attachment (i.e., spaced apart from the base of the body of the generator attachment in a direction perpendicular to the base of the body of the generator attachment), allows a work implement carriage to be driven up to the connection arrangement, coupled to the connection arrangement at the elevated position, and then placed in abutment or connection with a lower portion of the generator attachment in order to lift the generator attachment with the work implement carriage. In other words, this facilitates a secure coupling with a work implement carriage and easy engagement / disengagement of the connection arrangement.

[0135] Optionally, the connection arrangement extends transverse to the base. The connection arrangement extending transverse (e.g., perpendicular) to the base allows a working implement carriage to be driven up to the connection arrangement from the side, which facilitates easy engagement / disengagement.

[0136] Optionally, the generator attachment comprises one or more upright members extending from a lower end at a base of the body of the generator attachment to an upper end distal the base, wherein at least part of the connection arrangement is coupled to the one or more upright members at a position spaced apart from the lower end (e.g., proximal to the upper end).

[0137] Such a connection arrangement allows a work implement carriage to be driven up to the connection arrangement, coupled to the connection arrangement at the position spaced apart from the lower end, and then placed in abutment or connection with a lower portion of the one or more upright members to lift the generator attachment with the work implement carriage.

[0138] Optionally, the connection arrangement comprises first and second spaced apart connecting arrangements for engaging spaced apart portions of a work implement carriage.

[0139] Such first and second spaced apart connecting arrangements inhibit pivoting (e.g., pivoting about an axis perpendicular or parallel to a plane of the work implement carriage) and improve the robustness of the connection with the work implement carriage. This is particularly beneficial for heavy generator attachments which may be elevated by the work implement carriage.

[0140] Optionally, the connection arrangement comprises left and right connecting arrangements which are spaced apart laterally (i.e., in a direction parallel to a ground surface).

[0141] Optionally, the connection arrangement comprises upper and lower connecting arrangements which are spaced apart vertically (i.e., in a direction transverse to a ground surface). Optionally, wherein the upper connecting arrangement is configured for securing to the work implement carriage and the lower connecting arrangement comprises a surface for abutment against a lower portion of a work implement carriage.

[0142] Optionally, the first and second spaced apart connecting arrangements are spaced apart laterally by at least 60 cm, optionally at least 80 cm, optionally at least 100 cm. Such a spacing provides good stability. Optionally, the first and second spaced apart connecting arrangements are spaced apart vertically by at least 30 cm, optionally at least 45 cm, optionally at least 60 cm. Such a spacing provides good stability.

[0143] Optionally, the connection arrangement comprises a connecting member (e.g., a bar) for engaging a corresponding mounting structure (e.g., a recess) in a work implement carriage, and / or a recess (e.g., an inside of a hook) for receiving a corresponding connecting member (e.g. a bar) of a work implement carriage.

[0144] Such a connecting member and mounting structure / recess arrangement provides a simple means of coupling the generator attachment with a work implement carriage (e.g., by locating the connecting member in the corresponding mounting structure). Furthermore, such a connecting member and mounting structure / recess arrangement can provide a secure arrangement (e.g., when an open portion of the mounting structure / recess is closed by a securing member of the work implement carriage after the connecting member has engaged the mounting structure / recess).

[0145] Optionally, the connection arrangement comprises a pair of left and right horizontal connecting members (e.g., left and right bars) for engaging a corresponding pair of left and right mounting structures (e.g., left and right recesses) of a work implement carriage; and / or wherein the connection arrangement comprises a central horizontal connecting member (e.g., a central bar) for engaging a corresponding central mounting structure (e.g., central recess) of a work implement carriage.

[0146] Such a connection arrangement facilitates a stable and secure coupling and allows the connection arrangement to interface with commercially available work implement carriages.

[0147] Optionally, the connection arrangement comprises a pair of left and right recesses (e.g., each recess being an inside of a respective hook) for receiving a corresponding pair of left and right connecting members (e.g., left and right bars) of a work implement carriage.

[0148] Optionally, the connection arrangement comprises an intermediate component that can be releasably coupled to the body of the generator attachment and to a work implement carriage.

[0149] Optionally, the renewable electric energy generator comprises a wind turbine. It will be understood that wind turbines typically generate more energy at higher elevations where the wind is not obscured by buildings, vehicles, trees etc. Therefore, having a generator attachment with a connection arrangement for coupling with a work implement carriage (which can be elevated by actuation of the associated load handling apparatus) is particularly beneficial for wind turbines.

[0150] Optionally, the wind turbine is coupled to the body of the generator attachment by a mounting structure, such that the wind turbine is elevated relative to the body of the generator attachment.

[0151] Such a mounting structure allows the wind turbine to be elevated above the body of the generator attachment (e.g., above the height of the work implement carriage), which further increases electrical energy generation.

[0152] Optionally, the mounting structure is extendable.

[0153] The mounting structure being extendable allows the wind turbine to be raised when the generator attachment is coupled to a work implement carriage, for increasing electrical energy generation, and lowered when the generator attachment is de-coupled from a work implement carriage (e.g., to lower centre-of-gravity and increase stability when resting on a ground surface).

[0154] Optionally, the mounting structure comprises a tube pole (e.g., a steel tube pole). Optionally the mounting structure comprises a steel tube pole with a cross-sectional diameter in the range of 40 to 60 mm (e.g., approximately 50 mm). Such a mounting structure is widely available (e.g., as tubes used in scaffolding installations) and can be used to mount commercially available wind turbines.

[0155] Optionally, the wind turbine comprises one or more turbine blades, wherein the generator attachment is configured so that the one or more turbine blades are above the ground when the body of the generator attachment is resting on a horizontal ground surface.

[0156] Such a configuration reduces the chance of damage to the one or more turbine blades when the generator attachment is set down and stored on a horizontal ground surface.

[0157] Optionally, the wind turbine comprises a plurality of turbine blades (e.g., three or more turbine blades). Optionally, the wind turbine comprises a rotor diameter defined by the turbine blades, wherein the rotor diameter is in the range of 1 to 3 m, optionally 1.4 to 2.5 m, optionally 1.6 to 2 m.

[0158] Optionally, the wind turbine comprises a horizontal-axis turbine or a vertical-axis turbine.

[0159] Optionally, the wind turbine comprises a three-phase AC output.

[0160] Optionally, the wind turbine comprises a maximum power output in the range of 0.2 to 5 kW, optionally 0.5 to 2 kW, optionally 0.7 to 1.5 kW, optionally 0.8 to 1.2 kW.

[0161] Such a wind turbine output may allow a typical-sized working vehicle battery to be charged in around 10 hours (e.g., overnight).

[0162] Optionally, the wind turbine comprises a start-up wind speed in the range of 2 to 5 m / s. It will be understood that the term "start-up wind speed" refers to the wind speed required for the wind turbine to begin generating power.

[0163] Optionally, the wind turbine comprises a rated wind speed in the range of 5 to 20 m / s. It will be understood that the term "rated wind speed" refers to the wind speed at which the wind turbine produces its maximum power.

[0164] Optionally, the wind turbine comprises a survival wind speed in the range of 25 to 100 m / s. In other words, the wind turbine is designed to survive wind speeds in this range without incurring damage.

[0165] Optionally, the renewable electric energy generator comprises a solar panel.

[0166] Optionally, the renewable electric energy generator comprises a foldable solar panel array. In this way a solar panel array can be provided with an unfolded size that would be too large to move easily with a working vehicle (to increase solar power generation), and a folded size which is more compact (for easier transport using a working vehicle).

[0167] Optionally, the foldable solar panel array is configured to be actuated using an auxiliary hydraulic service of a working vehicle. In this way, the solar panel array can be folded and unfolded in a controlled manner without requiring any manual lifting. Optionally, the generator attachment further comprises a control system configured to determine a property of a renewable energy source for the renewable electric energy generator (e.g., wind speed, wind direction, solar intensity, solar direction).

[0168] Such a control system allows the amount of electrical energy which is or could be generated to be determined.

[0169] Optionally, the control system comprises a sensor for detecting said property of the renewable energy source (e.g., a wind speed / direction sensor, or a solar tracking sensor), and / or a receiver configured to receive said property from an external source (e.g., a weather forecast).

[0170] Optionally, the control system is configured to modify a position, orientation and / or configuration of the renewable electric energy generator in dependence of the determined property of the renewable energy source. Optionally, the control system comprises an actuator configured to move at least a portion of the renewable electric energy generator in dependence of the determined property of the renewable energy source.

[0171] Where the control system is configured to modify a position, orientation and / or configuration of the renewable electric energy generator in dependence of the determined property of the renewable energy source, this allows the amount of electrical energy which can be generated to be increased (e.g., maximised). For example, when the renewable electric energy generator is a wind turbine, the control system may be configured to turn the wind turbine into the wind, to alter the pitch of turbine blades depending on wind speed, etc. Alternatively, when the renewable electric energy generator is a solar panel, the control system may be configured to move the solar panel in order to track the movement of the sun throughout the day (e.g., by altering yaw and pitch angles of the solar panel using one or more actuators).

[0172] Optionally, the control system comprises an indicator configured to indicate the determined property of the renewable energy source. Such an indicator (e.g., an audible or visible indicator) gives an operator an indication of the amount of energy which is or can be generated, which may inform decisions on whether to start / stop generating power, whether to move to a different location, etc.

[0173] Optionally the control system comprises a telematics module to transmit the determined property to a remote location and / or transmit a status of an energy storage module associated with the generator attachment to a remote location and / or permit instructions to be transmitted from the remote location to the generator attachment, to for example cease or commence generating energy or to control which of a plurality of energy storage devices is to be charged by the generator attachment.

[0174] Optionally, the generator attachment further comprises a rectifier for converting electrical energy generated by the renewable electric energy generator into a suitable electric current for storage in an electric energy storage device. Having a rectifier allows AC electrical energy (e.g., AC electrical energy generated by a typical wind turbine) to be stored in a DC electric energy storage device (e.g., a battery).

[0175] Optionally, the generator attachment further comprises an inverter for converting electrical energy generated by the renewable electric energy generator into a suitable electric current for use by an electrical outlet. Having an inverter allows DC electrical energy (e.g., DC electrical energy generated by a solar panel) to be used by an AC electric device (e.g., a motor, power tool, etc.).

[0176] A further aspect of the teachings provides a system comprising a generator attachment as disclosed herein and at least one electric energy storage device for storing electrical energy generated by the renewable electric energy generator.

[0177] Such a system allows electrical energy generated by the electric energy generator to be stored in the at least one electric energy storage device (e.g., battery, capacitor, or other suitable electrical energy storage device) for use at an appropriate time. For example, electrical energy generated overnight when a worksite is not operational can be used during the day to power work.

[0178] Optionally, the system comprises an electric energy storage device which forms at least part of an independent power module.

[0179] Having an electric energy storage device which forms at least part of an independent power module allows the module to be positioned at any suitable location where there is an electric power demand, regardless of where the generator attachment and associated working vehicle are required. For example, once the electric energy storage device has been charged, the independent power module can be left at a location requiring power, while the generator attachment and / or associated working vehicle can be moved elsewhere. Optionally, the system comprises an electric energy storage device which is onboard an electric working vehicle.

[0180] Having an electric energy storage device which is onboard an electric working vehicle allows power generated by the generator attachment when the working vehicle is not performing work functions to be used to power future operations of the working vehicle.

[0181] Optionally, the system comprises an electric energy storage device which is mounted or mountable to the body of the generator attachment.

[0182] Having an electric energy storage device which is mounted or mountable to the body of the generator attachment allows the generator attachment and electric energy storage device to be moved simultaneously by a working vehicle. In other words, this provides a self-contained power generating and storing unit.

[0183] Optionally, the system comprises a first electric energy storage device which is onboard an electric or hybrid working vehicle, a second electric energy storage device which is independent of a working vehicle, and a control system, and wherein the control system is configured to direct electrical energy generated by the generator attachment to the first electric energy storage device until the first electric energy storage device is fully charged, and then to direct electrical energy generated by the generator attachment to the second electric energy storage device after the first electric energy storage device is fully charged.

[0184] In this way, the control system prioritises charging of the electric working vehicle to allow future use of the working vehicle (e.g., the next day), while storing any surplus power in the second electric energy storage device (e.g., for powering work tools on a work site).

[0185] Alternatively, the control system may be configured to charge the second electric energy storage device first. This may be useful in systems where the first electric energy storage device is onboard a hybrid working vehicle with an alternative source of power (e.g., an internal combustion engine) but the second electric energy storage device is the only source of power for other applications (e.g., work tools on a remote work site).

[0186] Optionally, the system further comprises a rectifier for converting AC electrical energy generated by the electric energy generator to DC electrical energy for storing in the electric energy storage device. Having a rectifier allows AC electrical energy (e.g., AC electrical energy generated by a typical wind turbine) to be stored in a DC electric energy storage device (e.g. a battery).

[0187] Optionally, the system further comprises an inverter for converting DC electrical energy stored in the electric energy storage device to AC electrical energy for use by an AC electric device.

[0188] Having an inverter allows DC electrical energy (e.g., DC electrical energy generated by a solar panel) to be used by an AC electric device (e.g. a motor, power tool, etc.).

[0189] Optionally, the system is configured so that the rectifier and / or inverter is mounted or mountable to the generator attachment (e.g., to the electric energy generator and / or the body of the generator attachment).

[0190] Optionally, the rectifier and / or inverter is part of an independent power module comprising the electric energy storage device.

[0191] Optionally, the rectifier and / or inverter is part of a working vehicle.

[0192] A further aspect of the teachings provides a working vehicle comprising a load handling apparatus comprising a distal end having a work implement carriage, and a generator attachment as disclosed herein coupled to the work implement carriage.

[0193] Such a working vehicle provides a portable generator arrangement with the associated benefits outlined above.

[0194] Optionally, the working vehicle is a land-based working vehicle. Optionally, the working vehicle comprises a ground-engaging propulsion arrangement (e.g., including wheels or tracks).

[0195] BRIEF DESCRIPTION OF DRAWINGS

[0196] Embodiments will now be described by way of example only with reference to the accompanying figures, in which:

[0197] Figure 1 is a front view of a generator attachment according to an embodiment;

[0198] Figure 2 is a side view of a system including the generator attachment of Figure 1; Figure 3A is a perspective view of a portion of the connection arrangement of the generator attachments of Figures 1 and 2;

[0199] Figure 3B is a perspective view of an alternative connection arrangement;

[0200] Figure 4 is a side view of a working vehicle in a working configuration, according to an embodiment;

[0201] Figure 5 is a side view of the working vehicle of Figure 4 in a generating configuration comprising the generator attachment of Figures 1 and 2;

[0202] Figure 6 is a front view of a generator attachment according to a further embodiment;

[0203] Figure 7 is a side view of a system including the generator attachment of Figure 6;

[0204] Figure 8 is a side view of the working vehicle of Figure 4 in a generating configuration comprising the generator attachment of Figures 6 and 7;

[0205] Figures 9A and 9B are front views of a generator attachment according to a further embodiment, in unfolded and partially folded conditions respectively; and

[0206] Figure 10 is a top view of a system including a plurality of working vehicles, according to an embodiment.

[0207] DETAILED DESCRIPTION

[0208] In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of various embodiments and the teachings. However, those skilled in the art will understand that: the present teachings may be practiced without these specific details or with known equivalents of these specific details; that the present teachings are not limited to the described embodiments; and, that the present teachings may be practiced in a variety of alternative embodiments. It will also be appreciated that well known methods, procedures, components, and systems may not have been described in detail.

[0209] With reference to Figures 1 and 2, a generator attachment for a working vehicle is indicated at 10. The generator attachment 10 has a body 12 with a connection arrangement 14. The generator attachment 10 also has an electric energy generator 16 coupled to the body 12.

[0210] In the illustrated embodiment, the connection arrangement 14 is configured for coupling with a work implement carriage situated at the end of a load handling apparatus (e.g., a working arm) of a working vehicle. It will be understood that a working implement carriage comprises mounting and / or securing arrangements which allow different implements (e.g., forks, buckets and the like) to be easily interchanged. Therefore, having a connection arrangement 14 which is configured for coupling with a work implement carriage allows the generator attachment 10 to be easily interchanged with one or more work implements, which facilitates regular swapping between generating and working operations (e.g., generating overnight and working during the day). Furthermore, such a connection arrangement 14 allows the generator attachment 10 to be easily secured during transport, which provides a safer arrangement than if an electric energy generator 16 was simply resting on or inside an implement (e.g., a bucket or fork) of a working vehicle.

[0211] As will be described in more detail below, the connection arrangement 14 has first and second spaced apart connecting arrangements for engaging spaced apart portions of a work implement carriage. In particular, the connection arrangement 14 has left and right connecting arrangements 18A, 18B which are spaced apart laterally (i.e., in a direction parallel to a ground surface G. The connection arrangement 14 may also have upper connecting arrangements and lower connecting arrangements which are spaced are spaced apart vertically (i.e., in a direction transverse to the ground surface G. In some embodiments, the upper connecting arrangements are configured for securing to a work implement carriage and the lower connecting arrangements are surfaces for abutment against a lower portion of a work implement carriage (e.g., as illustrated in Figure 2).

[0212] In the embodiments of Figures 1 to 3A, the connection arrangement 14 includes a connecting member in the form of a bar, for engaging a corresponding mounting structure in the form of a recess in a work implement carriage 102. In more detail, the connection arrangement 14 includes a pair of left and right horizontal connecting members 18A, 18B in the form of left and right bars, for engaging a corresponding pair of left and right mounting structures 104A, 104B in the form of left and right recesses of the work implement carriage 102. The connection arrangement 14 further includes a central horizontal connecting member 18C in the form of a central bar, for engaging a corresponding central mounting structure 1040 in the form of a central recess of the work implement carriage 102. In alternative embodiments, the connection arrangement 14 includes a recess for receiving a corresponding connecting member (e.g., a bar) of the work implement carriage 102. In alternative embodiments, the connection arrangement 14 includes a combination of one or more connecting members and recesses.

[0213] In some embodiments, the left and right horizontal connecting members 18A, 18B are spaced apart by at least 60 cm, optionally at least 80cm, optionally at least 100 cm.

[0214] In the arrangement of Figure 3A, the work implement carriage 102 includes one or more movable securing members 106 which can be moved in order to close an open portion of a respective mounting structure 104A, 104B, 104C once the corresponding connecting member 18A, 18B, 18C has been engaged.

[0215] In the illustrated embodiment, at least part of the connection arrangement 14 is elevated relative to a base of the body 12 of the generator attachment 10 (e.g., elevated by at least 30 cm, optionally at least 45 cm, optionally at least 60 cm). In particular, the connection arrangement 14 is coupled to a base of the body 12 of the generator attachment 10 by one or more upright members 20 (e.g., a pair of left and right upright members 20). In more detail, the one or more upright members 20 extend from a lower end at a base of the body 12 of the generator attachment 10 to an upper end distal the base, and the connection arrangement 14 is coupled to the one or more upright members 20 at a position spaced apart from the lower end (e.g., proximal to the upper end). In this way, the connection arrangement 14 is raised relative to a ground surface, which facilitates coupling with known work implement carriages.

[0216] In some embodiments, the connection arrangement 14 includes an intermediate component that can be releasably coupled to the body 12 of the generator attachment 10 and to the work implement carriage 102.

[0217] Figure 3B illustrates an alternative type of connection arrangement 14' for coupling to a work implement carriage 102, which could be used instead of, or in addition to, the connection arrangement 14 of Figures 1 to 3A. The connection arrangement 14' includes a pair of left and right connecting members 18A', 18B' each defining a hook 19A', 19B' which defines a recess 21A', 21B' for engaging a corresponding connecting member (e.g., a bar) on a work implement carriage. For example, such a suitable connecting member 107B' for being engaged by one of the hooks 19B' is illustrated on the work implement carriage 102 of Figure 3A. The left and right connecting members 18A', 18B' of Figure 3B also include apertures 23A', 23B' spaced apart from the hooks 19A', 19B' (e.g., spaced apart from the hooks 19A', 19B' by at least 30 cm, optionally at least 45 cm, optionally at least 60 cm). The apertures 23A', 23B' may be engaged by a securing pin of a work implement carriage after the hooks 19A', 19B' have engaged a corresponding connecting member, in order to secure the connection arrangement 14' to the work implement carriage. For example, such a suitable securing pin 109B' is illustrated on the work implement carriage 102 of Figure 3A. It will be understood that the connection arrangement 14' extends transverse (e.g., perpendicular) to a base of the body 12 of the generator attachment 10.

[0218] The left and right connecting members 18A', 18B' of Figure 3B may in some embodiments be coupled to the upright members 20 (e.g., fixed to or integrally formed with the upright members 20). Alternatively, the left and right connecting members 18A', 18B' of Figure 3B may replace the upright members 20 (e.g., be directly coupled to a base of the body 12 of the generator attachment 10).

[0219] In some embodiments, the left and right connecting members 18A', 18B' are spaced apart laterally by at least 60 cm, optionally at least 80 cm, optionally at least 100 cm.

[0220] The illustrated connection arrangements 14, 14' are suitable for interfacing with known work implement carriages, which allows a standard working vehicle to be used to easily move the electric energy generator 16 to a desired location. In alternative embodiments, any other type of connecting arrangement suitable for interfacing with a work implement carriage is provided. Examples of known interfaces include Q-fit for the present applicant's telehandler machines, ISO couplers and SSL couplers.

[0221] Referring again to Figures 1 and 2, the body 12 of the generator attachment 10 has a base surface 22, and the generator attachment 10 is configured to rest stably on a horizontal ground surface G when the base surface 22 is positioned on said horizontal ground surface G (as illustrated in Figures 1 and 2). This facilitates easy coupling of the generator attachment 10 to a work implement carriage whilst minimising lifting / moving manually. In other words, the generator attachment 10 can rest on its base surface 22 and a work implement carriage can be driven up to the connection arrangement 14 in order to couple with the generator attachment 10. Similarly, this configuration reduces the chances of toppling over during de-coupling of the generator attachment 10 and storage on a ground surface G, which reduces the changes of damage to the generator attachment 10 or injuries to persons in the vicinity of the generator attachment 10. In the illustrated embodiment, the base surface 22 is flat, which facilitates stable resting on the horizontal ground surface G. In other embodiments, the base surface 22 may have a different shape (e.g. consisting of one or more parallel and / or overlapping bars).

[0222] In some embodiments, the body 12 of the generator attachment 10 has a ballast material in order to lower a centre of gravity of the generator attachment 10. In this way, the ballast material reduces the chances of the generator attachment 10 toppling over. The ballast material may include a metallic material, rocks, sand, or any other suitable material. In some embodiments, the body 12 of the generator attachment 10 has a mount or receptacle for receiving ballast material (e.g., a tray for filling with rocks or aggregate). In this way, ballast material can be added when, for example, the generator attachment 10 is to be stored on a ground surface G for a prolonged period. In some embodiments, the body 12 of the generator attachment 10 has a securing formation (e.g., an aperture or loop) for receiving a securing member (e.g., a ground peg, rope, or fastener). This may further reduce the chances of the generator attachment 10 toppling over when stored on a ground surface G.

[0223] In the embodiment of Figures 1 and 2, the electric energy generator 16 is a renewable electric energy generator. This allows electrical energy to be produced with reduced emissions (e.g., in comparison to diesel generators or other non-renewable generators). In particular, the electric energy generator 16 is a wind turbine. It will be understood that wind turbines typically generate more energy at higher elevations where the wind is not obscured by buildings, vehicles, trees etc. Therefore, having a generator attachment 10 with a connection arrangement 14 for coupling with a work implement carriage (which can be elevated by actuation of the working arm) is particularly beneficial when the electric energy generator 16 is a wind turbine.

[0224] In the embodiment of Figures 1 and 2, the wind turbine 16 is a horizontal-axis turbine. In alternative embodiments, the wind turbine 16 is a vertical-axis turbine.

[0225] In the embodiment of Figures 1 and 2, the wind turbine 16 is coupled to the body 12 of the generator attachment 10 by a mounting structure 24, such that the wind turbine 16 is elevated relative to the body 12 of the generator attachment 10.

[0226] In some embodiments, the mounting structure 24 is extendable (e.g., telescopically or foldably), which allows the wind turbine 16 to be raised when the generator attachment 10 is coupled to a work implement carriage, for increasing electrical energy generation, and lowered when the generator attachment 10 is de-coupled from a work implement carriage (e.g., to lower centre-of-gravity and increase stability when resting on a ground surface). In some embodiments, the mounting structure 24 can be extended and retracted by an extension actuator (e.g., a hydraulic actuator which can be coupled to an auxiliary service of a working vehicle).

[0227] In some embodiments, the wind turbine 16 is releasably attached to the mounting structure 24 and / or the mounting structure 24 is releasably attached to the body 12 of the generator attachment 10. In this way, the wind turbine 16 can be removed when it is required to reduce the size, and / or lower a centre of gravity of, the generator attachment 10 (e.g., during transportation or long-term storage). In addition, this may allow replacement of the wind turbine 16 with another type of electric energy generator (e.g., a solar panel). Furthermore, this may facilitate replacement of a damaged or faulty wind turbine 16 without having to replace the entire generator attachment 10.

[0228] In some embodiments, the mounting structure 24 includes a tube pole (e.g., a steel tube pole). For example, the mounting structure may include a steel tube pole with a cross- sectional diameter in the range of 40 to 60 mm (e.g., approximately 50 mm). Such a mounting structure 24 is widely available (e.g., as tubes used in scaffolding installations) and can be used to mount some commercially available wind turbines.

[0229] In the embodiment of Figures 1 and 2, the wind turbine 16 has one or more turbine blades 26. In particular, the wind turbine 16 has three turbine blades 26. However, any suitable number of turbine blades 26 may be provided (e.g., one, two, four, five, six or more turbine blades 26). The generator attachment 10 is configured so that the turbine blades 26 are above the ground when the body 12 of the generator attachment 10 is resting on a horizontal ground surface G. This reduces the chance of damage to the turbine blades 26 when the generator attachment 10 is set down and stored on a horizontal ground surface G.

[0230] The wind turbine 16 has a rotor diameter defined by the turbine blades 26. In some embodiments, the rotor diameter is in the range of 1 to 3 m (e.g., 1.4 to 2.5 m or 1.6 to 2 m).

[0231] In some embodiments, the wind turbine 16 has a three-phase AC output. The wind turbine 16 may also have a maximum power output in the range of 0.2 to 5 kW (e.g., 0.5 to 2 kW, 0.7 to 1.5 kW, or 0.8 to 1.2 kW). Such a wind turbine output may allow a typicalsized working vehicle battery to be charged in around 10 hours (e.g., overnight). In some embodiments, the wind turbine 16 has a start-up wind speed in the range of 2 to 5 m / s. It will be understood that the term "start-up wind speed" refers to the wind speed required for the wind turbine to begin generating power.

[0232] In some embodiments, the wind turbine 16 has a rated wind speed in the range of 5 to 20 m / s. It will be understood that the term "rated wind speed" refers to the wind speed at which the wind turbine produces its maximum power.

[0233] In some embodiments, the wind turbine 16 has a survival wind speed in the range of 25 to 100 m / s. In other words, the wind turbine 16 is designed to survive wind speeds in this range without incurring damage.

[0234] As illustrated schematically in Figure 2, the generator attachment 10 further includes a control system 28 configured to determine a property of a renewable energy source for the wind turbine 16 (e.g., wind speed and / or wind direction). In particular, the control system 28 has a sensor 30 for detecting said property of the renewable energy source (e.g., a wind speed / direction sensor). In alternative embodiments, the control system 28 has a receiver configured to receive said property from an external source (e.g., a weather forecast).

[0235] In the illustrated embodiment, the control system 28 includes an indicator 32 configured to indicate the determined property of the renewable energy source (e.g., wind speed and / or wind direction). Such an indicator 32 (e.g., an audible or visible indicator) gives an operator an indication of the amount of energy which is or can be generated, which may inform decisions on whether to start / stop generating power, whether to move to a different location, etc.

[0236] In the illustrated embodiment, the control system 28 is configured to modify a position, orientation and / or configuration of the wind turbine 16 in dependence of the determined property of the renewable energy source. In particular, the control system 28 includes an actuator 34 configured to move at least a portion of the wind turbine 16 in dependence of the determined property of the renewable energy source. In the illustrated embodiment, the actuator 34 is a rotary actuator which is configured to rotate the wind turbine 16 about a vertical axis. The control system 28 is configured to actuate the rotary actuator 34 in order to turn the wind turbine 16 to face the direction of the wind. This allows the amount of electrical energy which can be generated to be maximised. In some embodiments, the rotary actuator 34 is a hydraulic actuator (e.g., a hydraulic motor) which can be actuated by an auxiliary hydraulic service of a working vehicle. In other embodiments, the rotary actuator 34 is an electric actuator (e.g., a stepper motor) which can be actuated by an electric current (e.g., supplied by the wind turbine 16 or an electric energy storage device).

[0237] Although the rotary actuator 34 is illustrated at a bottom of the mounting structure 24, it will be understood that it could be located at any suitable location (e.g., between an upper end of the mounting structure 24 and the wind turbine 16). Alternatively, the rotary actuator 34 may be omitted and the wind turbine 16 may be configured to rotate passively around a vertical axis by the wind (e.g., by one or more vanes mounted to the wind turbine 16).

[0238] The control system 28 may include other actuators instead of, or in addition to, the rotary actuator 34. For example, the control system 28 may be configured to alter the pitch of the turbine blades 26 depending on a wind speed detected by the sensor 30.

[0239] It will be understood that the control system 28 may include a controller 36 which is configured to send and receive signals from the relevant components in order to achieve the functionality of the control system 28 described above. The controller 36 may be part of the generator attachment 10, part of an independent control module, or part of a working vehicle to which the generator attachment 10 can be attached.

[0240] In the embodiment of Figure 2, the generator attachment 10 is part of a system 38 including at least one electric energy storage device 40A, 40B, 40C for storing electrical energy generated by the electric energy generator 16 (e.g., a battery, capacitor, hydrogen electrolyser coupled to hydrogen storage, or other suitable electrical energy storage device). This allows electrical energy generated by the electric energy generator 16 to be stored in the at least one electric energy storage device 40A, 40B, 40C for use at an appropriate time. For example, electrical energy generated overnight when a worksite is not operational can be used during the day to power work.

[0241] In the illustrated embodiment, the system 38 includes a first electric energy storage device 40A which is mounted to the body 12 of the generator attachment 10 (e.g., on the base 22 of the generator attachment 10). In this way, the generator attachment 10 provides a self-contained power generating and storing unit. In the illustrated embodiment, the system 38 also includes a second electric energy storage device 40B in the form of an independent power module. This allows the module 40B to be positioned at any suitable location where there is an electric power demand, regardless of where the generator attachment 10 and associated working vehicle are required. For example, once the second electric energy storage device 40B has been charged, the independent power module can be left at a location requiring power, while the generator attachment 10 and / or associated working vehicle can be moved elsewhere.

[0242] In some embodiments, the first electric energy storage device 40A is removable from the generator attachment 10. In other words, the first electric energy storage device 40A is also in the form of an independent power module having the advantages of the second electric energy storage device 40B outlined above, but is releasably mountable to the generator attachment 10 for easier transport and / or more compact storage.

[0243] In some embodiments, the system 38 may also include a third electric energy storage device 40C which is onboard an electric working vehicle (as illustrated in Figure 4). In such embodiments, the control system 28 may be configured to direct electrical energy generated by the generator attachment 10 to the third electric energy storage device 40C until the third electric energy storage device 40C is fully charged, and then to direct electrical energy generated by the generator attachment to the first and / or second electric energy storage devices 40A, 40B after the third electric energy storage device 40C is fully charged. In this way, the control system 28 prioritises charging of the electric working vehicle to allow future use of the working vehicle (e.g., the next day), while storing any surplus power in the first and / or second electric energy storage devices 40A, 40B (e.g., for powering work tools on a work site).

[0244] Alternatively, the control system 28 may be configured to charge the first and / or second electric energy storage devices 40A, 40B first. This may be useful in systems where the third electric energy storage device 40C is onboard a hybrid working vehicle with an alternative source of power (e.g., an internal combustion engine) but the first and / or second electric energy storage device 40A, 40B is the only source of power for other applications (e.g., work tools on a remote work site).

[0245] In some embodiments, only one of the first to third electric energy storage devices 40A to 40C, or any other combination of electric energy storage devices 40A, 40B, 40C may be provided. The system 38 further comprises a rectifier 42 for converting electrical energy generated by the wind turbine 16 into a suitable electric current for storage in one or more of the electric energy storage devices 40A to 40C. As illustrated in Figure 2, the rectifier 42 may be part of the generator attachment 10 (i.e., mounted to the generator attachment 10). Alternatively, the rectifier 42 may be part of a separate module (e.g., part of the independent power module including the second electric energy storage device 40B), or onboard an electric working vehicle.

[0246] In some embodiments, the system 38 may include an inverter 44 for converting DC electrical energy stored in the electric energy storage device(s) 40A, 40B, 40C to AC electrical energy for use by an AC electric device. As illustrated in Figure 2, the inverter 44 may be part of the generator attachment 10 (i.e., mounted to the generator attachment 10). Alternatively, the inverter 44 may be part of a separate module (e.g., part of the independent power module including the second electric energy storage device 40B), or part of an electric working vehicle including the third electric energy storage device 40C.

[0247] In some embodiments, the control system 28 has a telematics module 37. The telematics module may comprise a suitable microprocessor controller and utilise a suitable wireless mobile telecoms protocol such as a 3G, 4G or 5G protocol as is well known in the art.

[0248] The telematics module 37 may be configured to transmit the determined property of the renewable energy source to a remote location. For example, the determined property may be transmitted to a logistics centre to estimate how much energy will be generated, and schedule work / generating operations accordingly.

[0249] The telematics module 37 may alternatively or additionally be configured to transmit a status of an energy storage device 40A, 40B, 40C associated with the generator attachment 10 to a remote location. For example, the status may be transmitted to a logistics centre to indicate how much remote power is available, and schedule work / generating operations and / or delivery of particular work vehicles or other power sources accordingly.

[0250] The telematics module 37 may alternatively or additionally be configured to permit instructions to be transmitted from a remote location to the generator attachment 10. For example, instructions may be transmitted to cease or commence generating energy, or to control which of the plurality of energy storage devices 40A, 40B, 40C is to be charged by the generator attachment. Referring now to Figures 4 and 5, a working vehicle is indicated at 100. The working vehicle 100 includes a vehicle body 107 and a ground engaging propulsion structure 110 to permit movement of the working vehicle 100 over the ground. In this embodiment, the ground engaging propulsion arrangement 110 includes wheels 112 on front and rear axles, but in other embodiments tracks may be provided instead. It will be understood that the front and rear axles are coupled to a suitable prime mover (e.g., internal combustion engine and / or electric motor) in order to drive movement of the wheels 112.

[0251] In an embodiment, at least one of the front and rear axles is coupled to the vehicle body 107 by a pivot joint (not shown) located at substantially the centre of the axle such that the axle can rock about a longitudinal axis of the working vehicle 100 - thus, improving stability of the working vehicle when moving across uneven ground. It will be appreciated that this effect can be achieved in other known manners.

[0252] The working vehicle 100 also has a load handling apparatus 113 coupled to the vehicle body 107 and moveable by a movement actuator 118 with respect to the vehicle body 107. The load handling apparatus 113 may be mounted by a mount to the vehicle body 107. In this embodiment, the load handling apparatus 113 has a working arm 114 (e.g., a lifting arm) with a distal end having a work implement carriage 102 coupled thereto. The work implement carriage 102 is pivotable with respect to the distal end of the working arm 114 about an axis B which is transversely arranged. Pivoting of the work implement carriage 102 may be achieved by a further actuator (not shown).

[0253] In this embodiment, the working vehicle 100 also has an operator cabin 108 provided on the vehicle body 107. The working arm 114 is provided adjacent to the operator cabin 108 (i.e., running along a side of the operator cabin 108). In particular, the working arm 114 extends approximately along a longitudinal axis of the vehicle body 107, the operator cabin 108 is provided towards a first side of the longitudinal axis of the vehicle body 107. An engine bay and / or electric energy storage module is provided towards a second side of the longitudinal axis of the vehicle body 107 (i.e., on an opposing side of the working arm 114).

[0254] In the illustrated embodiment, the operator cabin 108 has a fixed angular orientation with respect to the front and rear axles. In alternative embodiments, the vehicle body 107 includes an undercarriage with the front and rear axles (or tracks) and a superstructure which can be slewed relative to the undercarriage. In such alternative embodiments, the operator cabin 108 (and working arm 114) would not have a fixed angular orientation with respect to the front and rear axles. The working vehicle 100 has a working configuration for performing a work function (as illustrated in Figure 4), and a generating configuration for generating electrical energy with a renewable electric energy generator (as illustrated in Figure 5). Such a working vehicle 100 has dual functionality. In other words, the working vehicle 100 can also generate electrical energy in addition to typical working operations. Further, the working vehicle 100 is mobile which thus provides a mobile generating capability in the generator configuration.

[0255] In the working configuration of Figure 4, a fork 116 or other work implement is coupled to the work implement carriage 102.

[0256] In the generating configuration of Figure 5, a renewable electric energy generator (in this embodiment, a wind turbine) is coupled to the load handling apparatus 113. In particular, the generator attachment of Figures 1 and 2 is coupled to the work implement carriage 102 (e.g., in the manner described above with reference to Figure 3A and / or 3B). In other embodiments, the renewable electric energy generator may be couped to the load handling apparatus 113 by alternative means, or may be coupled to the vehicle body 107 instead of the load handling apparatus 113. The renewable electric energy generator may be a wind turbine 16 of the kind described in detail above.

[0257] In the illustrated embodiment, the working vehicle 100 is a telescopic handler and the working arm 114 is pivotable around a horizontal axis A. As mentioned briefly above, the working vehicle 100 has a movement actuator 118 (e.g., a hydraulic or electric linear actuator). The movement actuator 118 is arranged to pivot the working arm 114 about the horizontal axis A in order to raise the work implement carriage 102 at the distal end of the working arm 114 (as illustrated by the dashed lines on Figures 4 and 5). In the illustrated embodiment, the horizontal axis A about which the working arm 114 is pivotable is located between a longitudinal mid-point of the vehicle body 107 and a rear of the vehicle body 107. The working arm 114 extends forwards from the horizontal axis A so that the work implement carriage 102 is provided forward of the vehicle body 107 (at least when the working arm 114 is lowered).

[0258] In the illustrated embodiment, the working arm 114 is a telescopic working arm. In other words, the working arm 114 can be telescopically extended and retracted in order to change a length of the working arm 114, which allows further elevation of the work implement carriage 102. A further actuator (not shown) may be provided to control the telescopic extension of the working arm 114. It will be understood that the working arm 114 has a plurality of sections which are telescopically fitted together so that the longitudinal axes of each section are parallel to each other (e.g., in contrast to an excavator arm which includes a plurality of sections which are pivotable relative to each other).

[0259] In some embodiments, the work implement carriage 102 can be elevated to a maximum height in the range of 3m to 60m, e.g., 4m to 50m, when the working arm 114 is pivoted fully upwards and fully extended.

[0260] In alternative embodiments, the working vehicle 100 is a different type of working vehicle. For example, the working vehicle 100 may be a different type of working vehicle with a telescopic working arm, or with another type of working arm. Typically, such machines may elevate the implement carriage 102 to a height above ground level in excess of 3m, typically more than 4m, and often in a range of 5m to 20m depending upon the size of the machine.

[0261] In some embodiments, the working vehicle 100 is an electric working vehicle (i.e., all of the power for propulsion and working operations is provided by electrical sources). In alternative embodiments, the working vehicle 100 is a hybrid working vehicle (i.e., the working vehicle has an electrical source of power and an alternative source of power, such as an internal combustion engine). In some embodiments, the working vehicle 100 is a traditional internal combustion engine powered working vehicle.

[0262] In some embodiments, the working vehicle 100 includes a control system 120 configured to determine the configuration of the working vehicle 100 using one or more sensors (not shown) and / or user inputs 122.

[0263] In some embodiments, the control system 120 is configured to permit or inhibit operations of the working vehicle 100 depending on the determined configuration of the working vehicle 100. For example, in the generating configuration the ground engaging propulsion arrangement 110 for driving the wheels 112 of the working vehicle 100 may be disabled.

[0264] In some embodiments, the control system 120 is configured to indicate the determined configuration of the working machine 100 (e.g., on a visible or audible indicator 124 in the operator cabin 108 of the working vehicle 100).

[0265] In some embodiments, the one or more user inputs 122 include a working configuration selection input and a generating configuration selection input (e.g., separate buttons, or a switch with a working configuration state and a generating configuration state). In such embodiments, when the working or generating configuration selection input is selected, the control system 120 may be configured to use one or more sensors (not shown) to verify that the working vehicle 100 is in, or can be put into, the selected configuration.

[0266] In some embodiments, the one or more sensors are configured to provide one or more signals indicative of: the presence of an operator on the working vehicle 100; an operating state of an engine of the working vehicle 100; an operating state of a hydraulic system of the working vehicle 100; and / or an operating state of an electrical system of the working vehicle 100.

[0267] In some embodiments, the control system 120 is configured to determine that the working vehicle 100 is in, or can be put into, the working configuration when the one or more signals indicate that an operator is present on the working vehicle 100 and / or an engine of the working vehicle 100 is in operation, and / or a hydraulic system of the working vehicle 100 is in operation, and / or an electrical system of the working vehicle 100 is in operation.

[0268] In some embodiments, the control system 120 is configured to determine that the working vehicle 100 is in, or can be put into, the generating configuration when the one or more signals indicate that an engine of the working vehicle 100 is not operation, and / or a hydraulic system of the working vehicle 100 is not in operation, and / or an electrical system of the working vehicle 100 is not in operation.

[0269] In some embodiments, the generating configuration of the working vehicle 100 is defined by an electrical connection between the renewable electric energy generator and an electric energy storage device and / or an electricity network. The control system 120 may be configured to detect when such an electrical connection has been made.

[0270] It will be understood that the working and / or generating configurations may be defined by multiple factors. For example, the generating configuration may be defined by presence of a renewable electric energy generator, shutdown of an engine, and setting of a generating configuration selection input.

[0271] It will be understood that the working vehicle 100 may have one or more intermediate configurations. For example, when transporting or moving the renewable electric energy generator, the working vehicle 100 may be considered to be in a "generator transporting configuration". In the illustrated embodiment, the working vehicle 100 includes a vehicle electric energy storage device 40C of the kind described above. The vehicle electric energy storage device 40C is onboard the working vehicle 100 in both the working and generating configurations, in particular, by being mounted to the vehicle body 107.

[0272] In some embodiments, the working vehicle 100 is configured to use energy stored in the vehicle electric energy storage device 40C to power the ground engaging propulsion structure 110 and / or movement actuator 118. It will be understood that when the generator attachment 10 of Figures 1 and 2 is mounted to the work implement carriage 102 of the working vehicle 100, the first electric energy storage device 40A which is associated with the generator attachment 10 will be mounted to the load handling apparatus 113 with the renewable electric energy generator 16.

[0273] The working machine 100 may also be part of a system including the independent electric energy storage module 40B described above. In such a system, there may be a control system (e.g., the control system 120 of the working vehicle 100, or the control system 28 of the generator attachment 10) which is configured to direct electrical energy generated by the renewable electric energy generator to the vehicle electric energy storage device 40C until the vehicle electric energy storage device is fully charged, and then to direct electrical energy generated by the renewable electric energy generator to the independent electric energy storage module 40B after the vehicle electric energy storage device 40C is fully charged.

[0274] Alternatively, the control system may be configured to charge the independent electric energy storage module 40B first. This may be useful in systems where the working vehicle 100 is a hybrid working vehicle with an alternative source of power (e.g., an internal combustion engine) but the independent electric energy storage module 40B is the only source of power for other applications (e.g., work tools on a remote work site).

[0275] The working vehicle 100 and or the independent electric energy storage module 40B may include a rectifier and / or inverter of the kind described above.

[0276] It will be understood that the working vehicle 100 of Figures 4 and 5 may be used in a method operating the working vehicle, including using the working vehicle in the generating configuration by coupling a renewable electric energy generator 16 to the load handling apparatus 113 (as illustrated in Figure 5), and using the renewable electric energy generator 16 to generate electrical energy during downtime (i.e., non-working time) of the working vehicle 100, for example overnight. The method may also include using the working vehicle 100 in a working configuration by coupling a work implement 116 to the load handling apparatus 113 (as illustrated in Figure 4) and operating the working vehicle 100 to carry out a work function using the work implement 116.

[0277] The step of using the working vehicle 100 in the working configuration may be carried out prior to the step of using the working vehicle 100 in the generating configuration, and / or vice versa. In other words, the method may involve switching between the working and generating configurations one or more times.

[0278] Since the working vehicle 100 is mobile, the step of using the working vehicle in the generating configuration may include moving the working vehicle 100 (e.g., via wheels 112) and / or the renewable electric energy generator 16 (e.g., via actuation of the working arm 114) to a location on the off-highway site prior to using the renewable electric energy generator to generate electrical energy, to increase the amount of electrical energy generated by the renewable electric energy generator 16. For example, the working vehicle 100 may be driven to an open location away from buildings, trees or other objects and parked there overnight in the generating configuration, which may increase electricity generation due to windier conditions in more open locations. Alternatively, or additionally, the working arm 114 of the working vehicle 100 may be raised and / or extended in order to raise a height of the wind turbine 16 above buildings, trees or other objects, which may increase electricity generation due to windier conditions at higher elevations. Alternatively, where the renewable electric energy generator 16 includes a solar panel, the method may involve moving the solar panel to face the sun (e.g., by pivoting the solar panel using the work implement carriage 102, turning the working vehicle 100, or via any other suitable means).

[0279] The method may involve turning off a propulsion system and / or load handling actuation system of the working vehicle 100 (e.g., by turning a key or pressing a button), prior to using the renewable electric energy generator 16 to generate electrical energy.

[0280] The method may involve selecting a generating configuration selection input prior to using the renewable electric energy generator 16 to generate electrical energy.

[0281] The method may involve selecting a working configuration selection input prior to operating the working vehicle to perform a work function using the work implement 116. The method may involve storing the generated electrical energy in an electric energy storage device 40A, 40B, 40C (e.g., by connecting the renewable electric energy generator 16 to an electric energy storage device 40A, 40B, 40C prior to generating electrical energy). Alternatively, or additionally, the method may involve supplying the generated electrical energy to an electricity grid (e.g., by connecting the renewable electric energy generator 16 to the electricity grid prior to generating electrical energy). Alternatively, or additionally, the method may involve using the generated electrical energy to power one or more electrical devices (e.g., by connecting the renewable electric energy generator 16 to one or more electrical devices prior to generating electrical energy).

[0282] Referring now to Figures 6 and 7, a generator attachment 210 according to a further embodiment is illustrated. Features common to the generator attachment 10 of Figures 1 and 2 will be given the prefix "2", and only differences will be discussed in detail.

[0283] The generator attachment 210 has a body 212 and connection arrangement 214 of the kind illustrated in Figures 1 and 2 and described above in more detail. However, in this embodiment the electric energy generator 216 is an alternative type of renewable electric energy generator. In particular, the renewable electric energy generator 216 is a solar panel. The solar panel 216 is mounted to the body 212 of the generator attachment 210 by a mounting structure 224.

[0284] The generator attachment 210 also has a control system 228 configured to determine a property of a renewable energy source for the solar panel 216 (e.g., solar intensity and / or solar direction). In particular, the control system 228 has a sensor 230 for detecting said property of the renewable energy source (e.g., a solar tracking sensor). In alternative embodiments, the control system 228 has a receiver configured to receive said property from an external source (e.g., a weather forecast or a memory of solar positions over time).

[0285] In the illustrated embodiment, the control system 228 includes an indicator 232 configured to indicate the determined property of the renewable energy source (e.g. solar direction and / or intensity). Such an indicator 232 (e.g. an audible or visible indicator) gives an operator an indication of the amount of energy which is or can be generated, which may inform decisions on whether to start / stop generating power, whether to move to a different location, etc.

[0286] In the illustrated embodiment, the control system 228 is configured to modify a position, orientation and / or configuration of the solar panel 216 in dependence of the determined property of the renewable energy source. In particular, the control system 228 includes one or more actuators 234A, 234B to move at least a portion of the solar panel 216 in dependence of the determined property of the renewable energy source. In the illustrated embodiment, there is a first actuator 234A which is configured to rotate the solar panel 216 about a vertical axis and a second actuator 234B which is configured to pivot the solar panel 216 about a horizontal axis. In this way, the yaw and pitch of the solar panel 216 can be modified in order to track the sun as it moves across the sky.

[0287] The first and second actuators 234A, 234B are illustrated as rotary actuators, but it will be understood that linear actuators may be used to rotate or pivot the solar panel 216 instead (e.g., by locating a linear actuator between the body 212 of the generator attachment 210 and a portion of the solar panel 216 and then subsequently extending or retracting the linear actuator).

[0288] In some embodiments, the first and second actuators 234A, 234B are hydraulic actuators (e.g., hydraulic cylinders and / or motors) which can be actuated by an auxiliary hydraulic service of a working vehicle. In other embodiments, the first and second actuators 234A, 234B are electric actuators (e.g., electric linear actuators and / or stepper motor) which can be actuated by an electric current (e.g., supplied by the solar panel 216 or an electric energy storage device 240A, 240B).

[0289] In other embodiments, one or both of the first and second actuators 234A, 234B may be omitted. For example, when the generator attachment 210 is coupled to a work implement carriage 102, the pitch of the solar panel 216 may be controlled by pivoting the work implement carriage 102 using one or more actuators of the working vehicle. Similarly, yaw of the solar panel 216 may be controlled by moving a working arm of a working vehicle (e.g., by slewing the working arm on a slewed working vehicle, or by moving the working vehicle itself using a ground engaging propulsion arrangement).

[0290] In the embodiment of Figure 7, the generator attachment 210 is part of a system 238 including at least one electric energy storage device 240A, 240B, 240C for storing electrical energy generated by the electric energy generator 216 (e.g., a battery, capacitor, or other suitable electrical energy storage device). The system 238 is similar to the system 38 of Figure 2 described above, and so will not be described here in detail.

[0291] Referring now to Figure 8, the working vehicle 100 of Figures 4 and 5 is illustrated in a second generating configuration in which the generator attachment 210 of Figures 6 and 7 is coupled to the work implement carriage 102. It will be understood that the generator attachment 10 of Figures 1 and 2, and the generator attachment of Figures 6 and 7 can be interchanged depending on the weather conditions. For example, when it is sunny but not windy, the generator attachment 210 of Figures 6 and 7 may be used. Alternatively, when it is windy but not sunny (e.g., overnight), the generator attachment 10 of Figures 1 and 2 may be used.

[0292] Referring now to Figures 9A and 9B, a generator attachment 310 according to a further embodiment is illustrated. Features common to the generator attachment 210 of Figures 6 and 7 will be given the prefix "3", and only differences will be discussed in detail.

[0293] The generator attachment 310 has a body 312 and connection arrangement 314 of the kind illustrated in Figures 1 and 2 and described above in more detail. The generator attachment 310 also has a solar panel. However, in this embodiment there is a foldable solar panel array 316 including a central solar panel 316A, a first foldable solar panel 316B and a second foldable solar panel 316C. In this way the solar panel array 316 can be provided with an unfolded size that would be too large to move easily with a working vehicle (to increase solar power generation), and a folded size which is more compact (for easier transport using a working vehicle) and protects the generating surfaces of the solar panels.

[0294] In some embodiments, the foldable solar panel array 316 is configured to be actuated using an auxiliary hydraulic service of a working vehicle. In other words, the first and second foldable solar panels 316B, 316C are configured to be folded and unfolded using an auxiliary hydraulic service of a working vehicle. In this way, the solar panel array 316 can be folded and unfolded in a controlled manner without requiring any manual lifting.

[0295] It will be understood that the generator attachment 310 of Figures 9A and 9B may be interchangeable with the generator attachments 10, 210 of Figures 1, 2, 6 and 7. In other words, the generator attachment 310 can be coupled to the work implement carriage 102 of the working vehicle 100 of Figures 4, 5 and 8, in order to provide a third generating configuration of the working vehicle 100.

[0296] Referring now to Figure 10, a system 438 according to a further embodiment is illustrated. The system 438 has a plurality of working vehicles 100A, 100B, 100C, 100D which are colocated on the same site.

[0297] The first working vehicle 100A is an electric working vehicle of the kind illustrated in Figures 4 and 5 and described above. The first working vehicle 100A is in the generating configuration, in which a renewable electric energy generator 16 is coupled to the load handling apparatus. The first working vehicle 100A has an electric energy storage device 40C which is onboard the working vehicle 100A.

[0298] The second working vehicle 100B is also an electric working vehicle of the kind illustrated in Figures 4 and 5 and described above. However, the second working vehicle 100B is in the working configuration, in which a work implement 116 is coupled to the load handling apparatus. The second working vehicle 100B has an electric energy storage device 40C which is onboard the working vehicle 100B.

[0299] The third working vehicle 100C is similar to the working vehicle illustrated in Figures 4 and 5 and described above, however, the third working vehicle 100C does not have an onboard electric energy storage device (e.g., the working vehicle is powered by an internal combustion engine). The third working vehicle 100A is in the generating configuration, in which a renewable electric energy generator 16 is coupled to the load handling apparatus.

[0300] The fourth working vehicle 100D is similar to the third working vehicle 100C. However, the fourth working vehicle 100D includes an electric energy storage device 40A which is mounted to the load handling apparatus with the renewable electric energy generator 16.

[0301] The system 438 also includes an energy distribution system 446 which is configured to selectively direct electrical energy generated by the respective renewable electric energy generators 16 to one or more electric energy storage devices 40A, 40B, 40C and / or an electricity grid 448. As well as the electric energy storage devices 40A, 40C which are onboard or mounted to the respective working vehicles 100A, 100B, 100D, the system 438 includes an independent electric energy storage module 40B.

[0302] The renewable electric energy generators 16 of the first, third and fourth working vehicles 100A, 100C, 100D are connected to the energy distribution system 446 by respective power cables 450. In this way, generated electrical energy can be transferred from the renewable electric energy generators 16 to the energy distribution system 446.

[0303] The electric energy storage devices 40A, 40B, 40C are connected to the energy distribution system 446 by respective power cables 452. In this way, the energy distribution system 446 can supply electrical energy to the electric energy storage devices 40A, 40B, 40C. The energy distribution system 446 is connected to an electricity grid 448 by a power cable 454. In this way, the energy distribution system 446 can supply electrical energy to the electricity grid 448 and / or vice versa.

[0304] The energy distribution system 446 can be used to control what is done with the generated electrical energy. For example, the generated electrical energy from the third working vehicle 100C (which has no electric energy storage device) can be directed to the electric energy storage devices 40C of the first and / or second working vehicles 100A, 100B to increase the rate of charging. Further, once the electric energy storage devices 40C are fully charged, surplus generated electrical energy can then be directed to a further electric energy storage device (e.g., the independent electric energy storage module 40B and / or the electric energy storage device 40A mounted to the load handling apparatus of the fourth working vehicle 100D) and / or the electricity grid 448.

[0305] In some embodiments, the energy distribution system 446 is configured to assign a priority to each of the electric energy storage devices 40A, 40B, 40C and / or electricity grid 448, and to direct generated electrical energy to the electric energy storage devices 40A, 40B, 40C and / or the electricity grid 448 according to the assigned priority. For example, the energy distribution system 446 may be configured to direct generated electrical energy to the highest priority electric energy storage device 40A, 40B, 40C until it is fully charged, and then direct generated electrical energy to the next highest priority electric energy storage device 40A, 40B, 40C until it is fully charged, and so on. When all the electric energy storage devices 40A, 40B, 40C are fully charged, the energy distribution system 446 may be configured to direct generated electrical energy to the electricity grid 448.

[0306] In some embodiments, the energy distribution system 446 is configured to receive one or more priority user inputs configured to set the priorities of the electric energy storage devices 40A, 40B, 40C and the electricity grid 448. This allows a user to select how they want to prioritise charging or grid supply (e.g., charging a working vehicle 100A, 100B which is scheduled for use the next day first).

[0307] In the illustrated embodiment, the one or more priority user inputs are received from a remote source via a telematics module 437, described in more detail below. This may provide an easier prioritisation when the number of working vehicles in the system 438 is large. Alternatively, the one or more priority user inputs may be physical buttons, switches, touchscreens or similar located on the energy distribution system 446, the renewable electric energy generators 16, the electric energy storage devices 40A, 40B, 40C and / or the working vehicles 100A, 100B, 100C, 100D. In the illustrated embodiment, the energy distribution system 446 has a telematics module 437 which is configured to send information to and / or receive information from a remote location. For example, the telematics module 437 may send: the generating status of each working vehicle 100A, 100B, 100C, 100D; the charge status of each electric energy storage device 40A, 40B, 40C; or any other suitable information. The telematics module 437 may receive: instructions to start / stop generating electrical energy with any of the renewable electric energy generators 16; instructions to direct generated electrical energy to a particular electric energy storage device 40A, 40B, 40C or electricity grid 448 (e.g., by setting of priorities, as will be described below); or any other suitable instruction.

[0308] The telematics module 437 may have a suitable microprocessor controller and utilise a suitable wireless mobile telecoms protocol such as a 3G, 4G or 5G protocol as is well known in the art.

[0309] In alternative embodiments, the energy distribution system 446 is omitted entirely and each renewable electric energy generator 16 is instead connected directly to a particular electric energy storage device 40A, 40B, 40C or electricity grid 448.

[0310] In alternative embodiments, each renewable electric energy generator 16 is coupled to its own energy distribution system 446 which can direct generated electrical energy to either an associated electric energy storage device 40A, 40B, 40C or the electricity grid 448.

[0311] Although not depicted for simplicity, it will be understood that the system 438 may include one or more rectifiers, inverters, or other electrical components for providing suitable functioning of the energy distribution system 446.

[0312] It will be understood that the four working vehicles 100A, 100B, 100C, 100D illustrated in Figure 10 are just an example, and the system 438 could have any suitable number of working vehicles.

[0313] A number of advantages of the embodiments of Figures 1 to 10 will be apparent from the description above. For example, providing a working vehicle with a generating capability can reduce grid energy consumption (i.e., by not having to use electricity from an electricity grid to power or charge an electric working vehicle and / or electrical device). This may help to save on electricity supply costs, whilst also reducing the load on the electrical grid to help supply of electricity for other uses. It may also allow surplus power to be supplied to an electricity grid, which could provide a source of income, as well as providing a source of power for other devices connected to the electricity grid which may increase the capacity and reliability of the grid. The generating capacity may also provide more resilience in the case of grid instability (e.g., when using working vehicles to respond to a natural disaster which affects electricity supply) and / or in remote locations. These benefits may be particularly noticeable when there is a plurality of working vehicles (e.g., at a rental yard or other storage facility) where any reduction in grid consumption, cost benefits and increased resilience are multiplied.

[0314] The one or more embodiments are described above by way of example only and it will be appreciated that the variations are possible without departing from the scope of protection afforded by the appended claims. For example, the renewable electric energy generators 16, 216, 316 of the described embodiments may be combined with each other or replaced by or combined with a non-renewable generator, such as a diesel generator.

[0315] It should also be noted that whilst the appended claims set out particular combinations of features described above, the scope of the present disclosure is not limited to the particular combinations hereafter claimed, but instead extends to encompass any combination of features herein disclosed.

Claims

Claims1. A working vehicle comprising a vehicle body, a ground engaging propulsion structure to permit movement of the vehicle over the ground, and a load handling apparatus coupled to the vehicle body and moveable by a movement actuator with respect to the vehicle body, wherein the working vehicle further comprises: a working configuration for performing a work function; and a generating configuration for generating electrical energy with a renewable electric energy generator.

2. The working vehicle of claim 1, wherein the renewable electric energy generator is coupled to the load handling apparatus when the working vehicle is in the generating configuration and a work implement is coupled to the load handling apparatus when the working vehicle is in the working configuration.

3. The working vehicle of claim 1 or 2, wherein the renewable electric energy generator comprises a wind turbine.

4. The working vehicle of any preceding claim, further comprising a control system configured to determine the configuration of the working vehicle using one or more sensors and / or one or more user inputs; optionally: wherein the control system is configured to permit or inhibit operations of the working vehicle depending on the determined configuration of the working vehicle; and / or wherein the control system is configured to indicate the determined configuration of the working machine (e.g. on a visible or audible indicator).

5. The working vehicle of claim 4, wherein the one or more user inputs comprise a working configuration selection input and a generating configuration selection input; optionally, wherein, when the working or generating configuration selection input is selected, the control system is configured to use the one or more sensors to verify that the working vehicle is in, or can be put into, the selected configuration.

6. The working vehicle of claim 4 or 5, wherein the one or more sensors are configured to provide one or more signals indicative of: the presence of an operator on the working vehicle; an operating state of an engine of the working vehicle; an operating state of a hydraulic system of the working vehicle; and / or an operating state of an electrical system of the working vehicle.

7. The working vehicle of any preceding claim, wherein the working vehicle is a telescopic handler in which the load handling apparatus comprises a telescopic working arm.

8. The working vehicle of any preceding claim wherein, in the generating configuration, the working vehicle further comprises an electric energy storage device for storing electrical energy generated by the renewable electric energy generator.

9. The working vehicle of claim 8, wherein the electric energy storage device is onboard the working vehicle in both the working and generating configurations; optionally: wherein the at least one electric energy storage device is mounted to the vehicle body; and / or wherein the working vehicle is configured to use energy stored in the electric energy storage device to power the ground engaging propulsion structure and / or movement actuator.

10. The working vehicle of claim 8, wherein the electric energy storage device is mounted to the load handling apparatus with the renewable electric energy generator.

11. A system comprising the working vehicle of any preceding claim and at least one independent electric energy storage module for storing electrical energy generated by the renewable electric energy generator.

12. A system comprising a plurality of working vehicles according to any preceding claim, wherein the plurality of working vehicles are co-located on the same site.

13. The system of claim 12, further comprising an energy distribution system configured to selectively direct electrical energy generated by the respective renewable electric energy generators to one or more electric energy storage devices and / or an electricity grid; optionally, wherein at least one of the electric energy storage devices is onboard one of the working vehicles and / or wherein at least one of the electric energy storage devices is an independent electric energy storage module.

14. The system of claim 13, wherein the energy distribution system is configured to assign a priority to each of the one or more electric energy storage devices and / or electricity grid, and to direct generated electrical energy to the one or more electric energy storage devices and / or the electricity grid according to the assigned priority; optionally, wherein the energy distribution system comprises one or more priority user inputsconfigured to set the priorities of the one or more electric energy storage devices and / or electricity grid; optionally, wherein the energy distribution system comprises a telematics module configured to receive the one or more priority user inputs remotely.

15. A method of operating a working vehicle comprising a vehicle body, a ground engaging propulsion structure to permit movement of the vehicle over the ground, and a load handling apparatus coupled to the vehicle body and moveable by a movement actuator with respect to the vehicle body, the method comprising using the working vehicle in a generating configuration by: coupling a renewable electric energy generator to the load handling apparatus; and using the renewable electric energy generator to generate electrical energy during downtime of the working vehicle.

16. The method of claim 15, further comprising using the working vehicle in a working configuration by: coupling a work implement to the load handling apparatus; and operating the working vehicle to carry out a work function using the work implement.

17. The method of claim 16, wherein: the step of using the working vehicle in the working configuration is carried out prior to the step of using the working vehicle in the generating configuration, optionally wherein the method further comprises de-coupling the work implement from the load handling apparatus after using the working vehicle in the working configuration and prior to using the working vehicle in the generating configuration; and / or the step of using the working vehicle in the working configuration is carried out after the step of using the working vehicle in the generating configuration, optionally wherein the method further comprises de-coupling the renewable electric energy generator from the load handling apparatus after using the working vehicle in the generating configuration and prior to using the working vehicle in the working configuration.

18. The method of any of claims 15 to 17, wherein the step of using the working vehicle in the generating configuration further comprises moving the working vehicle and / or renewable electric energy generator to a location on the off-highway site prior to using the renewable electric energy generator to generate electrical energy, in order to increase the amount of electrical energy generated by the renewable electric energy generator.

19. The method of claim 18, wherein the renewable electric energy generator comprises a wind turbine, and wherein the method comprises raising the wind turbine with the load handling apparatus.

20. The method of claim 18 or 19, wherein the electric energy generator comprises a solar panel, and wherein the method comprises moving the solar panel to face the sun.

21. The method of any of claims 15 to 20, wherein the step of using the working vehicle in the generating configuration comprises turning off a propulsion system and / or load handling actuation system of the working vehicle prior to using the renewable electric energy generator to generate electrical energy; optionally, wherein turning off the propulsion system and / or load handling actuation system comprises turning a switch with a key and / or pressing a button.

22. The method of any of claims 15 to 21, wherein the step of using the working vehicle in the generating configuration comprises: storing the generated electrical energy in an electric energy storage device; optionally, wherein the step of using the working vehicle in the generating configuration comprises connecting the renewable electric energy generator to an electric energy storage device prior to storing the generated electrical energy in said electric energy storage device; optionally, wherein the electric energy storage device is onboard the working vehicle or wherein the electric energy storage device is an independent electric energy storage module; and / or supplying the generated electrical energy to an electricity grid; optionally, wherein the step of using the working vehicle in the generating configuration comprises connecting the renewable electric energy generator to an electricity grid prior to supplying said generated electrical energy to the electricity grid; and / or using the generated electrical energy to power one or more electrical devices; optionally, wherein the step of using the working vehicle in the generating configuration comprises connecting the renewable electric energy generator to one or more electrical devices prior to directing said generated electrical energy to the one or more electrical devices.

23. The method of any of claims 15 to 22, wherein the method comprises directing electrical energy generated by the renewable electric energy generator to a vehicle electric energy storage device onboard the working vehicle until the vehicle electric energy storage device is fully charged, and then directing electrical energy generated by the renewableelectric energy generator to an independent electric energy storage module and / or an electricity grid after the vehicle electric energy storage device is fully charged.

24. A method of operating a plurality of working vehicles each comprising a vehicle body, a ground engaging propulsion structure to permit movement of the vehicle over the ground, and a load handling apparatus coupled to the vehicle body and moveable by a movement actuator with respect to the vehicle body, the method comprising operating each working vehicle using the method of any of claims 15 to 23.

25. The method of claim 24, wherein the method comprises connecting the renewable electric energy generator of each working vehicle to an energy distribution system, and using the energy distribution system to direct generated electrical energy to one or more electric energy storage devices and / or an electricity grid; optionally, wherein at least one of the electric energy storage devices is onboard one of the working vehicles and / or wherein at least one of the electric energy storage devices is an independent electric energy storage module.

26. The method of claim 25, wherein the method comprises assigning a priority to each of the one or more electric energy storage devices and / or electricity grid, and using the energy distribution system to direct generated electrical energy to the one or more electric energy storage devices and / or the electricity grid according to the assigned priority; optionally, wherein assigning a priority to the one or more electric energy storage devices and / or electricity grid comprises receiving one or more priority user inputs, optionally, via a telematics module.

27. A generator attachment for a working vehicle, the generator attachment comprising: a body having a connection arrangement; and a renewable electric energy generator coupled to the body; wherein the connection arrangement is configured for coupling with a work implement carriage situated at the end of a load handling apparatus of a working vehicle.

28. The generator attachment of claim 27 , wherein the body of the generator attachment comprises a base surface, and wherein the generator attachment is configured to rest stably on a horizontal ground surface when the base surface is positioned on said horizontal ground surface.

29. The generator attachment of claim 27 or 28, wherein at least part of the connection arrangement is elevated relative to a base of the body of the generator attachment, optionally elevated relative to a base of the body of the generator attachment by at least 30 cm, optionally at least 45 cm, optionally at least 60 cm.

30. The generator attachment of claim 27 , 28 or 29, wherein the connection arrangement comprises first and second spaced apart connecting arrangements for engaging spaced apart portions of a work implement carriage; optionally, wherein the connection arrangement comprises left and right connecting arrangements which are spaced apart laterally (i.e., in a direction parallel to a ground surface); and / or optionally, wherein the connection arrangement comprises upper and lower connecting arrangements which are spaced apart vertically (i.e., in a direction transverse to a ground surface), optionally, wherein the upper connecting arrangement is configured for securing to the work implement carriage and the lower connecting arrangement comprises a surface for abutment against a lower portion of a work implement carriage.

31. The generator attachment of any of claims 27 to 30, wherein the renewable electric energy generator comprises a wind turbine.

32. The generator attachment of claim 31, wherein the wind turbine is coupled to the body of the generator attachment by a mounting structure, such that the wind turbine is elevated relative to the body of the generator attachment; optionally, wherein the mounting structure is extendable.

33. The generator attachment of any of claims 27 to 32, further comprising a control system configured to determine a property of a renewable energy source for the renewable electric energy generator (e.g., wind speed, wind direction, solar intensity, solar direction); optionally: wherein the control system comprises a sensor for detecting said property of the renewable energy source (e.g., a wind speed / direction sensor, or a solar tracking sensor), and / or a receiver configured to receive said property from an external source (e.g., a weather forecast); and / or wherein the control system is configured to modify a position, orientation and / or configuration of the renewable electric energy generator in dependence of the determined property of the renewable energy source, optionally, wherein the control system comprises an actuator configured to move at least a portion of the renewable electric energy generator in dependence of the determined property of the renewable energy source.

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