Electricity billing system, electricity billing program, and electricity billing device

Abstract

To provide a technique that improves the willingness of residents of an apartment house to save electricity.SOLUTION: An electricity charge billing system for an apartment house comprises: a target power calculation unit that calculates a target of reducing power consumption for every predetermined space in the apartment house; a return amount calculation unit that calculates the amount returned to residents of the apartment house based on the reduction target calculated in the target power calculation unit and the amount of power actually consumed; and an electricity charge calculation unit that calculates an electricity charge billed to the residents based on the amount of power actually consumed and the amount of return calculated in the return amount calculation unit.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an electricity billing system, an electricity billing program, and an electricity billing device. [Background technology]

[0002] Power management systems for apartment buildings have been developed (for example, Patent Documents 1-2). In Patent Document 1, an incentive is given to a resident when the power consumption of the dwelling load is equal to or less than a first power amount, and a penalty is imposed on the resident when the power consumption of the dwelling load exceeds a second power amount. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-140268 A [Patent Document 2] JP 2020-68554 A Summary of the Invention [Problem to be solved by the invention]

[0004] For example, if a uniform incentive is given when power consumption falls below a first power amount as in Patent Document 1, it is conceivable that the motivation of the tenants to save power within a range where power consumption is equal to or above the first power amount will decrease. Therefore, there is a possibility that power saving will not be promoted. In this case, it is expected that the reduction in the amount of power purchased by the bulk power receiving business operator that receives power in a lump sum and supplies power to the housing complex will not be promoted, and as a result, it is expected that it will be difficult to promote the reduction of power purchasing costs.

[0005] In one aspect, the present invention has been made in consideration of the above circumstances, and has an object to provide a technique for increasing the motivation of residents of apartment buildings to save electricity. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the present invention employs the following configuration.

[0007] That is, an electricity billing system according to one aspect of the present invention is an electricity billing system for an apartment building, and includes a target power calculation unit that calculates a power consumption reduction target for each specified space in the apartment building, a refund amount calculation unit that calculates a refund amount to be paid to residents of the apartment building based on the reduction target calculated by the target power calculation unit and the actual power consumption, and an electricity fee calculation unit that calculates the electricity fee to be billed to the residents based on the actual power consumption and the refund amount calculated by the refund amount calculation unit.

[0008] Here, the predetermined space includes a common area of ​​an apartment building or a private area of ​​a resident. The predetermined space also includes a building in which a plurality of private areas of a resident are gathered.

[0009] According to this configuration, appropriate reduction targets can be set for each specified space. Furthermore, each resident can receive rebates according to the amount of electricity reduction. This increases each resident's motivation to save electricity, which promotes energy conservation. Furthermore, by having residents work on saving electricity, they will have a deeper understanding of the environment and will become more aware of it. Furthermore, it becomes possible for collective housing bulk electricity purchasers to reduce the total amount of electricity purchased, and thus the amount of electricity purchased.

[0010] In the electricity rate billing system according to the aforementioned aspect, the electricity rate calculation unit may determine the rebate amount according to a degree of contribution to an actual reduction in power consumption.

[0011] Here, the contribution degree of the actual reduction in power consumption includes the ratio of the reduction amount to the sum of the reduction amounts of power consumption actually consumed in each specified space. The contribution degree of the actual reduction in power consumption also includes the ratio of the reduction achievement rate to the sum of the reduction achievement rate of power consumption actually consumed in each specified space. The contribution degree of the actual reduction in power consumption also includes whether the reduction amount of power consumption actually consumed in each specified space has reached the reduction target.

[0012] This configuration can improve the residents' motivation to save electricity. This promotes energy conservation. In addition, by having residents take part in energy conservation, they will have a deeper understanding of the environment and will become more conscious of it. In addition, it will become possible for collective housing bulk electricity consumers to reduce the total amount of electricity purchased and the amount of electricity purchased.

[0013] In the electricity billing system relating to the above-mentioned aspect, the electricity fee calculation unit may, if the actual power consumption falls short of the reduction target, add a fee corresponding to the shortfall to the electricity fee corresponding to the power consumption actually consumed.

[0014] According to this configuration, failure to achieve the power consumption reduction target is suppressed, and power saving is more reliably promoted.

[0015] In the electricity billing system relating to the above-mentioned aspect, the electricity fee calculation unit may calculate the electricity fee without adding a fee corresponding to the shortfall to the electricity fee corresponding to the power consumption actually consumed when the actual power consumption falls short of the reduction target.

[0016] According to this configuration, excessive economic or mental burden placed on residents in order to save electricity is prevented.

[0017] In the electricity billing system relating to the above-mentioned aspect, the target power calculation unit may calculate the reduction target based on at least one of the overall past power consumption of the apartment building, the past power consumption obtained from electricity meters installed in common areas and the tenants' private areas of the apartment building, and the electricity rate plan of the apartment building.

[0018] According to this configuration, it is possible to set an appropriate power consumption reduction target. This increases the willingness of residents to save energy. In addition, failure to achieve the power consumption reduction target is suppressed. This makes it more certain that energy conservation will be promoted.

[0019] The electricity billing system according to the above aspect may further include a display unit that displays the reduction target and the amount of electricity consumed actually.

[0020] According to this configuration, the occupant can check the amount of power actually consumed. Therefore, the amount of power that is insufficient to reach the reduction target can be understood. Therefore, the failure to reach the reduction target for power consumption is suppressed. Therefore, the promotion of power saving is more reliably promoted.

[0021] In addition, an electricity billing system according to one aspect of the present invention may further include a determination unit that determines whether the actual power consumption is lower than a threshold for achieving the reduction target, and a notification unit that notifies the resident that the determination unit has determined that the actual power consumption is lower than the threshold for achieving the reduction target.

[0022] According to this configuration, it is possible to urge a resident who is in danger of not achieving the power consumption reduction target to conserve electricity, thereby preventing the power consumption reduction target from being not achieved.

[0023] In addition, an electricity billing program according to one aspect of the present invention is an electricity billing program for an apartment building, which causes a computer to execute a target power calculation step of calculating a power consumption reduction target for each specified space in the apartment building, a refund calculation step of calculating a refund amount to be paid to residents of the apartment building based on the reduction target calculated in the target power calculation step and the actual power consumption, and an electricity fee calculation step of calculating an electricity fee to be billed to the residents based on the actual power consumption and the refund amount calculated in the refund calculation step.

[0024] An electricity billing device according to one aspect of the present invention is an electricity billing device for an apartment building, and includes a target power calculation unit that calculates a power consumption reduction target for each specified space in the apartment building, a refund amount calculation unit that calculates a refund amount to be paid to residents of the apartment building based on the reduction target calculated by the target power calculation unit and the actual power consumption, and an electricity fee calculation unit that calculates an electricity fee to be billed to the residents based on the actual power consumption and the refund amount calculated by the refund amount calculation unit. Effect of the Invention

[0025] According to the present invention, it is possible to provide a technique for improving the motivation of residents of apartment buildings to save electricity. [Brief description of the drawings]

[0026] [Figure 1] FIG. 1 illustrates an overview of an application example of an electricity billing system according to an embodiment. [Diagram 2] FIG. 2 illustrates an overview of an electricity billing system according to an embodiment. [Diagram 3] FIG. 3 illustrates an example of an outline of the functional configuration of the management device, the smartphone, and the server of the bulk power receiving business operator. [Figure 4] FIG. 4 illustrates an example of an outline of a flowchart of the initial setting executed in the management device. [Diagram 5] FIG. 5 illustrates an example of a power consumption reduction target. [Figure 6] FIG. 6 illustrates an outline of a flowchart for billing an electricity charge, which is implemented by the management device, the resident's smartphone, and the business operator's server. [Figure 7] Figure 7 is an example of a removal request. [Figure 8] Figure 8 shows an example of data on the status of power consumption reduction displayed on the touch panel display of a smartphone. [Figure 9] Figure 9 is an example of a reminder letter. [Figure 10] FIG. 10 shows a specific example of the refund amount. [Figure 11] FIG. 11 illustrates an outline of the return rule according to the first modified example. [Figure 12] FIG. 12 illustrates an outline of the return rule according to the second modified example. [Figure 13] FIG. 13 illustrates an outline of the return rule according to the third modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] §1 Examples of application 1 illustrates an outline of an application example of an electricity billing system 100 according to this embodiment. The electricity billing system 100 includes a management device 2 that manages electricity in an electricity supply system 1 that collectively receives electricity and supplies it to an apartment building, and a smartphone 2a owned by a resident. The management device 2 and the smartphone 2a are connected via a network (N). The smartphone 2a may be, for example, a tablet terminal, a laptop computer, or a desktop computer.

[0028] In the management device 2, a reduction target for the power consumption of each room in the apartment building is determined based on the past power consumption of each room. Then, based on the reduction target and the actual power reduction amount of each room, The amount of the refund is determined for each resident who occupies a room. The electricity bill minus the amount of the refund is then notified to the smartphone 2a of each resident.

[0029] According to the above-described electricity billing system 100, an appropriate reduction target can be set for each room. Furthermore, each resident can receive rebates according to the degree of energy saving. This increases each resident's motivation to save energy, which promotes energy saving. Furthermore, by having residents work on energy saving, they will have a deeper understanding of the environment and will become more conscious of it. Furthermore, it becomes possible for collective housing bulk electricity receiving businesses to reduce the total amount of electricity purchased, and thus the amount of electricity purchased.

[0030] §2 Configuration Example 2 illustrates an overview of an electricity billing system 100 according to this embodiment (an example of an "electricity billing system" in the present disclosure). The electricity billing system 100 includes a management device 2 (an example of an "electricity billing device" in the present disclosure) that manages the power of the electricity supply system 1, a smartphone 2a owned or used by a resident, and a server 2b owned or used by a bulk electricity receiving business operator (hereinafter also referred to as an owner) that collectively receives electricity and supplies it to an apartment building that is a power supply target of the electricity supply system 1. The management device 2, the smartphone 2a, and the server 2b are connected via a network (N).

[0031] The network (N) is, for example, a WAN (Wide Area Network) that is a global public communication network such as the Internet. The network (N) may also include, for example, a telephone communication network such as a mobile phone, or a wireless communication network such as Wi-Fi (registered trademark).

[0032] 2, the solid lines connecting the blocks of the power supply system 1 indicate power lines, and the dashed lines connecting the blocks indicate communication lines (including wireless communication). The power supply system 1 according to this application example is assumed to be applied to an apartment building 1a. In this case, the apartment building 1a is an example of a complex facility including multiple power supply destinations. It is also assumed that the system is equipped with distributed power sources such as solar cells, wind power generators, so-called V2H (Vehicle to Home) power sources, and storage batteries.

[0033] The management device 2 then calculates the electricity fee to be charged to each resident based on the amount of electricity measured by the master smart meter 4 and the smart meters 11a, 11b, 11c, ... 18 (described later).The management device 2 then notifies the electricity fee to, for example, the smartphone 2a of the resident via the network (N).

[0034] In FIG. 2, the power supply system 1 is electrically connected to the power grid 3. When the power supply by the distributed power source is less than the power consumption of the multiple power supply destinations and there is a power shortage, it is possible to purchase power from the power grid 3, for example. When the power supply by the distributed power source is more than the power consumption of the multiple power supply destinations, it is possible to sell the surplus power to, for example, another power grid (not shown). The power exchanged with the power grid 3 is measured by a parent smart meter 4. The power grid 3 may be a so-called retail electricity supplier or a general electricity supplier. A cubicle-type high-voltage power receiving device 20 capable of receiving high-voltage power is installed between the power grid 3 and the parent smart meter 4. If the total amount of power received by the apartment building is low voltage, this device is not necessary.

[0035] Furthermore, the management device 2 is configured to be able to communicate with the system in the apartment building 1a when outside the apartment building 1a. In this application example, the system in the apartment building 1a and the management device 2 are able to communicate wirelessly via an LTE router 6. More specifically, the management device 2 is a server provided on a cloud by a management company that is the operator of the power supply system 1. However, the management device 2 may be connected by wired communication and does not necessarily have to be provided on the cloud as long as it is capable of sending and receiving information between the management device 2 and the system in the apartment house 1a in the power supply system 1. Note that the management device 2 has a function of calculating the electricity fee to be charged to each power supply destination and the refund fee to be refunded from the power used in the apartment house 1a, as described below.

[0036] In addition, the multiple power supply destinations of the power supply system 1 are assumed to be private areas (120a, 120b, 120c, etc.). The private areas (120a, 120b, 120c, etc.) are, for example, each room (hereinafter also referred to as a resident) in the apartment building 1a. In addition, the loads 12a, 12b, 12c, etc. in the private areas (120a, 120b, 120c, etc.) are electrical appliances and the like in each room in the apartment building 1a.

[0037] As shown in Fig. 2, the exclusive use area 120a is provided with a storage battery 121a and a storage battery power conditioner 122a. In this manner, each resident can independently install power storage equipment within his / her exclusive use area.

[0038] In addition to the private areas (120a, 120b, 120c,...), the apartment building 1a also has a common area 13. The common area 13 is a common portion of the apartment building 1a, and the loads of the common area 13 may be, for example, lights 13a in the hallway or entrance, and a specific load distribution board 13b that can automatically supply power to pre-connected electrical appliances during a power outage. The private areas (120a, 120b, 120c,...) and the common area 13 are each equipped with smart meters 11a, 11b, 11c,...11d, making it possible to measure the power supplied to the private areas (120a, 120b, 120c,...) and the common area 13.

[0039] Here, the smart meters 11a, 11b, 11c... provided for the exclusive units 120a, 120b, 120c... are configured to be able to measure not only the power supplied from the first distribution board 9 to the exclusive units 120a, 120b, 120c..., but also the power transmitted from the exclusive units 120a, 120b, 120c... to the first distribution board 9. This makes it possible for a resident of the exclusive unit 120a to use his or her own installed storage battery 121a (storage battery power conditioner 122a) in conjunction with the power supply system 1.

[0040] The power supply system 1 is also provided with a storage battery 14 and a solar cell 15 as distributed power sources. A storage battery power conditioner 16 including a bidirectional DC / DC converter for raising and lowering the charge / discharge voltage and a DC / AC converter for converting the voltage related to the charge / discharge of the storage battery is connected to the storage battery 14. The power output from the storage battery power conditioner 16 is measured by a smart meter 19a. On the other hand, a solar cell power conditioner 17 including a DC / DC converter for adjusting the power generation voltage of the solar cell 15, a control circuit for performing MPPT control using a hill-climbing method, and a DC / AC converter for converting the output voltage of the solar cell 15 into DC / AC is connected to the solar cell 15. The power output from the solar cell power conditioner 17 is measured by a smart meter 19b. The solar cell power conditioner 17 is also electrically connected to the storage battery power conditioner 16, and the power generated by the solar cell 15 can be directly charged to the storage battery 14. In this embodiment, a distributed power source in which the storage battery 14 and the solar cell 15 are integrated may be used.

[0041] In the power supply system 1 shown in FIG. 2 , the storage battery power conditioner 16 and the solar cell power conditioner 17 are connected to a second distribution board 10 for distributed power sources. The second distribution board 10 is then connected to a first distribution board 9 that distributes power to each of the exclusive areas (120a, 120b, 120c,...) and the common area 13. The first distribution board 9 is connected to the power system 3 via a parent smart meter 4. The first distribution board 9 also distributes power to each of the exclusive areas (120a, 120b, 120c,...) and the common area 13 ( outlet).

[0042] As a result, the power generated by the solar cell 15 and the power discharged from the storage battery 14 can be supplied to each of the private areas (120a, 120b, 120c, etc.) and the common area 13. At that time, if the power consumed by the loads in each of the private areas (120a, 120b, 120c, etc.) and the common area 13 is greater than the power supplied by the storage battery 14 and the distributed power source of the solar cell 15, the shortage is replenished by purchasing power from the power grid 3. Also, if the power consumed by the loads in each of the private areas (120a, 120b, 120c, etc.) and the common area 13 is less than the power generated by the solar cell 15, it is possible to sell the surplus power that exceeds the charging capacity of the storage battery 14.

[0043] The input / output power of the exclusive parts (120a, 120b, 120c, etc.) and the common parts 13 measured by the smart meters 11a, 11b, 11c, etc., the input / output power information of the storage battery power conditioner 16 measured by the smart meter 19a, and the output power information from the solar battery power conditioner 17 to the second distribution board 10 measured by the smart meter 19b are provided to the storage battery controller 5 via the gateway 8c and the hub 7. The amount of power purchased from the power grid 3 measured by the parent smart meter 4 is also provided to the storage battery controller 5. The state of the MPPT control in the solar battery power conditioner 17, information such as the terminal current value and voltage value of the solar battery 15, and information such as the amount of power stored in the storage battery 14 and the storage battery 121a are also provided to the storage battery controller 5 via the gateways 8a, 8b, 8d, and the hub 7.

[0044] The battery controller 5 controls the input / output power of the battery power conditioner 16 and the amount of electricity purchased from the power grid 3 based on the power consumption in each exclusive area (120a, 120b, 120c, etc.) and the common area 13, the amount of electricity generated by the solar cells 15 and the amount of electricity stored in the battery 14, the power management policy of the bulk power receiving business operator, the electricity trading market price, etc.

[0045] Similarly, information on the input / output power of the exclusive section (120a, 120b, 120c, etc.) and the common section 13 measured by the smart meters 11a, 11b, 11c, etc., the input / output power of the storage battery power conditioner 16 measured by the smart meter 19a, and the output power from the solar battery power conditioner 17 to the second distribution board 10 measured by the smart meter 19b are also provided to the management device 2 via the gateway 8c, the hub 7, and the LTE router 6. Similarly, the amount of power purchased from the power grid 3 measured by the parent smart meter 4 is also provided to the management device 2. Furthermore, information on the state of MPPT control in the solar battery power conditioner 17, the terminal current value, the voltage value, etc. of the solar battery 15, the amount of power stored in the storage battery 14 and the storage battery 121a, etc. are also provided to the management device 2 via the gateways 8a, 8b, 8d, the hub 7, and the LTE router 6. In the embodiment, information on the amount of power purchased from the power system 3a may be obtained from billing information from the power company instead of being provided to the management device 2 from the smart meter.

[0046] (Functional configuration of management device 2) FIG. 3 shows an example of an outline of the functional configuration of the management device 2, the smartphone 2a, and the server 2b of the bulk power receiving business operator. The management device 2 is a computer having a processor such as a CPU (Central Processing Unit), a main storage device such as a RAM or a ROM, and an auxiliary storage device such as a hard disk drive. The management device 2 also has a communication module capable of communicating with an external device via a network. The auxiliary storage device stores an operating system (OS), various programs, various tables, and the like. The programs stored in the auxiliary storage device are loaded into the working area of ​​the main storage device and executed, and each component is controlled through the execution of the programs, thereby realizing each function that meets a predetermined purpose as described below. In the following, the main storage device and the auxiliary storage device are simply referred to as storage devices.

[0047] The management device 2 includes a communication unit 201. The communication unit 201 includes a communication module. The communication unit 201 controls communication of information with external devices via a network (N).

[0048] The management device 2 also includes a target calculation unit 202 (an example of a "target power calculation unit" in the present disclosure). The target calculation unit 202 sets a reduction target for power consumption. That is, the target calculation unit 202 sets a reduction target for the relevant month to be reduced as a ratio to the power consumption in the relevant month in the past. The power consumption in the relevant month in the past includes the total value of the power consumption in the apartment house 1a. Alternatively, the power consumption in the relevant month in the past includes the power values ​​of the common area 13 and the private areas (120a, 120b, 120c, etc.) measured in the relevant month in the past by the smart meters 11a, 11b, 11c,..., 11d (an example of a "power meter" in the present disclosure). Alternatively, the target calculation unit 202 may set a reduction target for the relevant month based on the electricity rate plan of the apartment house 1a.

[0049] In addition, the target calculation unit 202 determines whether to divide the total power consumption reduction target equally among each exclusive unit (120a, 120b, 120c, etc.), or to divide it among each exclusive unit based on the past power consumption of each exclusive unit (120a, 120b, 120c, etc.).

[0050] Furthermore, when the power consumption of the common unit 13 or the private unit (120a, 120b, 120c,...) in the past month is less than a predetermined threshold, the target calculation unit 202 excludes the common unit 13 or the private unit (120a, 120b, 120c,...) from the power consumption reduction target. By making this exclusion setting, it is possible to avoid unnecessary power reduction requests for a specified space whose power consumption does not meet a certain level.

[0051] Such a method for setting a reduction target for power consumption will hereinafter be referred to as a reduction rule.

[0052] The management device 2 also includes a rebate amount calculation unit 203 (an example of the "rebate amount calculation unit" of the present disclosure). The rebate amount calculation unit 203 sets the rebate amount to be rebated to the resident based on the actual power consumption. In other words, the rebate amount calculation unit 203 sets the proportion of the reduction in power consumption achieved in the common area 13 and the private areas (120a, 120b, 120c, etc.) (the amount of power purchased by the bulk power receiving business operator equivalent to the reduced power consumption) to be rebated to each resident.

[0053] In addition, the rebate amount calculation unit 203 determines whether to divide the entire rebate amount equally among the exclusive units (120a, 120b, 120c, etc.) or to divide it among each exclusive unit according to the power consumption reduction performance of each exclusive unit (120a, 120b, 120c, etc.).

[0054] Furthermore, the refund calculation unit 203 sets whether or not to charge an additional amount to the electricity bill to cover the shortfall when the reduction in power consumption in the common area 13 and the exclusive areas (120a, 120b, 120c, . . . ) has not reached the target.

[0055] Such a method for setting the rebate amount is hereinafter referred to as the rebate rule.

[0056] The management device 2 also includes a guidance unit 204 (an example of the "notification unit" of the present disclosure). The guidance unit 204 sets the power consumption deletion request to be notified to the resident. That is, the guidance unit 204 determines the means of communication for the deletion request from among email, postal mail, and telephone. The guidance unit 204 also sets the date and time for notifying the resident of the deletion request.

[0057] Such settings regarding requests to reduce power consumption are hereinafter also referred to as reduction request rules.

[0058] Furthermore, the guidance unit 204 urges residents who the monitoring unit 205 has determined to be unlikely to achieve the power consumption reduction target (described later) to reduce their power consumption. The guidance unit 204 then determines the means of contact for the urge from among email, postal mail, and telephone. The means of contact may be used in combination.

[0059] The information unit 204 also notifies each resident of the billing fee calculated by the billing unit 206 (described later). The information unit 204 determines the means of contacting each resident from among email, mail, and telephone. The means of contact may be used in combination.

[0060] The management device 2 also includes a monitoring unit 205 (an example of a "determination unit" in the present disclosure). The monitoring unit 205 monitors whether there are any residents who are unlikely to achieve the power consumption reduction target. That is, the monitoring unit 205 determines whether the power consumption in each private unit (120a, 120b, 120c, etc.) is below a predetermined threshold. The private units that are determined to be below the predetermined threshold are then targeted for a urging to reduce power consumption. The monitoring unit 205 sets the date for this determination from within the month of the target for deletion.

[0061] Such settings regarding the prompting to reduce power consumption will hereinafter be referred to as reduction prompting rules.

[0062] The management device 2 also includes a billing unit 206 (an example of the "electricity fee calculation unit" of the present disclosure). The billing unit 206 calculates an electric power fee according to the power consumption in each exclusive unit (120a, 120b, 120c, etc.). The billing unit 206 then adds or subtracts the refund amount calculated by the refund amount calculation unit 203 from the electric power fee. The billing unit 206 then bills the electric power fee, with the refund amount added or subtracted, as the amount to be charged to the resident.

[0063] The management device 2 also includes a storage unit 207. The storage unit 207 includes a storage device. The storage unit 207 stores the power consumption reduction rules (each private unit (120a, 120b, 120c,...)) set in the target calculation unit 202 in the storage device. The storage unit 207 also stores data of the power consumption reduction target set in the target calculation unit 202 (the entire apartment building 1a, the common area 13, and each private unit (120a, 120b, 120c,...)) in the storage device. The storage unit 207 also stores data of past power consumption (the entire apartment building 1a, the common area 13, and each private unit (120a, 120b, 120c,...)) used when the power consumption reduction target is set in the storage device. The memory unit 207 also stores data on the power consumption for the month to be reduced (for the entire apartment building 1a, the common area 13, and each private area (120a, 120b, 120c,...)) in the storage device. The memory unit 207 also stores data on the electricity rate plan (for the entire apartment building 1a, the common area 13, and each private area (120a, 120b, 120c,...)) in the storage device.

[0064] The memory unit 207 also stores in the storage device the actual power consumption reduction results for the relevant month (the entire apartment building 1a, the common area 13, and each private area (120a, 120b, 120c,...)). The memory unit 207 also stores in the storage device the rebate rules for deriving the amount of rebate to each resident (the entire apartment building 1a, the common area 13, and each private area (120a, 120b, 120c,...)). The memory unit 207 also stores in the storage device the data on the amount of rebate calculated by the rebate amount calculation unit 203 (the entire apartment building 1a, the common area 13, and each private area (120a, 120b, 120c,...)).

[0065] The storage unit 207 also stores the reduction request rule and reduction reminder rule in the storage device. The storage unit 207 also stores the contact information of the resident, such as email address, telephone number, and address, in the storage device. By storing the contact information of the resident in the storage device in this way, the contact information of the resident can be used to make requests for reduction in power consumption and to issue instructions for reducing power consumption, as described below. The court may notify tenants of the payment of electricity charges or the collection of the utility bill.

[0066] Furthermore, the memory unit 207 stores in the storage device a predetermined threshold value used when the monitoring unit 205 determines whether or not the power consumption in each exclusive unit (120a, 120b, 120c, etc.) during the month will reach the reduction target.

[0067] (Functional configuration of smartphone 2a) The smartphone 2a is a portable terminal equipped with a processor such as a CPU, a storage device such as a RAM and a ROM, a camera, a touch panel display, and a communication module. The storage device stores an operating system (OS), various programs, various tables, etc., and the programs stored therein are loaded into a working area of ​​a main storage device and executed. Each component is controlled through the execution of the programs, thereby realizing each function that meets a specific purpose, as described below.

[0068] The smartphone 2a includes a communication unit 221. The communication unit 221 includes a communication module. The communication unit 221 controls communication of information with an external device via a network (N).

[0069] The smartphone 2a also includes a reception unit 222. The reception unit 222 includes a touch panel display. The reception unit 222 receives input by operating the touch panel display. The reception unit 222 then executes various processes in response to the received input.

[0070] The smartphone 2a also includes a display unit 223. The display unit 223 includes a touch panel display. The display unit 223 displays information on the touch panel display.

[0071] (Functional configuration of the operator's server 2b) The server 2b is a computer having a processor such as a CPU (Central Processing Unit), a main storage device such as a RAM or a ROM, and an auxiliary storage device such as a hard disk drive, just like the management device 2. The management device 2 also has a communication module capable of communicating with an external device via a network. The auxiliary storage device stores an operating system (OS), various programs, various tables, and the like. The programs stored in the auxiliary storage device are loaded into the working area of ​​the main storage device and executed, and each component is controlled through the execution of the programs, thereby realizing each function that meets a predetermined purpose, as described below.

[0072] The server 2b includes a communication unit 241. The communication unit 241 includes a communication module. The communication unit 241 controls communication of information with an external device via a network (N).

[0073] The server 2b also includes a storage unit 242. The storage unit 242 includes a storage device.

[0074] The server 2b also includes a reception unit 243. The reception unit 243 includes an input device such as a keyboard connected to the server 2b. The reception unit 243 receives input operations from the keyboard or the like. The reception unit 243 then executes various processes in response to the received input.

[0075] The server 2b also includes a display unit 244. The display unit 244 is connected to the server 2b. The display unit 244 displays information on a display connected to the server 2b.

[0076] FIG. 4 is a flowchart showing an example of an initial setting process executed in the management device 2. In the following description, the common area 13 will simply be referred to as the common area. The private areas (120a, 120b, 120c, etc.) will be referred to as Rooms 101, 102, 201, and 202.

[0077] (Step S11) In step S11, the target calculation unit 202 sets a reduction target for power consumption. FIG. 5 illustrates an example of a reduction target for power consumption set by the target calculation unit 202. As shown in FIG. 5, the target calculation unit 202 sets the reduction target for the relevant month to be reduced in power consumption to, for example, 10% of the power consumption in the relevant month in the past (for example, the previous year). That is, for example, in the case of Room 101, the power consumption in the relevant month in the previous year was 300 kWh, so the reduction target is set to 30 kWh. In addition, such a reduction target is set for, for example, the common area and each room (an example of "calculating a reduction target for power consumption for each specified space" in the present disclosure). Note that, if the power consumption in the relevant month in the past is 100 kWh or less, the target calculation unit 202 does not target the relevant space for deletion. That is, in the example of FIG. 5, the common area is not targeted for reduction. Note that step S11 is an example of the "target power calculation step" in the present disclosure.

[0078] Furthermore, the storage unit 207 stores the reduction rules (for each room) and the power consumption reduction targets (for the entire apartment building 1a, the common areas, and each room) set as described above in a storage device.

[0079] In addition, in Figure 5, the electricity bill for the past month is shown for reference, assuming that the electricity purchase price of the bulk electricity receiving company is 30 yen / kWh. The electricity bill corresponding to the reduction target is also shown.

[0080] (Step S12) In step S12, the rebate calculation unit 203 sets the rebate rule. The rebate calculation unit 203 sets the rebate rate to, for example, 80% for the reduction amount of power consumption in the relevant month. The rebate calculation unit 203 also distributes the total amount of rebate determined in this way to each room according to the actual degree of power reduction in each room. The memory unit 207 also stores the rebate rule set in this way in the memory device.

[0081] (Step S13) In step S13, the information unit 204 sets a rule for requesting deletion of power consumption. That is, the information unit 204 determines the means of contacting the deletion request to be, for example, email. Then, the information unit 204 sets the sending date of the email to be sent to each resident to, for example, the month before the relevant month.

[0082] (Step S14) In step S14, the monitoring unit 205 sets a reduction prompting rule for prompting a resident who is unlikely to achieve the power consumption reduction target to reduce power consumption. That is, the monitoring unit 205 sets that the reduction prompt is to be performed on the 20th of the relevant month, for example. The monitoring unit 205 also determines whether the daily achievement rate of the power consumption reduction up to the 20th of the relevant month is 100%. Then, if the daily achievement rate of the power consumption reduction is less than 100%, it decides to perform the reduction prompt. The memory unit 207 also stores in the memory device that the threshold for the reduction prompt is 100% of the daily achievement rate. Note that the daily achievement rate of the power consumption reduction up to the 20th of the relevant month being 100% is an example of the "threshold for achievement of the reduction target" in the present disclosure.

[0083] FIG. 6 illustrates an outline of a flowchart for billing an electricity charge, which is implemented by the management device 2 after the initial settings as shown in FIG. 5 have been completed, the resident's smartphone 2a, and the business operator's server 2b.

[0084] (Step S1) In step S1, the target calculation unit 202 reads out from the storage device the power consumption reduction rule that was set in advance in the above-mentioned step S11. The read-out reduction target is then transmitted to the server 2b of the bulk power receiving business operator via the communication unit 221. In the server 2b, the reduction rule for each room is received via the communication unit 241, and is displayed by the display unit 244 on a display connected to the server 2b.

[0085] Here, the bulk electricity receiving business operator checks the reduction rules displayed on the display. If the bulk electricity receiving business operator recognizes that there is a problem with the reduction rules, the bulk electricity receiving business operator inputs a request to change the reduction rules by operating an input device such as a keyboard. Then, the reception unit 243 transmits a request to change the reduction rules to the management device 2 via the communication unit 241.

[0086] The management device 2 receives the request to change the reduction rules via the communication unit 221. In such a case, the target calculation unit 202 changes the reduction rules and sets a reduction target. Then, the new reduction rules for each room are transmitted via the communication unit 221 to the server 2b of the bulk electricity receiving business operator.

[0087] If there is no change in the reduction rule from server 2b, target calculation unit 202 determines the reduction target to be the preset power consumption reduction target (see FIG. 5). Furthermore, server 2b stores the received reduction rule for each room in a storage device.

[0088] (Step S2) In step S2, the information unit 204 notifies the resident of the request to delete the power consumption. FIG. 7 is an example of the text of the deletion request. As shown in FIG. 7, the text includes the reduction target data determined in step S1. The text also includes the data on the power consumption and electricity charges for the past month stored in the storage device. The information unit 204 then sends a reduction request email to the smartphone 2a of the resident who is the target of the reduction via the communication unit 201, in accordance with the reduction request notification rule set in step S13. The deletion request text is automatically generated by the information unit 204.

[0089] (Step S3) In step S3, the reception unit 222 of the smartphone 2a receives an operation on the touch panel display of the smartphone 2a of the resident for the month to be deleted. Then, data on the reduction target and reduction status of power consumption for the month is acquired from the management device 2 via the communication unit 221. Then, the display unit 223 displays the acquired data on the touch panel display.

[0090] Fig. 8 is an example of data on the power consumption reduction status displayed on the touch panel display of the smartphone 2a. As shown in Fig. 8, the displayed data shows the power consumption reduction target and the current reduction performance. The current power consumption reduction performance is sequentially stored in the storage device by the storage unit 207 in the management device 2.

[0091] (Step S4) In step S4, in the month that is the target of reduction, in accordance with the power consumption reduction prompting rules set in step S14, the monitoring unit 205 determines whether the degree of power reduction in each room on the 20th of the month is less than 100% as a daily achievement rate. If there is a room where the daily rate of achievement of the degree of power reduction is less than 100%, the notification unit 204 generates a message urging the corresponding occupant to reduce power consumption.

[0092] FIG. 9 is an example of a reminder message. As shown in FIG. 9, the message includes the reduction target data determined in step S1. The message also includes the actual data of the power consumption up to the relevant day stored in the storage device. The message also describes the pace at which the target can be achieved in the remaining number of days. The notification unit 204 automatically generates such a message. Then, the notification unit 204 transmits a reminder email for reduction to the smartphone 2a of the resident who is the reminder target via the communication unit 201.

[0093] (Step S5) In step S5, the rebate calculation unit 203 calculates the rebate amount according to the rebate rule set in step S12 for the month following the month of the reduction target. FIG. 10 illustrates a specific example of the rebate amount. As shown in FIG. 10, for example, if the total power consumption in the month is 1320 kWh, the total power consumption in the past month is 1450 kWh, so 130 kWh of power has been reduced. Therefore, if the power purchase amount of the business operator is, for example, 25 yen / kWh, the power purchase amount of the business operator has been reduced by 130×25=3250 yen compared to the past month. And since the rebate rate is set to 80%, the total rebate amount is 3250×0.8=2600 yen. And, this total rebate amount of 2600 yen is apportioned to each room according to the amount of power reduction of each room that is the target of power reduction. For example, in room 101, the total reduction amount of each room is 140 kWh, but 40 kWh has been reduced. Therefore, the proportion of Room 101 in the total reduction amount is approximately 28.6%. Therefore, 28.6% of the total refund amount of 2600 yen, or 743 yen, will be returned to the resident of Room 101. Note that step S5 is an example of the "refund amount calculation step" of the present disclosure.

[0094] Furthermore, the memory unit 207 stores data on the power consumption (entire apartment building 1a, common areas, and each room), reduction results (entire apartment building 1a, common areas, and each room), and refund amount (entire apartment building 1a, common areas, and each room) for the relevant month in the memory unit. Furthermore, the refund amount calculation unit 203 transmits the reduction results (entire apartment building 1a, common areas, and each room) for the relevant month to the business operator's server 2b via the communication unit 201. In the business operator's server 2b, the data on the reduction results (entire apartment building 1a, common areas, and each room) for the relevant month is received via the communication unit 241, and the memory unit 242 stores the reduction results data in the memory unit.

[0095] (Step S6) In step S6, the billing unit 206 performs a process of subtracting the rebate amount calculated in step S5 from the electricity bill for that month. Note that the normal charge listed in the actual results for that month in Fig. 10 is the amount of electricity usage multiplied by the amount of electricity sold by the company (e.g. 30 yen / kWh). If the rebate amount is not taken into account, this charge will be billed to the resident.

[0096] Moreover, the rightmost column in FIG. 10 illustrates an example of the electricity charge for the relevant month with the refund amount subtracted from it. This process is executed in the month following the relevant month. The information unit 204 then transmits the electricity charge with the refund amount subtracted as the billed amount to the smartphone 2a of each resident via the communication unit 201. The smartphone 2a receives the billed amount data via the communication unit 221. The display unit 223 then displays the received billed amount on the touch panel display. In this way, each resident can check the billed amount for the relevant month. Step S6 is an example of the "electricity charge calculation step" of the present disclosure.

[0097] [Actions and Effects] According to the above-described power fee billing system 100, the reduction target for each room in a given month is set to 10% of the power consumption in the room in the past month. This is an achievable and appropriate reduction target, and will increase each resident's motivation to save electricity.

[0098] Moreover, according to the above-described power billing system 100, as shown in FIG. 10, a rebate can be received according to the ratio of the reduction amount of each room to the total reduction amount. Therefore, each resident can receive a rebate according to the amount of power reduction, and each resident's motivation to save electricity increases. Therefore, according to the above-described power billing system 100, electricity saving is promoted. Furthermore, by the resident's efforts to save electricity, their understanding of the environment deepens and their awareness improves. Furthermore, the collective electricity receiving business operator for the apartment complex can reduce the total amount of electricity purchased from 1450 kWh to 1320 kWh, as shown in FIG. 10. Therefore, the amount of electricity purchased can be reduced by (1450-1320) kWh x 25 yen / kWh = 3250 yen from the past.

[0099] Furthermore, according to the above-described power fee billing system 100, as shown in step S3 of FIG. 6, the resident can check the actual power consumption on the smartphone 2a. Therefore, the resident can understand the power shortage amount until the reduction target is reached. Therefore, the failure to reach the reduction target of the power consumption is suppressed. Therefore, the promotion of power saving is more surely promoted.

[0100] In addition, according to the above-described power fee billing system 100, as shown in step S4 of FIG. 6, a resident who is in danger of not achieving the reduction target in the middle of the month (the 20th) is prompted to reduce the power consumption. This prevents the reduction target from being unattained. This makes it more certain that energy saving will be promoted.

[0101] §3 Variations [First Modification] FIG. 11 illustrates an outline of the rebate rule according to the first modified example. In the rebate rule according to the first modified example, the power reduction target and the actual reduction performance of the common area and each room are the same as those in the embodiment (see FIG. 5 and FIG. 10). Therefore, the total rebate amount is 2600 yen, the same as in the embodiment.

[0102] As shown in FIG. 11, in the rebate rule for the first modification, the rebate amount is apportioned according to the achievement rate of the reduction target. For example, the reduction target for Room 101 is 30 kWh, while the actual reduction amount is 40 kWh. Therefore, the achievement rate is 133%. Therefore, Room 101 accounts for approximately 32.8% of the overall achievement rate of 405%. Therefore, of the total rebate amount of 2,600 yen, 32.8%, or 856 yen, is rebated to the occupant of Room 101.

[0103] Meanwhile, the electricity reduction for Room 202 was 40kWh, the same as Room 101. However, because the reduction target was set at 40kWh, the achievement rate was 100%. Therefore, Room 202's share of the overall achievement rate of 405% was approximately 24.7%. Therefore, of the total refund amount of 2,600 yen, 24.7%, or 642 yen, will be returned to the resident of Room 202.

[0104] [Actions and Effects] According to the rebate rule for the first modification, even if the power reduction amount is the same for rooms 101 and 202 (40 kWh), room 101, which has a higher reduction achievement rate, will receive more rebate. Therefore, the resident who has contributed more to the reduction target can receive more rebate. This can further increase the resident's motivation to save electricity. This can more reliably promote energy saving.

[0105] [Second modified example] FIG. 12 illustrates an outline of the rebate rule according to the second modified example. In the rebate rule according to the second modified example, the power reduction targets for the common areas and each room are the same as those in the embodiment (see FIG. 5). However, the rebate rule according to the second modified example is applied when the power consumption of some rooms (room 201) exceeds the reduction target, for example, as shown in FIG. 12.

[0106] That is, in the case shown in Figure 12, for example, the total power consumption in the month is 1400kWh, and the total power consumption in the past month is 1450kWh, so 50kWh of power has been reduced. Therefore, if the power purchase amount of the business operator is 25 yen / kWh, for example, the power purchase amount of the business operator has been reduced by 50 x 25 = 1250 yen compared to the past month. And since the rebate rate is set to 80%, the total rebate amount is 1250 x 0.8 = 1000 yen.

[0107] In this case, even though Room 201's past power consumption for that month was 350kWh and the reduction target was 35kWh, if the actual power consumption is 380kWh, not only has the reduction target been met, but it has actually exceeded the past power consumption for that month. The excess power consumption (-30kWh) over Room 201's past power consumption for that month is equivalent to 50% of the total reduced power consumption of 60kWh for the common areas and each room. Therefore, the total refund amount of 1000 yen will be increased by 50% to the regular rate (11400 yen), or 50% of the normal rate. In other words, the amount billed to the occupant of Room 201 will be 11900 yen.

[0108] In addition, since the other rooms have achieved their reduction targets, the refund for each room will be the total refund amount of 1,000 yen divided proportionately based on the reductions achieved. In other words, for example, the total reduction for each room is 60 kWh, while the reduction for Room 101 is 40 kWh. Therefore, the reduction for Room 101 accounts for approximately 66.7% of the total reduction. Therefore, 667 yen, which is 66.7% of the total refund amount of 1,000 yen, will be refunded to the occupant of Room 101.

[0109] In the second variant, the electricity bill is increased as a penalty if the power consumption exceeds the amount consumed in the previous month. However, the electricity bill may also be increased if the power consumption does not exceed the amount consumed in the previous month but the reduction target has not been achieved.

[0110] [Actions and Effects] According to the rebate rule of the second modification, if the reduction target is not achieved and the power consumption exceeds the amount of the previous month, the resident is charged a penalty. This prevents the reduction target from being achieved and prevents the power consumption from increasing compared to the previous month. This promotes power saving.

[0111] [Third Modification] Fig. 13 illustrates an outline of the rebate rule according to the third modified example. In the rebate rule according to the third modified example, the power reduction target and the actual power consumption of the common area and each room are the same as those of the second modified example (see Fig. 12).

[0112] In the rebate rule according to the third modification, the excess amount is not charged to room 201, which exceeded the power consumption of the past month. That is, the total rebate amount of 1000 yen is apportioned among the rooms other than room 201 according to the reduction results (see FIG. 13). That is, for example, the reduction amount of room 101 is 40 kWh, while the total reduction amount of rooms 101, 102, and 202, excluding room 201, is 90 kWh. Therefore, the ratio of the reduction amount of room 101 to the total reduction amount of rooms 101, 102, and 202 is about 44.4%. Therefore, the rebate amount of the occupant of room 101 is 444 yen, which is 44.4% of the total rebate amount of 1000 yen. Therefore, 7156 yen, which is the normal fee (7800 yen) minus 444 yen, is charged to the occupant of room 101.

[0113] On the other hand, Room 201, which exceeded its power consumption for the relevant month in the past, will be charged the regular electricity rate (11,400 yen) without any increase in the amount for the excess.

[0114] In the third variant, if the power consumption exceeds the amount consumed in the previous month, the excess amount will not be charged. However, if the power consumption does not exceed the amount consumed in the previous month but the reduction target has not been achieved, the electricity bill may be charged without increasing the amount of the shortfall.

[0115] [Actions and Effects] According to the rebate rule of the third modification, even if the power consumption exceeds the power consumption of the previous month, the electricity bill charged to the resident will not increase. Therefore, the economic and mental burden imposed on the resident for saving electricity is reduced.

[0116] [Other variations] The electricity billing system 100 may be formed by having some of the functions in the management device 2 executed by another server. Furthermore, the reduction urging by the monitoring unit 205 and the notification unit 204 may not be executed.

[0117] The rebate rules of the rebate calculation unit 203 are not limited to the above embodiment, and the rebate amount may be determined using at least one of the past electricity usage records of each resident, the usage records of the entire apartment building 1a, the electricity rate plan of the apartment building 1a, the rate plan for the residents, the electricity rate records of the entire apartment building 1a, the electricity usage records of each resident, and the reduction target amount. The reduction target is not limited to each room, and may be set for each building where multiple rooms are gathered.

[0118] The embodiments and modifications disclosed above can be combined with each other.

[0119] In the following, the components of the present invention will be described with reference to the reference numerals in the drawings in order to make it possible to compare the components of the present invention with the configurations of the embodiments. <Appendix 1> An electricity billing system (100) for an apartment building (1a), comprising: a target power calculation unit (202) that calculates a reduction target of power consumption for each predetermined space in the apartment building (1a); a rebate amount calculation unit (203) that calculates a rebate amount to be given to the occupants of the apartment building (1a) based on the reduction target calculated by the target power calculation unit (202) and the actual power consumption; and an electricity charge calculation unit (204) that calculates an electricity charge to be charged to the resident based on the power consumption actually consumed and the rebate amount calculated by the rebate amount calculation unit (203). An electricity billing system (100). <Appendix 2> The power fee calculation unit (204) determines the amount of rebate according to the degree of contribution of the actual reduction in power consumption. The electricity billing system (100) of claim 1. <Appendix 3> When the actually consumed power does not reach the reduction target, the power charge calculation unit (204) adds a charge corresponding to the shortfall to the power charge corresponding to the actually consumed power. 3. An electricity billing system (100) according to claim 1 or 2. <Appendix 4> The power charge calculation unit (204) calculates whether the actually consumed power is less than the reduction target. If the target is met, the power fee is calculated without adding the fee corresponding to the unmet amount to the power fee corresponding to the power consumption actually consumed. 3. An electricity billing system (100) according to claim 1 or 2. <Appendix 5> the target power calculation unit (202) calculates the reduction target based on at least one of the past power consumption of the entire apartment building (1a), the past power consumption acquired from the watt-hour meters (11a, 11b, 11c, ... 18) installed in the common areas and the private areas of the residents in the apartment building (1a), and the electricity rate plan of the apartment building (1a); An electricity billing system (100) according to any one of claims 1 to 4. <Appendix 6> A display unit (223) that displays the reduction target and the actual power consumption is further provided. An electricity billing system (100) according to any one of claims 1 to 5. <Appendix 7> a determination unit (205) that determines whether the actually consumed power is lower than a threshold value related to achievement of the reduction target; and a notification unit (204) that notifies the occupant that the determination unit (205) has determined that the actual power consumption is lower than a threshold value related to achievement of the reduction target. An electricity billing system (100) according to any one of claims 1 to 6. <Appendix 8> An electricity billing program for an apartment building (1a), comprising: A target power calculation step (S11) of calculating a power consumption reduction target for each predetermined space in the apartment building (1a); a rebate amount calculation step (S5) of calculating a rebate amount to be given to the occupants of the apartment building (1a) based on the reduction target calculated in the target power calculation step (S11) and the actual power consumption; and (S6) calculating an electricity charge to be charged to the resident based on the power consumption actually consumed and the rebate amount calculated in the rebate amount calculation step (S5). Electricity billing program. <Appendix 9> An electricity billing device (2) for an apartment building (1a), a target power calculation unit (202) that calculates a reduction target of power consumption for each predetermined space in the apartment building (1a); a rebate amount calculation unit (203) that calculates a rebate amount to be given to the occupants of the apartment building (1a) based on the reduction target calculated by the target power calculation unit (202) and the actual power consumption; and an electricity charge calculation unit (204) that calculates an electricity charge to be charged to the resident based on the power consumption actually consumed and the rebate amount calculated by the rebate amount calculation unit (203). Electricity billing device (2). [Explanation of symbols]

[0120] 1: Power supply system 1a:Apartment housing 2: Management device 2a: Smartphone 2b: Server 3: Power system 4: Parent smart meter 5: Battery controller 6: LTE router 7: Hub 8: Gateway 9: First distribution board 10: Second distribution board 11: Smart meters 12: Load 13:Common area 13a: Lighting 13b:Specific load distribution board 14: Battery 15: Solar cell 16: Battery power conditioner 17: Solar power conditioner 18: Smart meter 19: Smart meter 20: Cubicle-type high-voltage power receiving device 100: Power management system 201: Communications Department 202:Target calculation section 203: Rebate amount calculation unit 204: Information Department 205: Monitoring Department 206: Billing Department 207: Storage section 221: Communications Department 222: Reception 223:Display section 241: Communications Department 242: Storage section 243: Reception 244:Display section

Claims

1. An electricity billing system for an apartment building managed by a bulk electricity receiving business operator, comprising: a target power calculation unit that calculates a power consumption reduction target for each predetermined space in the apartment building; a rebate amount calculation unit that calculates a rebate amount to be provided to a resident of the specified space of the apartment building based on the reduction target calculated by the target power calculation unit and the power consumption actually consumed for each specified space; and an electric power rate calculation unit that calculates an electric power rate to be charged to the resident by the bulk electric power receiving business operator based on the electric power consumption actually consumed and the rebate amount calculated by the rebate amount calculation unit, The rebate amount calculation unit calculates the rebate amount for each resident of the apartment complex by dividing the rebate amount by at least a portion of the reduction in the amount of the power purchased by the bulk power receiving business operator resulting from the actual reduction in the power consumption, in accordance with the contribution of the actual reduction in the power consumption to the reduction target. Electricity billing system.

2. When the actually consumed power does not reach the reduction target, the power charge calculation unit adds a charge corresponding to the shortfall to the power charge corresponding to the actually consumed power. The electricity billing system of claim 1 .

3. When the actually consumed power does not reach the reduction target, the power rate calculation unit calculates the power rate without adding a fee corresponding to the shortfall to the power rate corresponding to the actually consumed power. The electricity billing system of claim 1 .

4. The target power calculation unit calculates the reduction target power based on at least one of the past power consumption of the entire apartment building, the past power consumption obtained from power meters installed in common areas and private areas of the apartment building, and the electricity rate plan of the apartment building. Calculate the target, An electricity billing system according to any one of claims 1 to 3.

5. A display unit that displays the reduction target and the actual power consumption is further provided. An electricity billing system according to any one of claims 1 to 4.

6. a determination unit that determines whether the actually consumed power is lower than a threshold value related to achievement of the reduction target; and a notification unit that notifies the occupant that the determination unit has determined that the actual power consumption is lower than a threshold value related to achievement of the reduction target. An electricity billing system according to any one of claims 1 to 5.

7. An electricity billing program for an apartment building managed by a bulk electricity receiving business operator, comprising: a target power calculation step of calculating a power consumption reduction target for each predetermined space in the apartment building; a rebate amount calculation step of calculating a rebate amount to be given to a resident of the specified space of the apartment building based on the reduction target calculated in the target power calculation step and the power consumption actually consumed for each specified space; an electric power fee calculation step of calculating an electric power fee to be charged to the resident by the bulk electric power receiving business operator based on the actually consumed electric power and the rebate amount calculated in the rebate amount calculation step; In the rebate amount calculation step, at least a part of the reduction in the amount of the power purchase by the bulk power receiving business operator resulting from the actual reduction in the power consumption is used as a source of the rebate amount, and the source of the rebate amount is apportioned among the residents of the apartment complex in accordance with the degree of contribution of the actual reduction in the power consumption to the reduction target, thereby calculating the individual rebate amounts; to cause a computer to execute Electricity billing program.

8. An electricity billing device for an apartment building managed by a bulk electricity receiving business operator, comprising: a target power calculation unit that calculates a power consumption reduction target for each predetermined space in the apartment building; a rebate amount calculation unit that calculates a rebate amount to be provided to a resident of the specified space of the apartment building based on the reduction target calculated by the target power calculation unit and the power consumption actually consumed for each specified space; and an electric power rate calculation unit that calculates an electric power rate to be charged to the resident by the bulk electric power receiving business operator based on the electric power consumption actually consumed and the rebate amount calculated by the rebate amount calculation unit, The rebate amount calculation unit calculates the rebate amount for each resident of the apartment complex by dividing the rebate amount by at least a portion of the reduction in the amount of the power purchased by the bulk power receiving business operator resulting from the actual reduction in the power consumption, in accordance with the contribution of the actual reduction in the power consumption to the reduction target. Electricity billing device.

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