Containing frame capable of being spliced and combined cabinet for photovoltaic energy storage system

Abstract

The utility model provides a splicable accommodating rack and a combined cabinet for a photovoltaic energy storage system, which belong to the technical field of industrial and commercial energy storage systems, and comprise a rack body module, the rack body module is provided with an accommodating cavity for accommodating a functional module, the top of the rack body module is provided with a first connecting part, and the bottom of the rack body module is provided with a second connecting part; the first connecting part and the second connecting part can form a complementary inserting structure, and one of the first connecting part and the second connecting part of one frame body module can be connected with the other one of the first connecting part and the second connecting part of the other frame body module in an inserting manner, so that the frame body module can be detachably connected with the other frame body module; the beneficial effects of the photovoltaic energy storage system are that the accommodating racks are designed to be of a module structure capable of being spliced, a plurality of accommodating racks can be spliced to form the cabinet body, and the accommodating racks can be added or disassembled according to needs, so that all functional modules in the photovoltaic energy storage system can be freely combined, and the flexibility of the photovoltaic energy storage system is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of industrial and commercial energy storage systems, and relates to a modular housing and a combined cabinet for photovoltaic energy storage systems. Background Technology

[0002] In commercial and industrial energy storage systems, integrated energy storage units typically combine a Static Transfer Switch (STS), a Power Conversion System (PCS), and a Maximum Power Point Tracker (MPPT). These components are integrated into a fixed cabinet, forming a highly integrated energy storage system. However, the fixed cabinet design introduces certain limitations, especially when expansion or adjustment is needed based on actual requirements, making it less flexible.

[0003] In traditional integrated cabinets, the number of input / output interfaces of the STS, the DC-side terminal capacity of the PCS, and the photovoltaic string access channels of the MPPT are all set based on initial requirements. For example, a typical STS device is only configured with 3 input interfaces. When a user needs to add a fourth PCS, this not only requires expanding a new mounting slot in the cabinet, but also requires adding an additional STS device. Due to the limitations of the cabinet's physical space and electrical structure, it is not possible to directly expand or insert new PCS and STS devices. Usually, an additional cabinet or external power distribution unit needs to be deployed, resulting in wasted installation space and increased costs.

[0004] From a manufacturing perspective, due to the significant differences in configuration requirements for STS, PCS, and MPPT across different customer scenarios, manufacturers need to develop customized cabinet structures for each configuration combination. This undoubtedly increases the complexity and production costs of the manufacturing process. Furthermore, customized cabinets have poor installation compatibility. If customer needs change later (e.g., adding new photovoltaic strings requiring additional MPPT equipment), the original cabinet cannot be easily adapted to the new configuration, forcing manufacturers to redesign and replace the entire cabinet. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a modular housing and a combined cabinet for photovoltaic energy storage systems.

[0006] The objective of this utility model can be achieved through the following technical solution: a modular housing, comprising: a frame module, wherein the frame module is provided with a housing cavity for accommodating functional modules, a first connecting part is provided at the top of the frame module, and a second connecting part is provided at the bottom of the frame module, wherein the first connecting part and the second connecting part can form a complementary plug-in structure, and one of the first connecting part and the second connecting part of the frame module can be plugged into the other of the first connecting part and the second connecting part of another frame module, so that the frame module can be detachably connected to another frame module.

[0007] Preferably, the functional module is one of a static transfer switch, a maximum power point tracker, and an energy storage converter, and the size of the receiving cavity is set to match the size of the functional module.

[0008] Preferably, the frame module adapted to the static changeover switch includes a top plate, a cabinet door, and two side plates. The top plate and the two side plates are provided with wire-passing holes, and the wire-passing holes are provided with detachable or breakable sealing surfaces.

[0009] Preferably, the receiving cavity of the frame module adapted to the static changeover switch is provided with a slide rail, and the slide rail is located above the bottom of the frame module.

[0010] Preferably, one of the first connecting portion and the second connecting portion is configured as a plug groove and the other is configured as a plug connector, wherein the outline shape of the plug connector is adapted to the shape of the plug groove.

[0011] Preferably, both the first connecting part and the second connecting part are configured as tubular structures, and both the first connecting part and the second connecting part have connecting holes on their tube walls for screws to pass through. When the first connecting part and the second connecting part form a plug-in structure, they can be fixedly connected by screws.

[0012] Preferably, the frame module includes two rectangular frames located on both sides of it. Each rectangular frame includes two columns and two crossbeams. The two ends of one crossbeam are connected to one end of each of the two columns, and the two ends of the other crossbeam are connected to the other ends of each of the two columns.

[0013] Preferably, in the frame module adapted to the maximum power point tracker or the energy storage converter, the two ends of the column are respectively provided with the plug slot and the plug connector; in the frame module adapted to the static transfer switch, each of the rectangular frames has three plug connectors on one of the crossbeams and two plug connectors on the other crossbeam.

[0014] Preferably, the frame module further includes a reinforcing member, which is inclined and whose two ends are respectively fixedly connected to two adjacent columns.

[0015] A modular cabinet for a photovoltaic energy storage system includes at least two of the aforementioned modular housings, wherein the various housing modules are stacked and assembled to form a cabinet; in two adjacent housing modules, one of the first connecting portion and the second connecting portion of one housing module can be inserted into the other of the first connecting portion and the second connecting portion of the other housing module.

[0016] Preferably, the cabinet includes at least one frame module for installing an energy storage converter, at least one frame module for installing a static transfer switch, or at least one frame module for installing a maximum power point tracker.

[0017] Preferably, the width of the frame module adapted to the maximum power point tracker is equal to the width of the frame module adapted to the energy storage converter, and the height of the frame module adapted to the maximum power point tracker is less than the height of the frame module adapted to the energy storage converter.

[0018] Preferably, the width of the frame module adapted to the static transfer switch is equal to the width of the frame module adapted to the maximum power point tracker and the width of the frame module adapted to the energy storage converter.

[0019] The length of the frame module adapted to the static transfer switch is greater than the length of the frame module adapted to the maximum power point tracker and the length of the frame module adapted to the energy storage converter.

[0020] Preferably, the front column of the frame module adapted to the static changeover switch is offset backward relative to the front columns of the other frame modules.

[0021] Preferably, the frame module that adapts to the static changeover switch is located on top of the other frame modules, and the rear of the frame module that adapts to the static changeover switch is suspended.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] 1. The housing rack is designed as a modular structure that can be spliced ​​together. Multiple housing racks can be spliced ​​together to form a cabinet. Housing racks can be added / disassembled as needed, which allows the various functional modules in the photovoltaic energy storage system to be freely combined, greatly improving the flexibility of the photovoltaic energy storage system.

[0024] 2. This solution utilizes a modularly designed frame module to enable the free combination and flexible configuration of key functional modules in the photovoltaic energy storage system (such as the static transfer switch (STS), maximum power point tracker (MPPT), and energy storage converter (PCS). Each frame module can precisely accommodate specific functional modules and achieve rapid assembly through complementary plug-in structures at the top and bottom, thus facilitating the assembly of a complete energy storage cabinet.

[0025] 3. In the actual structure, one frame module can mate with the first connecting part (plug-in slot or plug-in joint) on the top of another frame module via its second connecting part (plug-in slot or plug-in joint) at the bottom. This method allows modules to be stacked vertically layer by layer to form a multi-layer structure. During installation, simply align the plug-in joint of the upper module with the plug-in slot of the lower module and gently insert it to complete the initial connection. The entire process requires no complicated tools and is simple and efficient. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the housing frame of this utility model.

[0027] Figure 2 This is a structural schematic diagram of the housing rack of this utility model from another perspective.

[0028] Figure 3 This is an exploded view of two frame modules of this utility model, each equipped with a functional module.

[0029] Figure 4 This is a schematic diagram showing the connection relationship between the two frame modules of this utility model.

[0030] Figure 5 This is a schematic diagram of the combined cabinet of this utility model.

[0031] Figure 6 This is a structural schematic diagram of the frame module for installing the static changeover switch according to this utility model.

[0032] Figure 7 This is a schematic diagram of the individual wiring of the static changeover switch of this utility model.

[0033] Figure 8 This is a schematic diagram of the static transfer switch stacking and parallel operation according to this utility model.

[0034] Figure 9 This is a schematic diagram of the horizontal parallel operation of the static transfer switch of this utility model.

[0035] In the diagram, 100 is the frame module; 110 is the receiving cavity; 111 is the top plate; 112 is the cabinet door; 113 is the side plate; 120 is the second connecting part; 130 is the first connecting part; 140 is the connecting hole; 141 is the screw; 150 is the column; 160 is the crossbeam; 170 is the reinforcing member; 180 is the cable hole; 181 is the closed surface; 190 is the slide rail; 200 is the functional module; and 300 is the cabinet. Detailed Implementation

[0036] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0037] like Figures 1 to 9 As shown, a modular housing includes: a frame module 100, which has a receiving cavity 110 for accommodating a functional module 200; a first connecting portion 130 is provided at the top of the frame module 100; and a second connecting portion 120 is provided at the bottom of the frame module 100. The first connecting portion 130 and the second connecting portion 120 can form a complementary plug-in structure. One of the first connecting portion 130 and the second connecting portion 120 of the frame module 100 can be plugged into the other of the first connecting portion 130 and the second connecting portion 120 of another frame module 100, so that the frame module 100 can be detachably connected to another frame module 100.

[0038] The frame module 100 is the main structure housing the frame. Each frame module 100 is equipped with a receiving cavity 110 for placing the functional module 200. In the actual structure, the functional module 200 can be pre-assembled inside the frame module 100. After assembling multiple frame modules 100 together, the desired photovoltaic energy storage system can be obtained, which is very convenient. Since the first connecting part 130 and the second connecting part 120 can form a complementary plug-in structure, the top of one frame module 100 (first connecting part 130) can directly connect to the bottom of another frame module 100 (second connecting part 120), achieving a stable and convenient connection. This design allows for quick connection and disassembly between different frame modules 100.

[0039] The housing is designed as a modular structure that can be spliced ​​together. Multiple housings can be spliced ​​together to form a cabinet 300. The cabinet 300 can be equipped with / disassembled housings as needed, allowing the various functional modules 200 in the photovoltaic energy storage system to be freely combined, which greatly improves the flexibility of the photovoltaic energy storage system.

[0040] It should be further noted that the functional module 200 is one of a static transfer switch, a maximum power point tracker, and an energy storage converter, and the size of the housing cavity 110 is set to match the size of the functional module 200.

[0041] Static transfer switches (STS) provide fast, seamless switching between two power sources, ensuring continuous power supply to the load. Maximum power point trackers (MPPTs) adjust the input voltage in real time to find the maximum power point of the photovoltaic panels, thereby improving the overall energy harvesting efficiency of the system. Storage converters (PCS) are one of the core devices in an energy storage system, primarily used for bidirectional energy conversion and regulation. Their core function is to connect the energy storage battery (or photovoltaic panel) to the grid / load, ensuring efficient and stable energy conversion between direct current (DC) and alternating current (AC), thus supporting the charge / discharge control and energy management of the energy storage system.

[0042] This solution utilizes a modularly designed frame module 100 to enable the free combination and flexible configuration of key functional modules 200 (such as static transfer switch STS, maximum power point tracker MPPT, and energy storage converter PCS) in the photovoltaic energy storage system. Each frame module 100 can precisely accommodate a specific functional module 200, and rapid assembly is achieved through complementary plug-in structures at the top and bottom, thus facilitating the assembly of a complete energy storage cabinet 300.

[0043] For example, by connecting multiple 100kW PCS units in parallel, the total power output can be easily expanded to 500kW. Simultaneously, a single 500kW STS can support up to five PCS units, meeting high-power demand scenarios. Furthermore, each PCS can be paired with a battery pack and MPPT unit, forming an efficient energy management chain. The core advantage of this design lies in its ability to flexibly combine PCS and STS, or PCS, STS, and MPPT, according to actual needs, providing great convenience and adaptability for diverse configurations of photovoltaic energy storage systems.

[0044] like Figures 5 to 9 As shown, based on the above embodiment, the frame module 100 adapted to the static transfer switch includes a top plate 111, a cabinet door 112, and two side plates 113. The top plate 111 and both side plates 113 are provided with cable passage holes 180, each containing a removable or breakable sealing surface 181. The cable passage hole 180 can be exposed by removing or breaking the sealing door, allowing cables to pass through and connect to the copper busbar on the static transfer switch.

[0045] The reason for providing cable passage holes 180 on the top plate 111 and the two side plates 113 is to allow cables to pass through the sides and top of the frame module 100 as needed, so that the static transfer switch can be wired individually, or multiple static transfer switches can be stacked and operated in parallel or horizontally.

[0046] like Figure 1 , Figure 6 As shown, based on the above embodiment, a slide rail 190 is provided in the receiving cavity 110 of the frame module 100 adapted to the static changeover switch. The slide rail 190 is located higher than the bottom plate and is used to support the static changeover switch. The slide rail 190 is higher than the bottom of the frame module 100, which means that when the frame module 100 is used alone, the slide rail 190 supports the bottom of the static changeover switch, so that the static changeover switch is located at a certain height, thereby playing a waterproof role.

[0047] like Figures 1 to 4As shown, based on the above embodiment, one of the first connecting part 130 and the second connecting part 120 is provided with a plug groove and the other is provided with a plug connector, the outline shape of the plug connector being adapted to the shape of the plug groove.

[0048] This design ensures a quick and stable connection between the frame modules 100 through the tight fit between the grooves (plug slots) and the protrusions (plug connectors), while also providing good alignment accuracy and anti-slip performance. The plug connectors are typically designed with guide tapers or rounded corners for easy insertion into the plug slots.

[0049] In the actual structure, one frame module 100 can be connected to the first connecting part 130 (plug-in slot or connector) on the top of another frame module 100 via its second connecting part 120 (plug-in connector or connector) at the bottom. This method allows modules to be stacked vertically layer by layer to form a multi-layer structure. During installation, simply align the plug-in of the upper module with the connector of the lower module and gently insert it to complete the initial connection. The entire process requires no complicated tools and is simple and efficient.

[0050] Based on the above embodiments, both the first connecting part 130 and the second connecting part 120 are configured as tubular structures.

[0051] The first connecting part 130 serves as a plug groove, and the cavity inside the tube is designed as a groove with a certain depth and shape, while the second connecting part 120 is designed as a matching tubular plug.

[0052] Based on the above embodiments, both the first connecting part 130 and the second connecting part 120 are provided with connecting holes 140 for screws 141 to pass through, and the first connecting part 130 and the second connecting part 120 can be fixedly connected by screws 141 when they form a plug-in structure.

[0053] Although the plug-in structure itself provides a basic mechanical connection, the plug-in structure cannot provide vertical locking, so the first connecting part 130 and the second connecting part 120 need to be fixed together by screws 141, so that the two frame modules 100 are completely fixed together.

[0054] like Figure 1 , Figure 2 As shown, based on the above implementation method, the frame module 100 includes two rectangular frames located on its two sides respectively. The rectangular frames include two columns 150 and two crossbeams 160. The two ends of one crossbeam 160 are connected to one end of the two columns 150 respectively, and the two ends of the other crossbeam 160 are connected to the other end of the two columns 150 respectively.

[0055] Two rectangular frames are located on the left and right sides of the frame module 100, respectively, and are connected together by connectors to form a complete three-dimensional frame, which is actually the skeleton structure of the frame module 100.

[0056] Based on the above implementation, in the frame module 100 adapted to the maximum power point tracker or energy storage converter, the two ends of the column 150 are respectively provided with a plug slot and a plug connector; in the frame module 100 adapted to the static transfer switch, each rectangular frame has three plug slots on one crossbeam 160 and two plug connectors on the other crossbeam 160.

[0057] In the frame module 100 adapted to a maximum power point tracker or energy storage converter, the column 150 has a much higher compressive strength in the axial direction than in other directions (such as the lateral or bending directions). Therefore, placing the connection at the upper and lower ends of the column 150 can fully utilize the mechanical properties of the column 150 and significantly improve the load-bearing capacity of the overall structure. This design is particularly suitable for scenarios that need to bear large weights. The axial force distribution avoids deformation or instability caused by lateral forces or bending moments, ensuring a more stable and reliable connection between modules.

[0058] like Figures 1 to 6 As shown, in the frame module 100 adapted to MPPT or PCS, each side has two insertion slots and two connectors at both the top and bottom. In the frame module 100 adapted to STS, each side has three insertion slots and two connectors at both the top and bottom. This design is primarily to allow for detachable connection between the frame module 100 adapted to STS and the frame module 100 adapted to MPPT or PCS.

[0059] For example, the STS-compatible frame module 100 has a connector slot A, a connector slot B, and a connector slot C. Connector slot A and connector slot B can be connected to two connectors on a frame module 100 compatible with MPPT or PCS, respectively. Connector slot A and connector slot C can be connected to two connectors on another STS-compatible frame module 100.

[0060] Based on the above implementation method, the frame module 100 also includes a reinforcing member 170, which is inclined and whose two ends are fixedly connected to two adjacent columns 150 respectively.

[0061] By introducing reinforcing members 170 into the frame module 100, deformation of the three-dimensional frame can be effectively prevented, thereby enhancing the structural strength of the frame module 100.

[0062] like Figures 1 to 9As shown, based on the above embodiments, a combined cabinet for a photovoltaic energy storage system includes at least two connectable housing frames, and each frame module 100 is stacked and spliced ​​to form a cabinet 300; in two adjacent frame modules 100, one of the first connecting part 130 and the second connecting part 120 of one frame module 100 can be plugged into the other of the first connecting part 130 and the second connecting part 120 of the other frame module 100.

[0063] The modular cabinet consists of at least two modular storage racks, each of which (referred to as rack module 100) includes a specific first connecting part 130 and a second connecting part 120. Adjacent rack modules 100 can be stably connected through a complementary plug-in structure.

[0064] The modular design allows any individual frame module 100 to be independently disassembled and replaced. Users can adjust the capacity and functional configuration of the combined cabinet by simply adding or removing frame modules 100 according to actual needs. For example, when it is necessary to increase the total power of the energy storage system, simply add more frame modules 100 and then install the PCS (energy storage converter) within the housing cavity 110 of the frame module 100.

[0065] In photovoltaic energy storage systems, modular design enables the free combination and flexible configuration of key functional modules 200 (such as static transfer switches (STS), maximum power point trackers (MPPT), and energy storage converters (PCS). Each frame module 100 is precisely designed to adapt to specific functional modules 200, and utilizes complementary plug-in structures at the top and bottom for quick and stable assembly. This design allows multiple frame modules 100 to be easily assembled into a complete energy storage cabinet 300, meeting diverse system requirements.

[0066] In one embodiment, the cabinet 300 includes at least one frame module 100 for installing an energy storage converter, at least one frame module 100 for installing a static transfer switch, or at least one frame module 100 for installing a maximum power point tracker.

[0067] The width of the frame module 100 for the maximum power point tracker is equal to the width of the frame module 100 for the energy storage converter, and the height of the frame module 100 for the maximum power point tracker is less than the height of the frame module 100 for the energy storage converter.

[0068] Based on the above implementation, the width of the frame module 100 adapted to the static transfer switch is equal to the width of the frame module 100 adapted to the maximum power point tracker and the width of the frame module 100 adapted to the energy storage converter.

[0069] The length of the frame module 100 adapted to the static transfer switch is greater than the length of the frame module 100 adapted to the maximum power point tracker and the length of the frame module 100 adapted to the energy storage converter.

[0070] Based on the above implementation, the front column 150 of the frame module 100 adapted to the static changeover switch is offset rearward compared to the front columns 150 of the other frame modules 100. The frame module 100 adapted to the STS is offset rearward compared to the other frame modules 100, thereby reserving space for installing cabinet doors.

[0071] Based on the above implementation, the frame module 100 adapted to the static changeover switch is located on top of the other frame modules 100, and the rear of the frame module 100 adapted to the static changeover switch is suspended.

[0072] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0073] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0074] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0075] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A modular storage rack, characterized in that, include: A frame module (100) is provided with a receiving cavity (110) for accommodating a functional module (200). A first connecting part (130) is provided at the top of the frame module (100), and a second connecting part (120) is provided at the bottom of the frame module (100). The first connecting part (130) and the second connecting part (120) can form a complementary plug-in structure. One of the first connecting part (130) and the second connecting part (120) of the frame module (100) can be plugged into the other of the first connecting part (130) and the second connecting part (120) of another frame module (100), so that the frame module (100) can be detachably connected to another frame module (100).

2. The modular storage rack as described in claim 1, characterized in that: The functional module (200) is one of a static transfer switch, a maximum power point tracker, and an energy storage converter, and the size of the receiving cavity (110) is set to match the size of the functional module (200).

3. The modular storage rack as described in claim 2, characterized in that: The frame module (100) adapted to the static changeover switch includes a top plate (111), a cabinet door (112), and two side plates (113). The top plate (111) and the two side plates (113) are provided with wire holes (180), and the wire holes (180) are provided with detachable or breakable closed surfaces (181).

4. The modular storage rack as described in claim 3, characterized in that: A slide rail (190) is provided in the receiving cavity (110) of the frame module (100) adapted to the static changeover switch, and the slide rail (190) is located above the bottom of the frame module (100).

5. A modular storage rack as described in claim 2, characterized in that: One of the first connecting portion (130) and the second connecting portion (120) is configured as a plug groove and the other is configured as a plug connector, the outline shape of the plug connector being adapted to the shape of the plug groove.

6. The modular storage rack as described in claim 5, characterized in that: Both the first connecting part (130) and the second connecting part (120) are configured as tubular structures. Both the first connecting part (130) and the second connecting part (120) have connecting holes (140) for screws (141) to pass through on their tube walls. When the first connecting part (130) and the second connecting part (120) form a plug-in structure, they can be fixedly connected by screws (141).

7. A modular storage rack as described in claim 5, characterized in that: The frame module (100) includes two rectangular frames located on its two sides. The rectangular frames include two columns (150) and two beams (160). The two ends of one beam (160) are connected to one end of the two columns (150), and the two ends of the other beam (160) are connected to the other end of the two columns (150).

8. The modular storage rack as described in claim 7, characterized in that: In the frame module (100) adapted to the maximum power point tracker or the energy storage converter, the two ends of the column (150) are respectively provided with the plug slot and the plug connector; in the frame module (100) adapted to the static transfer switch, each of the rectangular frames has three plug slots on one of the crossbeams (160) and two plug connectors on the other crossbeam (160).

9. A modular storage rack as described in claim 7, characterized in that: The frame module (100) also includes a reinforcing member (170), which is inclined and whose two ends are fixedly connected to two adjacent columns (150).

10. A combined cabinet for a photovoltaic energy storage system, characterized in that, It includes at least two modular storage racks as described in any one of claims 1 to 9, wherein the rack modules (100) are stacked and assembled to form a cabinet (300); in two adjacent rack modules (100), one of the first connecting portion (130) and the second connecting portion (120) of one rack module (100) can be inserted into the other of the first connecting portion (130) and the second connecting portion (120) of the other rack module (100).

11. A combined cabinet for a photovoltaic energy storage system as described in claim 10, characterized in that: The cabinet (300) includes at least one frame module (100) for installing an energy storage converter, at least one frame module (100) for installing a static transfer switch, or at least one frame module (100) for installing a maximum power point tracker.

12. A combined cabinet for a photovoltaic energy storage system as described in claim 11, characterized in that: The width of the frame module (100) adapted to the maximum power point tracker is equal to the width of the frame module (100) adapted to the energy storage converter, and the height of the frame module (100) adapted to the maximum power point tracker is less than the height of the frame module (100) adapted to the energy storage converter.

13. A combined cabinet for a photovoltaic energy storage system as described in claim 11, characterized in that: The width of the frame module (100) adapted to the static transfer switch is equal to the width of the frame module (100) adapted to the maximum power point tracker and the width of the frame module (100) adapted to the energy storage converter. The length of the frame module (100) adapted to the static transfer switch is greater than the length of the frame module (100) adapted to the maximum power point tracker and the length of the frame module (100) adapted to the energy storage converter.

14. A combined cabinet for a photovoltaic energy storage system as described in claim 11, characterized in that: The front column (150) of the frame module (100) adapted to the static changeover switch is offset backward relative to the front columns (150) of the other frame modules (100).

15. A combined cabinet for a photovoltaic energy storage system as described in claim 11, characterized in that: The frame module (100) that adapts to the static changeover switch is located on top of the other frame modules (100), and the rear of the frame module (100) that adapts to the static changeover switch is suspended.

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