Disclosed is a photovoltaic air conditioning system, which includes a photovoltaic cell array; an air conditioning unit, comprising a first cabinet, a first inverter module and a variable frequency compressor, wherein the first inverter module and the variable frequency compressor are installed in the first cabinet, and the first inverter module is configured to supply power to the variable frequency compressor; a current conversion unit, comprising a second cabinet, a rectifier module and a second inverter module, wherein the second cabinet resides outside of the first cabinet, the rectifier module and the second inverter module are installed in the second cabinet.

The present disclosure provides a photoelectric conversion element including a first electrode 3, a second electrode 7, a photoelectric conversion layer 5 between the first electrode 3 and the second electrode 7, and a reflection layer 6 between one of the first electrode 3 and the second electrode 7 and the photoelectric conversion layer 5. The wavelength at which the reflectance of the reflection layer 6 is maximum in the visible region is within the range of wavelengths in which the optical absorption coefficient of the photoelectric conversion layer 5 is ⅕ or more of the maximum optical absorption coefficient in the visible region.

The present disclosure provides a photoelectric conversion element including a first electrode 3, a second electrode 7, a photoelectric conversion layer 5 between the first electrode 3 and the second electrode 7, and a reflection layer 6 between one of the first electrode 3 and the second electrode 7 and the photoelectric conversion layer 5. The wavelength at which the reflectance of the reflection layer 6 is maximum in the visible region is within the range of wavelengths in which the optical absorption coefficient of the photoelectric conversion layer 5 is ⅕ or more of the maximum optical absorption coefficient in the visible region.

A photovoltaic system includes a controller and plurality of photovoltaic strings that are independently controlled. The controller enables some photovoltaic strings to be in a maximum power point tracking state, and the remaining photovoltaic strings to be in a power output limited state. The system implements maximum power point tracking detection so that the maximum power point power and the maximum power point voltage are updated in real time. Further, the working status of the power supply system can be fed back in real time, so that the photovoltaic system can predict the capacity of an energy storage apparatus or regulate charging and discharging of the energy storage apparatus. After a curtailment state ends, the photovoltaic system is relatively quickly restored to the normal working state, so that a loss of generated power is reduced.

A photovoltaic system includes a controller and plurality of photovoltaic strings that are independently controlled. The controller enables some photovoltaic strings to be in a maximum power point tracking state, and the remaining photovoltaic strings to be in a power output limited state. The system implements maximum power point tracking detection so that the maximum power point power and the maximum power point voltage are updated in real time. Further, the working status of the power supply system can be fed back in real time, so that the photovoltaic system can predict the capacity of an energy storage apparatus or regulate charging and discharging of the energy storage apparatus. After a curtailment state ends, the photovoltaic system is relatively quickly restored to the normal working state, so that a loss of generated power is reduced.

A cost-effective solar energy collection system, including: 1) new solar PV panel wiring and power conversion system designed to allow tracking panel-to-panel shading while maintaining maximized power output, 2) the companion new combined structural and electrical inter-panel connector system supporting the new wiring scheme, and 3) the new panel structural support for the new inter-panel connector system, 4) the robotic array assembly and installation system used to assemble the new inter-panel connector and new panel structural support system into solar array sections in the field with a robotic crawler to move the assembled solar array sections to their final positions, and 5) the post system and installer for supporting the solar array sections. It is a fully integrated solar energy system for rapid installation and higher energy output which together creates a transformative change for the solar energy field.

A cost-effective solar energy collection system, including: 1) new solar PV panel wiring and power conversion system designed to allow tracking panel-to-panel shading while maintaining maximized power output, 2) the companion new combined structural and electrical inter-panel connector system supporting the new wiring scheme, and 3) the new panel structural support for the new inter-panel connector system, 4) the robotic array assembly and installation system used to assemble the new inter-panel connector and new panel structural support system into solar array sections in the field with a robotic crawler to move the assembled solar array sections to their final positions, and 5) the post system and installer for supporting the solar array sections. It is a fully integrated solar energy system for rapid installation and higher energy output which together creates a transformative change for the solar energy field.

A method for rectifying degradation of a photovoltaic module in a photovoltaic power system, includes: controlling a to-be-rectified photovoltaic module in a photovoltaic power system to stop outputting; and then injecting a rectification current into a positive or negative electrode of the to-be-rectified photovoltaic module.

A method for rectifying degradation of a photovoltaic module in a photovoltaic power system, includes: controlling a to-be-rectified photovoltaic module in a photovoltaic power system to stop outputting; and then injecting a rectification current into a positive or negative electrode of the to-be-rectified photovoltaic module.

Embodiments of this application disclose a fault point position determining method and apparatus and a photovoltaic system, to correctly and efficiently determine a fault point position when a disconnection fault occurs in a photovoltaic system. The method is applied to a photovoltaic system, the photovoltaic system includes at least one inverter and at least one photovoltaic unit, each photovoltaic unit includes at least one photovoltaic module and one photovoltaic module controller, and the method includes: sending, by an inverter, a first test signal to the at least one photovoltaic unit; obtaining, by the inverter, first test signal characteristic information fed back by the at least one photovoltaic unit; and performing, by the inverter, absolute value or relative value sorting on the at least one piece of first test signal characteristic information, and determining a fault point in the photovoltaic system based on a sorting result.