1. DC-side system efficiency Power stations adopt different installation methods, and the DC-side loss is greatly different in distributed photovoltaic power stations. The modules are connected to the inverter through direct current In centralized ground power station, due to the long DC cable, the energy radiated from the sun to photovoltaic modules must go through DC cable bus-box, DC distribution cabinet and other equipment. The efficiency of the DC side system is usually about 90% 2. The maximum power of the rated output of the inverter is not invariable. When the voltage of the grid drops, the inverter cannot reach the rated power For example, the 33KW inverter, the maximum output current is 48A, the rated power is 33KW, the rated output voltage is 400V power,48A*400V*1.732= 33.KW, if the grid voltage drops to 360V, then the inverter output power is 48A*360V*1.732= 30.KW 3. The installation position of the photovoltaic inverter is required. Generally, it should be selected in the place with good ventilation and no direct sunlight. If the above installation conditions cannot be met, the problem of reducing the amount of electricity should be considered, and the components must be matched less

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