Design and installation problems
① The number or type of photovoltaic modules connected to the same MPPT is inconsistent. Due to the “barrel benefit”, the MPPT of this road operates at the lowest photovoltaic string voltage, resulting in a decrease in power generation.
Solution: Check the voltage of the strings connected to the inverter, and connect photovoltaic modules of the same model, orientation, angle, and quantity to the same MPPT of the inverter.
②The maximum current of the photovoltaic module is higher than the maximum DC input current of the inverter, which causes the current limit operation of the DC input side of the inverter, and the operating power is lower than the reasonable power of the photovoltaic system.
Solution: For high-current components, string inverters compatible with high-current input can be used, and if the current permits, they can be properly configured and installed to reduce the number of strings connected to each MPPT.
③The working environment temperature of the inverter is too high or there is no ventilation. temperature drop.
Solution: The inverter should be installed in a well-ventilated area, and prevent the cooling air duct of the inverter from being blocked. It is recommended to install a sunshade above the inverter to avoid direct sunlight and help reduce the temperature of its working environment.