Several common faults and solutions for PV systems

There are many factors affecting the output power of PV power plant, including the amount of solar radiation, the tilt angle of solar cell modules, dust and shadow blocking, and the temperature characteristics of the modules.
The common solutions for low system power due to improper system configuration and installation are:
 Before installation, test each module for sufficient power.
 Adjust the mounting angle and orientation of the modules.
 Check the components for shadows and dust.
 Check if the voltage is within the voltage range after the components are connected in series, too low voltage will reduce the system efficiency.
 Before installing multi-way string, check the open circuit voltage of each string, the difference is not more than 5V, if you find the voltage is not right, check the line and connectors.
 installation can be accessed in batches, each group of access to record the power of each group, the power difference between the strings does not exceed 2%.
 The installation place is not well ventilated, and the inverter heat is not spread out in time, or exposed to the sun directly, causing the inverter temperature to be too high.
 inverter has double MPPT access, each way input power is only 50% of the total power, in principle, each way design installation power should be equal, if only connected to one way MPPT terminal output power will be cut in half.
 cable joints poor contact, cable is too long wire diameter is too thin have voltage loss finally caused by power loss.
 PV plant grid-connected AC switch capacity is too small to meet the inverter output requirements.