1. check and understａnd the operation records, analyze the operation of the photovoltaic system, make a judgment on the operation status of the photovoltaic system, and perform maintenance immediately if any problems are found.
2. the appearance inspection and internal inspection of the equipment mainly involve moving and connecting some wires, especially the wires with high current density, power devices, and places that are easy to rust.
3. for the inverter, clean the cooling fan regularly and check whether it is normal, remove the dust in the machine regularly, check whether the terminal screws are tight, check whether there are traces and damaged components left after overheating, and check whether the wires are aging.
4. regularly check and maintain the relative density of battery electrolyte, and replace damaged batteries in time.
5. when possible, infrared detection can be used to inspect the photovoltaic power generation array, wiring and electrical equipment to find out abnormal heating and fault points, and solve them in time.
6. the photovoltaic power generation system should be checked and tested for the insulation resistance and grounding resistance of the system every year, and the power quality and protection function of the whole project should be checked and tested for the inverter control device. all records, especially the inspection records, should be properly archived. custody.