First, regular inspection and maintenance
Inspection of appearance and connection parts
Regularly check the appearance of the solar inverter to see whether the shell is damaged, deformed, corrosion and other phenomena. If the shell is damaged, it may cause moisture and dust to enter the inside of the pure sine wave inverter, affecting its normal operation. At the same time, check whether the input and output cables of the inverter are firmly connected and whether there are signs of loosening, oxidation or overheating discoloration. For example, if the cable connection terminal is loose, it will increase the contact resistance, cause heat, further affect the efficiency of power transmission, and may even cause safety accidents such as fire. For the connection part, it should be tightened regularly with tools, and check whether it needs to be cleaned or anti-corrosion treatment to ensure that the connection is reliable and safe.

Cooling system maintenance
The cooling system is essential for the stable operation of the solar inverter and therefore requires regular maintenance. For inverters with forced air cooling, check whether the fan is operating normally and whether there is abnormal noise or vibration. If the fan is damaged, replace it in time to prevent heat dissipation. Clean dust and debris from fan blades and heat sinks to ensure proper ventilation. For example, in a dusty environment, the radiator may be blocked by dust, reducing the heat dissipation efficiency and increasing the internal temperature of the inverter. It is generally recommended to clean and inspect the cooling system every 3-6 months. For the liquid cooling system, it is necessary to check the coolant level, pH and leakage to ensure that the coolant is within the normal working range, and the cooling pipeline is firmly connected without leakage. If the coolant is found to be insufficient or deteriorated, it should be supplemented or replaced in time.

2. Troubleshooting methods and countermeasures
Common fault phenomena and cause analysis
When the solar home storage inverter fails, we must first observe the fault phenomenon. If the inverter display displays the fault code, locate the fault according to the inverter manual. For example, the display of an overvoltage fault code may be that the solar panel output voltage is too high,which may be caused by a sudden increase in light intensity or too many panels in series; Indicates an overcurrent fault, which may be a short circuit or overload of the load, or the power module inside the solar inverter system is damaged. If the inverter has no output, it may be the input circuit fault, such as the fuse is blown, the DC contactor is not closed, etc., it may also be the inverter circuit fault, such as power semiconductor device damage, drive circuit abnormalities, etc. In addition, if there is abnormal noise or serious heating when the inverter is working, it may be a cooling system failure, fan damage or internal circuit short circuit phenomenon.Emergency treatment and professional maintenance

Correct daily maintenance and troubleshooting are essential to extend the service life of solar inverters and ensure the stable operation of solar power generation systems. Only by mastering these points can users discover and solve problems in time, so that the solar inverter can play a better role and improve the power generation efficiency and reliability of the solar power generation system.

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