For inverter, it requires maintenance to extend its service life, such as keep the ventilation open, check the voltage and current, check cable connections and so on. There is an example that one of our customer, Mr W. Avery, after some certain adjustment of the voltage of inverter, the inverter in issue can be used normally again.
Mr. Avery bought the first "WZRELB Reliable 3000w Pure Sine Wave Solar Power Inverter" from us in March 2017. He used it for almost 7-years without any issues. Yes, if you purchase WZRELB inverters, and operate it normally, its service life can be very long.
https://www.powerreliable.com/600w-inverter/pure-sine-wave-inverter/inverter-3000-watt.html
Mr. Avery was very impressed with the longevity of this 3000W pure sine wave inverter ,however, since he switched to LiFeP04 batteries last year, the inverter started to have issues of shutting down when the voltage from the solar reached 27.1V. The reason of this situation maybe that the inverter was used so long that it had been a little old.
He knew that the high-voltage shutdown for this 24VDC power inverter is about 30V ,so Mr. Avery decided to give it a try. He adjusted the voltage to shut down at 30.1V again by replacing a resistor inside the inverter, finally, he fixed it. After running for 7-days, the voltage from his solar has reached 28.2 (his upper limit setting from solar) and has not shut down once.
Mr. Avery showed that this 3000W inverter with 7 years use also had an issue with putting out 126-130V. When he ran a 2,25cf refrigerators and a 12cf freezer . For Mr. Avery himself, although the inverter can run the refrigerator and freezer with 126-130v, he still felt much more comfortable with the stable output of 119V from this inverter. This maybe more safe and stable and the service life of the inverter would be more longer.
Therefore, if there is a deviation from the low-voltage shutdown value, high-voltage shutdown value, output voltage value, etc.after years of use, you can try to contact us to reset them. Yes,WZRELB pure sine wave inverter is equipped with this function,some parameters can be reset in a certain range at your end.
Regular maintenance for the inverter is indispensable. To guarantee steady system operation, you should periodically verify that the inverter's output voltage is within normal limits. Regularly check whether the cable connection is loose or disconnected to ensure that the cable connection is secure. At least once a year, the inverter should be fully inspected that covers the electrical connection, grounding dependability, and system operation status. It's necessary to do more regular maintenance inspections in some situations, such as hostile working environments or unstable system operation.