Below are the common solar inverter failure causes and ways to avoid them — Poor inverter ventilation, Inverter grid fault, faulty inverter MPPT, Inverter capacitor failure, Excess humidity, Poor inverter maintenance. Last Updated on May 20, 2025 by CarolineReasons for photovoltaic inverter deacti a solar system that is no longer functioning. However,it's also important to know how ou can protect the system from future failure. Check out these 6 cause of. For many homeowners and system owners, inverter shutting down feels sudden, confusing, and sometimes even alarming. It will turn off automatically if it goes over that threshold. Overloading Inverter overload is the number one reason it shuts down. Other possible reasons are incorrect parameters, lack of power and damaged circuits. Let us take a look at the.