Frequency converter solar container capacitor failure

Electrolytic capacitors in variable frequency inverters often fail due to overvoltage, overheating, poor-quality components, or incorrect installation, which results in reduced VFD efficiency, system instability, and potential equipment shutdown. Capacitors on PV ends to resolve fluctuation? We struggled for 3 weeks at least trying to troubleshoot the reason why watts on PV output fluctuates drastically during load. During high load, i can see PV power on the 3 inverters fluctuates, 3300w suddenly drops down to 200w for 3 seconds and then. There are otherwise quite a few problems that may arise and lead to inverter failure. I’m facing a recurring issue with a single-phase capacitor-run pump installed at a client's site. The pump is connected to a pressure controller, and within one month, we’ve had three breakdowns, each caused by a damaged capacitor. These failures may stem from environmental factors (extreme temperature, humidity, dust), electrical stress (voltage fluctuations, lightning), manufacturing defects, or natural component aging.