- Oct 8, 2016
So i've had my mppsolar inverter for about 3 years now, it's already gone through one mainboard replacement. Functionally it's inverting and charging batteries still, however, I've noticed that the relay that turns on and off the solar charging will get stuck to the on position. It's also noticeably quieter when it snaps on/off. While the sun is still out i can throw the breaker and i hear it turn off, but after sun set and sometimes for quite a while it stays on and i'm not sure what all negative impact it has. I haven't really tested this with an amp meter, but the watchpower shows 3-4 amps of charging (80 to 120watts) or so of solar charging even after the sun is completely down. I'm just wondering if anyone else has seen this happen, i haven't seen any results from searches. I am one of the first purchases though of the 120v model, bought only a month or so after release. I think the solar charging is the board at the top of the inverter, separate from the mainboard so it's original. Thinking about just buying a solar charge controller, and not use the solar charging on the mpp.