I also think the inverter is broken, but Signature keeps giving me the run-around. By battery off, I'm referring to pressing the tiny on/off button. I have also tried flipping the breaker on the battery, with the same result - the house runs fine with no battery, and like garbage with battery...
I have a couple of issues with my new system, which Signature hasn't been able to resolve yet. Looking for some outside assistance:
1) with batteries on, our house has many weird electrical issues.
a) GFCI outlet in a bathroom randomly clicks repeatedly, very loudly. (I've never heard a GFCI...