Just installed a multiplus 3000/120A. It appears to charge fine on the charge only setting. As soon as I select the inverter on button, it get super noisy and starts draining the 3 AGM battery bank it's connected to. To try and eliminate certain things, I manually tried turning off every 110V breaker individually to see if it made a differrence, nothing. I turned the main breraker from the inverter to the load and still no change in noice. Is it possible there's something going on internally and causing some kind of internal draw?
