I have a new Quattro that has 0 DC amps at all times. AC output only works when I have an AC input (generator connected to AC1). It detects the batteries and their voltage, but will not charge or pull power from them. It says inverting when there's no AC input, but then says there's no AC load to power. I've checked all the current settings in VE Connect & Configure, nothing seems to make a difference. Recommendations on settings to check? Or might it be a mechanical failure?