[RMcNeal]

In addition to what Carl said, mine has the inverter in the basement ceiling on the ODS side. Right next to the inverter there is an auto transfer switch with a cord and plug plugged into the inverter. Check that this switch has 120v when on shore power. If not, then the inverter should kick in using the batteries to supply power. My transfer switch was bad when new. Dealer replaced both transfer switch and inverter, as the parts changers couldn't figure out the problem.