Thanks to all of you! I didn't think to ask specifics about the inverter during our walk-thru.
I especially like Dougburi's answer.
I got the 'green' light on the house control panel and tried two outlets a few weeks ago and nothing. I've since learned with the user manual there is a switch on the actual inverter in the storage bay. Maybe it's not turned on???
Never-the-less, you all have been a real help and I'll put these ideas to the test.