While plugged into shore power, battery charge indicator on panel inside door shows 4 red lights, which I assume means it is fully charged. When we disconnect from shore power, we get no power to the tab from battery and no lights on indicator panel. Tab is sitting in driveway, not connected to vehicle. Thoughts? I have checked with battery switch both in online and offline position. I contacted my dealer this morning via text, but thought the wise ones here at the forum might provide a quicker response on this Sunday morning. By the way, we are not sure it was ever operable by battery, we have not camped in it yet.