More dumb questions! I'm a novice. So I have the legacy II, 2020. I put 4 new interstates in it. Now that I am back in my barn and plugged in to shore power. everything is working! A/C, batteries got restored, outlets working gfi ,yes! So I think my portable Generator 30 amp plug was not working? battery drained after 2 days . here is my questions. Do the outlets in the RV work on battery power only? I thought so, and That may have been my first misdirection... Do I have an Invertor? What is the Black box mounted on the inside compartment under the table? Looks like an invertor.