Houstin, you have a problem. Your charging system is not working. Based on your comment about it being plugged in you should have at least one bank fully charged even if you don't have a device to charge the second one,.
Need to find out why it is not charging.
Is this rv new to you? Time to spend some time learning how the systems work. It took me a year to get really comfortable with mine and I am an ET (electronic tech) and have owned many rv's. None so complicated as these beasts.
Take a picture of your batteries if possible and post. Those terminals must be shiny clean and tight as a ducks. (water tight south end).
Follow your negative leads from your batteries and take the bolts loose and clean the area shiny clean. A dremel with a round barrel sanding disk works like a dream.
Before doing this maintenance use your voltmeter probes on the centers of the battery posts versus touching the clamps. Write this information down because you will forget it or become less sure of your before and after readings.
Myron & Deborah
08 HR Endeavor 40 SKQ
2012 Ford Edge Limited FWD 3.5L
Aluminator tow bar, Demco base plate