I was unable to hold a charge on a brand new battery. I couldn’t figure out what was draining the power created by my Escape installed solar panel. Finally, I saw that the tiny on off button on my Weingard Roadstar TV amplifier was depressed. It was constantly trying to get a signal and wore down the battery. I turned it off and problem solved.
That’s the one! Funny thing is, we’ve never had a TV in the trailer so I kind of forgot about it. It’s an all black switch, under the rear permanently installed bed. The actual switch is smaller than a wood match stick. It can only be seen by crawling on my hands and knees with a flashlight.