My battery was bad too, brand new, was showing "red" in the eye of the factory Ford battery and would drop to less than 12 volts after a week.. I just went and bought a new battery. My dealer said to take the coach to Ford and they would replace it, but it wasn't worth the hassle. I picked up a better battery with a higher rating from Wally World and put it in.
Go check the battery in the coach too, there's a chance that it may be weak too.
2019 Redhawk 24B