We have a 2010 Itasca Suncrusier on a W22 WORKHORSE chassis. We had new coach and chassis batteries installed in July. The coach worked fine then all of a sudden there was no battery power to the coach. We decided to take a short trip last week w/o 12v power. No problem on trip to the campground. When we started home I started the coach to put in slides and jacks up with no problem. I turned off coach to unhook utilities, etc. Went to start the coach to leave and there was no battery power at all. After about 10 minutes trying to figure something out all of a sudden both the coach and chassis batteries began to work. Got home fine and parked the coach in our driveway. After a few days went out to move the coach and there was no battery power again. After a few minutes the batteries kicked in and the coach started right up. Anyone got a clue what's going on with the battery power???