I have a 2016 Fleetwood Storm 32H that has a constant drain on the chasis battery.  After about 3 days it won't start and the battery only reads about 10 volts. It has been in the shop since the first of the year and still no answers.  Dose anyone else out there have a similar issue. 

We had this issue with our house batteries. The connect 

/disconnect solinoid was not being disabled. It was stuck in the engaged state. Bought a replacement on  eBay issue resolved

Anonymous wrote:

we have a 2016 excursion and are having the same problem, not fixed yet but tech thinks we have a bad solenoid. It is irritating having to keep a battery charger hooked up, even when we are plugged into shore power. The charger aspect of the Inverter/Charger is not getting to chassis batteries, house batteries are fine. Also Trying to determine what is draining the chassis batteries. Hope to have fixed next week, will report back.

I have the same problem but I installed a remote battery disconnect switch which has an on/off remote that I keep on my keychain. I took it to Decatur and they sent it to the Ford dealer there in town and they couldnt fix it our didnt know what was causing it.