Thanks for the info!!! I'm gona go with the largest deep cycle battery I can fit behind the wheel well on the passengers side. Space inside this camper is very limited , so I got to do the potty. Since I have plenty of real estate on the roof I'm going with 200 watts of solar minimum. I want to keep the camper seperate from the truck. It's a safety concern for me , truck being able to start anytime is paramount. Btw if anyone has questions about the turbokool units , ask me. My profile shows me in s tx. I been in Deming nm for years now. I have two of them on my 38 foot dielser pusher I live in full time , last thurs 108 fri 112.5. Hotter than hell , roof top a/c could not even keep up so I used them never got over 82 degrees.