I have 27ft Arctic Fox, and when I leave the trailer to hunt
I leave the heat main heater on 55-60 degrees. That keeps
the interior of the trailer warm and also blows hot air to the
sealed underbelly to keep the tanks from freezing. If I,m
not plugged in to another power source, I charge my golf
cart batteries when I get back in from hunting. Heating
systems do kill batteries.