I just wanted to see if there are any good solutions out there for leaving a pet in a car/rig. I'm in the process of finding a new van, and i want to see if theres anyway to heat or cool it while im away for a little while, say biking or skiing for the day. I'm planning to turn whatever I get into a westfalia style camper, and want to factor this into the cost. Any ways to heat and AC running of battery power, maybe run a generator? i havent found any real solutions out there.