Dales question ties in with my question (which wasn't answered) . Is there some switch setting or what provisions must one make to leave the bus without electrical connection in freezing weather for one or two weeks. Can the bus take care of itself? That is turning on the generator and or the webasto (if thats what its for) or any other combination of components to maintain a safe temperature for the water? This would be for example if you were in Quebec in Feb. and you had to leave the bus to fly to Libya to meet Jerry W. for a cookout.