Anything I leave outside of truck can be a blob of ice in the morning. I want it to be reliable and zero attention, basically. For example, last time I was in the woods, I left folding chairs outside, just folded them down and leaned against the truck, and they happened to be fully soaked and frozen all through by the morning, even that the evening weather was dry.
Another example, the truck in the morning. It was clean in the evening. The heater setup would look something like that.
View attachment 4067119
Have been using my heater in garage for about 40 hours now. It seems that the foul odor was coming from the cheap Chinese plastic, as I smell nothing now. Of course, don't have any smell left after engine and transmission rebuilds, plus couple of COVIDS, but it is almost perfect for me now. I'll have a second opinion on reintegrating that heater into the truck.
5KW heater uses 3.6A at full power, btw. Just in case anyone is planning a battery capacity.