If you want to run water in the winter without a 4 season camper, this is the product you want to look into:
https://www.ultraheat.com/ultraheat-rv-tank-heaters
They make various sizes and applications from tank warmers to pipe warmers to gate valve heaters.
The trick is the larger the size, the more amps they draw when in operation. With my 320w solar setup and 255 AH reserve capacity I would probably be able to run one of their pads on the tank all day if it wasn't snowing, easier if you're just a weekend warrior because you can just let the batteries charge back up over the work week.
I found that for the most part my water wouldn't freeze during the day while I was away, and at night the heater was on which kept most things warm, I never did run camper water in the winter though. In a rig with a shower and a toilet the shear amount of piping is the limiting factor on knowing whether you can get away with it, add a hot water heater for a shower, and wow, that's a lot of water to worry about, and the aforementioned dumping issue.
If most of your piping can be kept warm by the heater at night then I would add a heat pad for driving and go for it, just make sure your lines are drained, also your drain traps.
Possibly add a shut off at the tank, and pull the low point drain to the faucet and toilet (sorry shower people) before moving, or extended freezing conditions? With a heat pad that will keep your water warm until you can heat the living space again.
Another possible option would be to put a 120V pad on your black tank, and run your black into it and let it freeze until you got home, then plug in your tank heater to unfreeze it then go dump, would depend on your piping setup though, but would save a lot of power from your battery bank.
Bookmarks