pianotuna wrote:
MDKMDK,
Any idea of the watts they draw?
Don, I have no idea. They're factory installs, but they had to be added by the Canadian dealer, after they received the unit from the factory. For reasons unknown, they could not be "factory installed" @ Winnebago. Cross border rules/regulations? Next time I'm under the vehicle, I'll see if I can see a label to identify them. My gray/black tanks are 36 gallons each, fwiw.
I did find a blog that discusses them in some detail, and mentions between 4A and 11A of current as a typical range. They link a couple of examples of after market add ons. Though they don't say, I'm assuming that's DC amps.
https://vancampinglife.com/when-should-i-turn-on-my-rv-tank-heaters/