Holding tank heater question?

Sounds good guys and gals! Will leave them on just to be on the safe side!!! Thanks again!

I agree with all the others. Keep them on and make sure you leave some liquid in them at all time. I was told 30 percent by my dealer. But that seems a little much. But just dump and then run some water into each tank.

What Old-Biscuit said above is what my tank heater pads' instructions say: Do not leave them turned ON if the tank does not have some liquid in it.

12V tank heater pads require a lot of battery power but they do cycle ... so they're not supposed to be ON continuously. If drycamping in cold weather with the heaters ON watch your batteries's condition carefully, as you may not make it through the night. I wouldn't recommend using the 12V heaters withouut hookups if you don't have at least two good fully charged batteries in your rig starting each night. If it stays freezing throughout the day, plenty of solar or generator run-time probably will be required.

Most tank heater pads have thermostat controller....ON when temps drop below 45*F and OFF when temps reach 60*F

Do NOT leave on if tank is empty...needs liquids in tank to absorb the heat generated. Tank wall can be damaged if heater on and no liquids

The ones on your Rockwood are 12V DC so need to have rig plugged in OR battery on a charger

What brand of tank heaters? I'd ask whether there is a thermostat for the tank heaters.

Ours in a previous TT went off when it got warm and came back on when it got cold, we just left the switch on in the winter.

Maybe they are automatic after you turn them on like heat tape. We turned heat tape on and then it had a thermostat that would turn on/off at 38 degrees. If you can discover what brand/model they are, maybe you could find something online that would tell you if this is the case. We could have left our heat tape on all the time, even in the summer, but it wouldn't be heating if it were over 38 degrees. We have never had holding tank heaters though, so just guessing they may be set up the same kind of way.

That is why I am leaving it on. My memory isn't as good as it used to be. Just wondering if it will hurt anything.

If it were me, I would leave it on the whole winter.
I just know I would forget about it and bust a tank.