Tank heating pads

[bobkat21]

We have a 2002 Aerolite Cub C236 and I use it pretty much year round. We live in Georgia and I keep it at my hunting club for the duration of deer season. At times it will get below freezing, example it got down to 15 degrees and never warmed up above 30 degrees all weekend. I had drained all the water out of the trailer except for what is in the black tank. I opened and drained all the outside drains and keep heater set to come on at 40 degrees. We can let our gray tanks drain out on the ground so it stays empty plus all it is used for is to dump dishwater out. I have read about the tank heating pads and was wondering if it would be something that would benefit us since it said they could also be used on the fresh water tank. This would really be good because then I wouldn't have to carry water all the time and we could even shower if we wanted. Any and all comments would be appreciated.

[Old-Biscuit]

How do you plan on powering them??

Some are 120V AC units
Some are 12V DC units

Pads are NOT to be ON if tank is empty.....heat from pad can damage tank w/o water to absorb heat generated.

Pads are thermostatically controlled.
Turn switch ON....when pad temp senses tank temp below 40*F it energizes heater pad. When tank temp rises above 60*F they shut down.