Our '02 GT 325 has the "Artic Pack". To a Brit like me, an "artic" is an 18-wheeler, abbreviated from "articulated lorry". Fortunately, the documentation I got with the purchase included one on the Arctic Pack (at least the manufacturer knows the correct spelling!)
The heating pads are 12VDC. The size and number installed depends on the size of the tank. My 325 has 2 pads on each tank. Since the MH is at a consignment dealer's lot, along with the documentation, I'm going from memory, but I think the current draw is 7 amps per pad.
The FW tank is inside the living area, so is not heated. Pads are installed on the grey and black tanks. As I remember, the built-in thermostat turns the heaters on at 40 F. This seems reasonable because of the amount of waste a full tank can hold. What I think is unreasonable is the shut-off temperature (either 60 or 65F). I can't see using 14 amps of battery power to heat sewage to 60F and the same for grey water. Unfortunately, the t/stats are built in and non-adjustable.
My other concern is that the system doesn't seem to have a mechanism to check there's anything in the tanks. Hitting an empty, relatively thin-wall, plastic tank with an uncontrolled 84 watts over a small area (the elements look like they're maybe 8" x 4") may melt the plastic before the t/stat shuts it off.
I concluded that the negatives far outweighed the positives and we've never used the system.
Frank and Eileen
No longer RVers or FR owners