What brand-volt holding tank heater have you bought?

The Ultra pads are available as both a 12VDC/120VAC units. Why limit yourself when you can have a pad that will do both??

As the pads are thermostatically controlled draw will depend how much they are on. Outside temp, covered/insulated under belly, wind and if you have forced air belly heating will affect how often they cycle.

Ultraheat Tank Heaters