Ultraheat Tank Heater Pad Issue
My converter fan is running continuously when I switch on my 2 forward UltraheatTH-624 heat pads. When only middle TH-1218Ultraheat and rear TH-624Ultraheat heat pads are on the inverter fan does not ...
Forum Discussion
Your 12 volt powered tank heat pads probably draw from between 4 to 12 amps (depending upon the size of your pads) when cycled ON. See their website here: https://www.ultraheat.com/ultraheat-rv-tank-heaters
However of course, they're not ON drawing battery power full-time in cold outside air temperatures - they cycle ON and OFF keeping the tank wall at an average above-freezing temperature during cold weather - so the current they pull from your batteries per hour is not the constant amount shown in the UltraHeat website specifications. Due to their ON and OFF cycling, the average current drawn per hour will be less than what the specifications show on the website.
With plenty of solar power and daily sun or with daily generator runs - to recharge coach batteries - you should be able to keep your tanks from freezing when drycamping in cold outside air temperatures.
Use of these pads seems like a no-brainer to me as compared to messing around with anti-freeze in the tanks, or worse yet ... not using RV tanks and their plumbing during cold weather. We've had the 12 volt version of these heaters on our RV's tanks for years - just in case.
However of course, they're not ON drawing battery power full-time in cold outside air temperatures - they cycle ON and OFF keeping the tank wall at an average above-freezing temperature during cold weather - so the current they pull from your batteries per hour is not the constant amount shown in the UltraHeat website specifications. Due to their ON and OFF cycling, the average current drawn per hour will be less than what the specifications show on the website.
With plenty of solar power and daily sun or with daily generator runs - to recharge coach batteries - you should be able to keep your tanks from freezing when drycamping in cold outside air temperatures.
Use of these pads seems like a no-brainer to me as compared to messing around with anti-freeze in the tanks, or worse yet ... not using RV tanks and their plumbing during cold weather. We've had the 12 volt version of these heaters on our RV's tanks for years - just in case.
