Ultraheat Tank Heater AC/DC

oops I'm not awake yet, I was thinking hot water tank. not holding tank

Hi,

If you go for the dc option you may need to beef up the charging path from the alternator. Are your tanks enclosed?

No, the tanks are not enclosed. It is a three season trailer.

I saw the ad for them in another thread and noticed the DC voltage was 13.5v. Fine if you have shore power but if you did why would you run it off of DC?

Hi Jim,

They are available as 12 and 120 volt or as just 120 volt. In a three season trailer where the temperature is going to stay below freezing it would be wise to have the 12/120 volt version so tanks could be kept warm while traveling.

My mistake Don, They are listed at 13.5v but now I see the 40 gal heater does show the 12v draw at 9 amps.

Whew, with one for each of my tanks it would take the 8-D to make it thru the night. Luckily the size I need is only 4.1a draw, that I can manage.

Does anyone with propane hot water tanks just run it on propane while travelling? That would seem to be a lot more straightforward then using battery power. Is it dangerous?

Jimmc wrote:
Does anyone with propane hot water tanks just run it on propane while travelling?

It would appear you are changing the subject.

I have the duel voltage system on my Rockwood and have had no difficulty towing with the heaters running with my 2004 F 150. I have not had an occasion to do so with the 2011 truck. It would likely take a strong alternator for it to keep up though and my 04 HD F-150 had a very heavy duty alternator. Not sure about the new truck but THINK it would do the job as it's also an HD model. The system of course, would not work nearly as well without enclosed belly on the trailer. There was one winter that I simply didn't bother winterizing and left the trailer running on the heaters all winter (120 volt of course).
Good luck / Skip