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Old 10-19-2015, 01:58 PM   #1
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Arctic Pak 12V or 120V?

We were dry camping with no hookups in our fairly new Forester 2401R and we turned the Arctic Pak switch on because it was supposed to go down to 28 degrees at night. However, it didn't light up so there was no way to tell if it was working. But when we turned on the generator, the switch did light up. We checked with the ThermaHeat manufacturer and they said the pads should be 12V, so why do we have to run the generator to turn them on? Or does the switch lighting up have nothing to do with whether the heaters are really on or not? No info forthcoming directly from Forest River unfortunately and nothing we can find in the manuals. Has this happened to anyone else?
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Old 10-19-2015, 02:06 PM   #2
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I've not seen 12v tank heaters, they may exist but to put out the heat they would need to put out your battery would be dead in no time at all.

If the light lit up upon turning on gennie then they are 110v.

You'd need a pretty hefty battery bank to run 12v tank heaters all night.

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Old 10-19-2015, 02:17 PM   #3
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My tank heaters are 12 v in my Rockwood.
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Old 10-19-2015, 02:18 PM   #4
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My tank heaters are 12 v in my Rockwood.
Tank heaters or the pipe tape?

My flagstaff the pipe heaters were 12v but the tank heaters were 110v

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Old 10-19-2015, 02:28 PM   #5
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Mine are on the 12 V panel. They do make both or dual voltage versions. Quite possible the OP has 120 v like you have had two trailers ago.


Tank Heater Switch on the Monitor Panel

FE Damp mentioned 160 watts each for 12 V. That will kill the battery in no time.
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Old 10-19-2015, 02:34 PM   #6
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Mine are on the 12 V panel. They do make both or dual voltage versions. Quite possible the OP has 120 v like you have had two trailers ago.


Tank Heater Switch on the Monitor Panel

FE Damp mentioned 160 watts each for 12 V. That will kill the battery in no time.
Of course now that I'm thinking about it if the battery was "dead" the light wouldn't have came on till shore power was present.



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Old 10-19-2015, 02:49 PM   #7
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My tank heaters are 12 v in my Rockwood.
Mine are 12v also and will suck your battery faster then your furnace. If your plugged in use your tank heaters and electric heater. If your boondocking just use the furnace if you have a duct in the basement. Rockwoods have a 2" duct for the basement. One or the other, 12v only on both your batteries will be dead in the AM....
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Old 10-19-2015, 02:56 PM   #8
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Of course now that I'm thinking about it if the battery was "dead" the light wouldn't have came on till shore power was present.



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Yes I believe so..dead battery for sure!

"Now if we had a heat loop from the hot water heater that ran down and around the tanks that would be more efficient on battery power. Just a little pump." pat pending...
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Old 10-19-2015, 03:30 PM   #9
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Apparently both 12 volt and 120 volt heaters are available (in fact, there are heaters with both 12 v and 120 v elements!). Suspect FR is supplying either, depending on year and model. Our 2012 Solera has 12 v tank heaters. Draw too much current for boondocking; need converter or alternator supply. Can use while driving (alternator on Motorhome will supply). Advantage of 120 v heaters would be less load on converter when camping with hookups, I would think.
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Old 10-19-2015, 05:31 PM   #10
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Heard back from FR. Apparently the heaters need 13.5v (not 12v or 120v) and when the batteries run down to less than that, they won't work. So when the generator is turned on, they get the 13.5v they need and the switch lights up to show they are working.
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