# Heater

**URL:** <https://community.electricforum.com/t/heater/3859>\
**Category:** GEM Forum\
**Created:** [November 11, 2013, 9:11pm UTC](https://community.electricforum.com/t/heater/3859 "2013-11-11T21:11:27Z")\
**Posts on this page:** 9\
**Page:** 1

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**Author:** ![eSGEMColo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/esgemcolo/32/714_2.png) [@eSGEMColo](https://community.electricforum.com/u/eSGEMColo)\
**Post date:** [November 11, 2013, 9:11pm UTC](https://community.electricforum.com/t/heater/3859/1 "2013-11-11T21:11:27Z")

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I bought a ROADPRO 12v electric heater… the specs are:  
voltage 12-14 volts DC  
heat current 22-25 amps  
cool current .045 amps  
pulse start amp curent \<28 amps  
ptc element 300 watts

because I don’t understand these numbers and am wondering what this will do… I plan to draw the power from my fuse box… am sure runniny it for a long period will diminish my mileage… think it won’t take much to heat my eS (truckette)… know you all can help me

there should be a jpg attached

Bob

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**Author:** ![GEMmechanic](https://avatars.discourse-cdn.com/v4/letter/g/ecccb3/32.png) [@GEMmechanic](https://community.electricforum.com/u/GEMmechanic)\
**Post date:** [November 12, 2013, 7:25am UTC](https://community.electricforum.com/t/heater/3859/2 "2013-11-12T07:25:47Z")

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It won’t work. The 12 volt DC/DC convertor is not made to power a heater. The factory heaters are 72 volt and draw from the batteries. These factory heaters run the batteries down fast. My advice is to just dress warmer.

Daniel

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**Author:** ![eSGEMColo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/esgemcolo/32/714_2.png) [@eSGEMColo](https://community.electricforum.com/u/eSGEMColo)\
**Post date:** [November 12, 2013, 7:49am UTC](https://community.electricforum.com/t/heater/3859/3 "2013-11-12T07:49:00Z")

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it sells itself as a heater that can run directly from the battery… I plan on running it off the 12v side of my cars system thru the fuse system… just like the lights or horn

Bob

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**Author:** ![GEMmechanic](https://avatars.discourse-cdn.com/v4/letter/g/ecccb3/32.png) [@GEMmechanic](https://community.electricforum.com/u/GEMmechanic)\
**Post date:** [November 12, 2013, 8:21am UTC](https://community.electricforum.com/t/heater/3859/4 "2013-11-12T08:21:51Z")

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Again,it won’t work. The 22 to 25 amps this heater draws plus the GEM’s other 12 volt loads will overload the DC/DC convertor. You will need a larger DC convertor.

Daniel

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**Author:** ![eSGEMColo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/esgemcolo/32/714_2.png) [@eSGEMColo](https://community.electricforum.com/u/eSGEMColo)\
**Post date:** [November 12, 2013, 10:30am UTC](https://community.electricforum.com/t/heater/3859/5 "2013-11-12T10:30:20Z")

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OK that’s what I need to know… it says it would run directly off the battery… maybe I’ll go to plan ‘B’ and add another battery to the car and put a plug to a trickle charger… it will just run the heater only

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**Author:** ![eSGEMColo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/esgemcolo/32/714_2.png) [@eSGEMColo](https://community.electricforum.com/u/eSGEMColo)\
**Post date:** [November 12, 2013, 11:26pm UTC](https://community.electricforum.com/t/heater/3859/6 "2013-11-12T23:26:24Z")

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I have had heated seats in the car for more than a year and haven’t run the wires… when the upholstery guy had wired them to the pack… I had undone that … today we added an extra fuse block under the hood and reconnected the seats thru that… a warm butt and back is not bad…

Bob

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**Author:** ![bgeery](https://avatars.discourse-cdn.com/v4/letter/b/b5e925/32.png) [@bgeery](https://community.electricforum.com/u/bgeery)\
**Post date:** [January 3, 2014, 9:30am UTC](https://community.electricforum.com/t/heater/3859/7 "2014-01-03T09:30:00Z")

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If a heater is desired, go buy a 72V heater.

[Defrost vent, Golf Cart heater,Cabin Heater, direct current | DC Thermal Website](http://dcthermal.com/catalog/category/12-48-volt-brushless-cabin-heaters)  
[12 - 72 volt heaters www.boatandrvaccessories.com](http://www.boatandrvaccessories.com/heaters-12-72-volt.html)

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**Author:** ![Helas007](https://avatars.discourse-cdn.com/v4/letter/h/49beb7/32.png) [@Helas007](https://community.electricforum.com/u/Helas007)\
**Post date:** [January 8, 2014, 2:27am UTC](https://community.electricforum.com/t/heater/3859/8 "2014-01-08T02:27:27Z")

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[quote=GEMmechanic;17438]It won’t work. The 12 volt DC/DC convertor is not made to power a heater. The factory heaters are 72 volt and draw from the batteries. These factory heaters run the batteries down fast. My advice is to just dress warmer.

Daniel[/quote]

I agree with DANIEL.

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<div class="post-metadata">

**Author:** ![eSGEMColo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/esgemcolo/32/714_2.png) [@eSGEMColo](https://community.electricforum.com/u/eSGEMColo)\
**Post date:** [January 17, 2014, 1:17pm UTC](https://community.electricforum.com/t/heater/3859/9 "2014-01-17T13:17:48Z")

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thanks Brent… I’ve seen these… the price out weighs the need for warmth at this time… the next question would be amperage… guessing between 20-40… probably not more… lastly the mounting… where and how

Bob