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GregA

Montana

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Posted: 08/29/22 03:11pm Link  |  Quote  |  Print  |  Notify Moderator

So.. I have a pickup camper and want to create an additional charging system. My truck has two "trailer" hookups. I assume one is for the Camper and the other for a trailer.

I'd like to use the trailer receptacle to create a separate system to charge 2 12V batteries to run underbelly heaters. I routinely camp in -20F.

It would be great to "mount" this system on a hitch rack too (thus removable).

Anyone done anything similar or know how I would go about it?

Thanks-Greg

Lwiddis

Southern California :(

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Posted: 08/29/22 03:35pm Link  |  Quote  |  Print  |  Notify Moderator

In -20F conditions you need to insulate the batteries for them to provide anywhere near their rated capacity. Be concerned with the batteries freezing too when significantly discharged. If the batteries are AGM or Lithium they could be inside the RV with you.


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Lwiddis

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Posted: 08/29/22 03:38pm Link  |  Quote  |  Print  |  Notify Moderator

You’ll freeze your batteries at 60% SOC with a temperature of -16F or there about.

Roger10378

Goodrich, MI.

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Posted: 08/29/22 07:02pm Link  |  Quote  |  Print  |  Notify Moderator

The wiring will not support using both at the same time. It is either one or the other. There is minimal current available for keeping a battery charged when driving.


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theoldwizard1

SE MI

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Posted: 08/29/22 07:19pm Link  |  Quote  |  Print  |  Notify Moderator

Any vehicle charging system will not fully charge your auxiliary battery unless you you are using a DC-DC charger.

Grit dog

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Posted: 08/30/22 11:05am Link  |  Quote  |  Print  |  Notify Moderator

And the "2 trailer hookups" share the same power source, literally.

You can wire in a big DC DC charger and use your truck as a very expensive battery charger, or you can use a generator.

If you routinely camp at -20F, I'd think you'd already understand the virtues, correction, necessity, for a generator.


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time2roll

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Posted: 08/30/22 12:05pm Link  |  Quote  |  Print  |  Notify Moderator

Just get a 7-pin connector and use the B+ and ground terminals to connect to the additional battery. I did this years ago with my pop-up trailer.


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Grit dog

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Posted: 09/06/22 10:05am Link  |  Quote  |  Print  |  Notify Moderator

time2roll wrote:

Just get a 7-pin connector and use the B+ and ground terminals to connect to the additional battery. I did this years ago with my pop-up trailer.


Well that should work like a charm.....lol

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