Charging Caravan battery with 8 or 12 pin plug?

Submitted: Friday, Jul 16, 2010 at 18:22
ThreadID: 80120 Views:2563 Replies:5 FollowUps:1
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(a) Is anyone using an 8 or 12 pin plug to power the Aux battery in a caravan? (instead of Anderson plug)

(b) Has anyone have their *battery isolator* installed in the caravan, instead of near the Cranking battery?

Maîneÿ . . .
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Reply By: Mark - Friday, Jul 16, 2010 at 18:42

Friday, Jul 16, 2010 at 18:42
I have just fitted a 12 Pin flat and used 2 of the 30 amp pins (4 in total with negative) for the trailer battery feed. Actually this is how the trailer manufacturer wire the trailer so I have just done the same on the 4WD end. The 12 Pin plugs have 5 pins that are larger for heavier current applications so better choice than the 8 pin.
I used a Britax B48 on the 4WD end.
Can't help you with the isolator in the caravan as we already have the isolator in the 4WD. The camper trailer has a relay that opens when the ignition is turned off so the trailer battery is isolated from the 2nd 4WD battery when stationary.
AnswerID: 424235

Reply By: Mandrake's Solar Power- Friday, Jul 16, 2010 at 18:44

Friday, Jul 16, 2010 at 18:44
Mainey ,

Recently read this in answer to your first question - from a sparkie on Myswag --

If you have a 12-pin plug you can double up the terminals to get a better connection if you want. Each of the larger pins are rated to 35A which is more than enough to carry charging current.

I converted my trailer over to 12 pin (got rid of the Anderson) and I would never consider going back.


AnswerID: 424236

Reply By: Member - DAZA (QLD) - Friday, Jul 16, 2010 at 18:53

Friday, Jul 16, 2010 at 18:53
Mainey check out thread 80061 it might help.
AnswerID: 424239

Follow Up By: Maîneÿ . . .- Friday, Jul 16, 2010 at 19:51

Friday, Jul 16, 2010 at 19:51

Thanks for that link

Maîneÿ . . .
FollowupID: 694658

Reply By: Member - Murray R (VIC) - Friday, Jul 16, 2010 at 22:42

Friday, Jul 16, 2010 at 22:42
If you mount batt isolator on van and have less than 6 b&s cable to the isolator you will find that the isolater would possible pulsate in and out when the batt was flat due to voltage drop in thinner cable. The voltage drop could be up to 3 volt which would cause the isolator switch off voltage setting to operate. Once isolator switchs off the voltage would rise a switch isolator on then voltage drop would then switch off again, then the pulsating would continue.

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AnswerID: 424274

Reply By: Maîneÿ . . .- Saturday, Jul 17, 2010 at 18:51

Saturday, Jul 17, 2010 at 18:51
Have now sorted out the situation :-)

Thanks for the replies

Maîneÿ . . .
AnswerID: 424330

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