Which way for small battery pack?
Submitted: Wednesday, May 09, 2007 at 16:25
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tdv
Hi all
Just trying to figure out the best option for a small battery in the camper trailer. it is only need to run lights so i'm thinking around 20amphr which should last for 20 hours of light with my setup.
Should i find one of those little power packs or just by a 20amphr sealed battery and run the cable from the andersen plug (which runs 3 way fridge when on the move) to the battery to charge on the go???? Is this feasible? Will it run the fridge and charge a small battery at the same time? The cabling comes from my second battery under the bonnet.
Other option is to put it in the car and charge from cig lighter. I'm guessing a 20 amp battery isn't too big to fry the cabling????
cheers
terry
Reply By: Mainey (WA) - Thursday, May 10, 2007 at 00:01
Thursday, May 10, 2007 at 00:01
Question is 'why do you need another battery' at all just to run some lights ??
Why not just use the power from the battery that supplies the 3 way fridge power ??
As you 'imply' the 3 way fridge uses gas of a night so it will not be drawing any 12v power at all, and the lights will only use about 2ah x 5 hours = 10ah MAXIMUM, basically nothing at all compared to a fridge.
Will cost only the price of a bit of 6mm▫ cable and a connector, ~$20
AnswerID:
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Follow Up By: tdv - Thursday, May 10, 2007 at 08:48
Thursday, May 10, 2007 at 08:48
Just convienience I guess. I'd also like to be able to take it in the tinnie to run the depth sounder. My AGM under the bonnet runs a 30l 12 v fridge/freezer.
As you say it is only $20 for some cable....and i guess lights could easily be run from the starting battery anyway.
So if I got a small (say 7amp/hr) battery then....could it be charged from the cig lighter???
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Follow Up By: Mainey (WA) - Thursday, May 10, 2007 at 22:45
Thursday, May 10, 2007 at 22:45
question is would it run the depth sounder... I don't know the answer, probably will.
BUT, I would not expect a "cigarette lighter" to recharge a battery of any size, I would use a dedicated larger capacity fused cable than those often used by cigarette lighters.
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