Good Deep Cycle Battery

Submitted: Monday, Dec 26, 2011 at 21:45

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marc p

Hi,

After some advice on a deep cycle battery to go under the hood. The current Marshall (from memory) has just about had it. I have 2 x 100 A/H AGM firmly secured under a false floor in the back and run a 40L Waeco as a freezer. The under bonnet wet cell will be used to power a 60L Evacool (to replace the 60 L WAECO that I have given up will ever make one trip without breaking down).

The two AGM are hooked up to 200W of solar for the day and I recharge both the AGM and wet cell with generator and multi-stage chargers at night. AGM and wet cell are on their own circuits from starting battery with isolators.

I am after the largest capacity wet cell that will fit into an N70 tray.

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Reply By: patsproule - Tuesday, Dec 27, 2011 at 06:30

Tuesday, Dec 27, 2011 at 06:30

Century now make an affordable N70 100AH deep cycle wet-cell marine battery that can handle the heat of being under-bonnet. Their standard deep cycle supposedly cant handle the temps.

Pat

AnswerID: 473378

Reply By: Member - Bucky - Tuesday, Dec 27, 2011 at 06:38

Tuesday, Dec 27, 2011 at 06:38

marc p
Century for us too

I tried supercharge battery's, but they failed, just 1 month after warrenty ran out. I have changed back to Century, as a crank, and a deep cycle (marine) as a secondry, and another century deep cycle in the camper
Cheers
Bucky

AnswerID: 473379

Reply By: Sand Man (SA) - Tuesday, Dec 27, 2011 at 08:36

Tuesday, Dec 27, 2011 at 08:36

I would simply run both fridges off the 200Ah battery bank in the rear.
The battery bank is well supported by mulitple charging methods and will support both fridges concurrently.

Bill

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AnswerID: 473385

Reply By: Member - Alastair D (NSW) - Tuesday, Dec 27, 2011 at 09:42

Tuesday, Dec 27, 2011 at 09:42

Marc,
In answer to your original question, I think the advice to use wet cell deep cycle in your under bonnet application is good. Although some may argue, the concensus is that in locations where the batteries will get hot, AGMs do not last well.

I have used AGMs under the bonnet and in my LC100 where the batteries are at the front corners and get plenty of air the AGM on the drivers side has lasted quite well. In my Troopy where the battery is near the firewall on the passenger side the AGM has not lasted well. When the next trips come up the relevant AGM will be replaced by a wet cell deep cycle.

cheers

AnswerID: 473390