Supreme Deep Cycle batteries

Submitted: Thursday, Apr 03, 2008 at 14:47
ThreadID: 56239 Views:2038 Replies:2 FollowUps:0
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Hi All,
Anyone have or have used Supreme batteries? I was looking at the CR 275. CR 275 They are a 6v 275ah battery. I can get two delivered to my house in WA for $460 so I will have 12v @ 275A/H. Seems ok to me. I priced trojan and another deep cycle brand this morning(name eludes me) from the battery wholesaler and they were 12v 100-130ah for around $280 to $300. and I would need two for the same ah. Also two six volts are about 5kgs lighter than 2 twelve volts for around the same ah. Your thoughts/ideas?

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Reply By: Member - Alastair D (NSW) - Thursday, Apr 03, 2008 at 15:37

Thursday, Apr 03, 2008 at 15:37
It is better to have 2 6v batteries in series than 2 12v in parallel to give the same AH. You avoid the possible problems of equalisation and potential draining of one by the other unless you have an isolator. Probably not a problem with 2 new ones of the same type, but no 2 batteries are ever exactly the same.

I went to buy a new Fullriver 100ah AGM yesterday, now over $400 and none in stock for a week or 2. Ended up buying an Alco for $270. Has the same warranty - will see how long it lasts.

AnswerID: 296396

Reply By: Peter H - Saturday, Apr 05, 2008 at 15:57

Saturday, Apr 05, 2008 at 15:57
My Thoughts
If you are looking to power something that uses 12 volts, then buy a 12 volt battery.
If you buy 2 x 6 v batteries and series them up, then you have a 12 volt battery. If a cell fails or a cell to cell connection breaks inside the battery or a cell to post connection breaks inside the battery, you no longer have either zero volts or 10 volts good for nothing.
If you buy 2 x 12 volt batteries and parallel them up, then even if something happens to one battery, you can disconnect it and still run on the other. You can't do this if you have 2 x 6 v batteries.
Yes every battery is different, just like every 6 volt battery is different. No one can do anything about it.
Buy the 2 x 12 volts and be prepared, as you now have a backup.
AnswerID: 296802

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