#101371  by Naki585
 Fri Oct 16, 2015 7:41 am
Hi.

I have read that 2 x 6 volt batteries in series is not a good idea due to the extra thickness of the plates. This causes the solar to burn too much energy to "excite" the thicker plates. This is called "warming the plates"

Has anyone else heard of this theory, or is it just a load of rubbish.

We have 2 x 6 volt batteries giving us 260ah and 240w solar and we are very happy with setup.

Cheers.
 #101373  by Robbie brown
 Fri Oct 16, 2015 8:00 am
I have 4 x 220 6 volt batteries and 320 solar.2 of the batteries are 7 or 8 years old and we never had problems.
 #101375  by scubadoo
 Fri Oct 16, 2015 8:49 am
Naki585 wrote:..Has anyone else heard of this theory, or is it just a load of rubbish.
No, that is certainly a new one for me. I would love to read the source.

Yes, total BS and gobbledegook!
 #101376  by Neddy
 Fri Oct 16, 2015 9:01 am
It's a load of rubbish. Since the initial premise that 6volt battery plates are thicker than equivalent 12v battery plates is WRONG, it is hardly worth going on to refute the other points.
Two 200Ah 6v batteries in series is 6x 2v cells giving 200Ah 12volt capacity about 520mm long weighing 60kg.
One 12v 200Ah battery is 6x 2v cells giving 200Ah 12volt capacity about 520mm long weighing about 60kg.
It is easy to see that, either way, the plates are about the same thickness and weight.

Neville.
 #101377  by mattn
 Fri Oct 16, 2015 9:04 am
"In theory there is very little difference between theory and practice; in practice there's a hell of a lot of difference."

I would love to know where you heard that. Like so many things discussed about batteries even if its true in theory (which I very much doubt) , in practice it's an absolute load of rubbish

In a fully controlled laboratory with very high precision measuring equipment, you might be able to detect a difference (but who knows which way it would be). In a typical motor home, with typical batteries, solar panels, controllers and wiring, being used in the way a typical motor homer uses there typical motor home, there are 1000 things that would make 1000 times more difference to how efficient your installation is.
 #101396  by Mark S.
 Fri Oct 16, 2015 1:34 pm
Have had 2 x 6v in bus since 93. Am on 3 rd set now. Only charging for 10 years was one 40W (no TV) now have 2 x 40W and a TV but no other toys. Works well as we do a lot of walking in evenings.
 #101452  by MikeBravo
 Sat Oct 17, 2015 9:28 pm
Utter nonsense.
Make sure you don't read anything else by whoever wrote that.

For clarification ,this post is in reference to the opening post. Admin
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