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 Battery Info and Questions
 Charge Voltages
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kcarring
Moderator


Canada
1057 Posts

Posted - November 12 2012 :  18:04:47  Show Profile Send kcarring a Private Message  Reply with Quote
Regular (NON-Conditioning) Voltages



Flooded Lead Acid
14.3V (12V Bulk)
13.2V (12V Float)
28.6V (24V Bulk)
26.4V (24V Float)

Sealed Lead Acid (AGM)
14.3V 12B
13.4V 12F
28.6V 24B
26.8V 24F

Gel
14.3V ...
13.7V ...
28.6V ...
27.4V ...

NiCd
14.3V ...
14.0V ...
28.6V ...
28.0V ...


That's what I've been using for numbers... how bout you? (Standard charging - not reconditioning.)

~~~~~~~~~~~~~
You wouldn't laugh at my igloo if you knew how cold my beer is!

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olddawgsrule
Advanced Member



USA
1434 Posts

Posted - November 13 2012 :  17:12:11  Show Profile  Visit olddawgsrule's Homepage Send olddawgsrule a Private Message  Reply with Quote
Thank you for starting this thread!

This should be a very interesting conversation and a great learning tool.

I have never broken it down to the different cycles and see maybe I probably should.

I personally work on a 15% dis-charge factor, but will charge closer to 20%.
I also work to only charge/dis-charge on the C20 rate.




Old in age, not in mind, so
'Teach me something new'!

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kcarring
Moderator



Canada
1057 Posts

Posted - November 28 2012 :  17:01:57  Show Profile Send kcarring a Private Message  Reply with Quote
Interesting State of Charge vs. Voltage Readings for both discharging, and for charging under different values of C.

You must be logged in to see this link.

Here are some good numbers I use, and these imply you've let the battery rest for many hours. So for example you discharge the battery to 11.8V under load, but then after 8 hrs it reads 12.2 - you'd then use the latter number, and this chart:


State
of
Chg    12 Volt  per cell

100%	 12.70	2.12
90%	 12.50	2.08
80%	 12.42	2.07
70%	 12.32	2.05
60%	 12.20	2.03
50%	 12.06	2.01
40%	 11.90	1.98
30%	 11.75	1.96
20%	 11.58	1.93
10%	 11.31	1.89
00%      10.50  1.75


~~~~~~~~~~~~~
You wouldn't laugh at my igloo if you knew how cold my beer is!

Edited by - kcarring on November 28 2012 17:05:18
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