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post #21 of 24 Old 08-12-2013
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Re: understand 12v electrical

Battery Maintenance Facts

State of Charge Specific Gravity Voltage - 12V Voltage - 6V
100% 1.265 12.7 6.3
75% 1.225 12.4 6.2
50% 1.190 12.2 6.1
25% 1.155 12.0 6.0
Discharged 1.120 11.90 6.0
* Sulfation of Batteries starts when specific gravity falls below 1.225 or voltage measures less than 12.4 (12v Battery) or 6.2 (6 volt battery).
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post #22 of 24 Old 08-12-2013
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Re: understand 12v electrical

Quote:
Originally Posted by kentobin View Post
Battery Maintenance Facts

State of Charge Specific Gravity Voltage - 12V Voltage - 6V
100% 1.265 12.7 6.3
75% 1.225 12.4 6.2
50% 1.190 12.2 6.1
25% 1.155 12.0 6.0
Discharged 1.120 11.90 6.0
* Sulfation of Batteries starts when specific gravity falls below 1.225 or voltage measures less than 12.4 (12v Battery) or 6.2 (6 volt battery).
True, but a 20 hour test brings the battery down to 10.5 volts. The load should be 5% of battery or bank size for accuracy. If you can't get it exact don't bother trying - you already have an inaccurate AH estimation and don't need another one.

I don't expect the issue to be the batteries, but the monitor.

Brian
Living aboard in Victoria Harbour
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post #23 of 24 Old 08-13-2013 Thread Starter
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Re: understand 12v electrical

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Originally Posted by chucklesR View Post

Put it back to 232 AH, run a equalization process via your charger (overcharge them on purpose)... and above all else do some reading on how batteries work.

If I can learn it, so can you.
That is what the reseller of the batteries suggested after talking to them. I have been doing a lot of reading on how batteries work but thanks for that sugestion also.
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post #24 of 24 Old 08-14-2013
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Re: understand 12v electrical

Ample Power Company Home Page, tech tab, download the Ample Power Primer, everything you need to know about batteries for boats.

Stu Jackson, C34, 1986, M25 engine, Rocna 10 (22#)
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