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 Battery Charge Indicator
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Initially Posted - 07/22/2007 :  07:42:38  Show Profile  Send moserd an AOL message
Has anyone come up with a good source for an extended range voltmeter of some sort of battery charge indicator? Someone 'blew' the breaker on my dock a couple of weeks ago and as luck would have it I needed lights that evening!

Don Moser

Edited by - on

Steve Blackburn
Master Marine Consultant

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Response Posted - 07/22/2007 :  18:44:54  Show Profile  Visit Steve Blackburn's Homepage
You mean some type of way to measure the % of the battery? If so there are 3 methods:

1. I just installed a solar panel and it came with a charge controller. My charge controller is very basic but a green led shows when the battery is completely full. I believe some more expensive charge controllers will let you read the %.

2. Using a voltmeter you can use the following chart to determine your %. I've even seen someone mount the voltmeter permentantly next to the electrical panel.
100% 12.7V
90% 12.5V
80% 12.42V
70% 12.32V
60% 12.20V
50% 12.06V
40% 11.9V
30% 11.75V
20% 11.58V
10% 11.31V
0% 10.5V
However I have 2 batteries in parallel and with a full charge I show 13.70V.

3. My marine charger (120V plug) has a digital readout that I can switch to %.

Hope this helps.

Edited by - Steve Blackburn on 07/22/2007 18:46:23
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