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Wayne.B Wayne.B is offline
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First recorded activity by BoatBanter: Jan 2007
Posts: 2,536
Default Boat battery question???

On Thu, 25 Jun 2009 18:50:25 +0700, Bruce In Bangkok
wrote:

Larry posted about people who had multiple 250 Amp alternators
installed. I simply asked how many volts it would take to charge a
battery bank at the installed 2,000 amps.

You seem to be saying that with 14.2 - 14.4 VDC the current flow will
be 2,000 amps, which would make the battery resistance about .00715
Ohms.

Somehow I don't think that is correct..


Actually it is because that is the voltage that *all* 12 volt lead
acid batteries get charged at. The point is, that to charge at 2,000
amps, you need to have about 8,000 amp-hours of battery capacity,
which is not very practical for a 12 volt system because of connection
and wiring losses.