On Thu, 25 Jun 2009 09:28:33 -0400, Wayne.B
wrote:

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.

You seem to be confused.

As far as the charger is concerned a battery is just a resister and
acts the same as any other resister. If you increase the voltage
output of the charger you will increase the amperage flowing through
the battery.

You also seem to have missed the point of the entire exchange between
Larry and myself which was a rather (I thought) understated bit of
sarcasm about people who seem to believe that installing massive
amounts of charging capacity is going to shorten significantly the
amount of time to charge a given sized battery bank.

Cheers,

Bruce
(bruceinbangkokatgmaildotcom)