On Wed, 24 Jun 2009 16:10:49 +0700, Bruce In Bangkok
wrote:

Mac? Don't you have 4 500A alternators in parallel so you can charge the
house batteries in 5 minutes, like some boats I know?....(c;]

(It's not funny...I actually saw one like this!....with kids aboard going
offshore!)

How much voltage do you need to pump 2,000 amps into a battery?

More to the point, how much battery do you need? I'd estimate about
40 pairs of golf cart batts at about 120 lbs per pair. Maybe the
question is "how much boat do you need" ?