"PeterS" wrote in news:1170165916.682938.227460
@j27g2000cwj.googlegroups.com:

Hi,

Has anyone had experience of fitting a 100A high output alternator to
a Bukh DV24 engine to either replace or supplement the 50A standard
alternator?

The standard alternator belt isn't wide enough to support an
alternator over 80A. Adding a second alternator would seem the way to
go as this means that a split device isn't required and simplifies the
wiring.

Thanks,
Peter



Doesn't matter if it's a 1000A alternator with 8 belts. Your batteries
will still charge about 25% of their AH capacity for about 5-8 hours to
recharge them. As long as the alternator has the capacity to drive the
loads plus 25% of the AH capacity of the house batteries (after the first
10 minutes when boaters DREAM the batteries are all charged up because
the current dropped off) the alternator is big enough. Overkill will NOT
recharge the batteries in 30 minutes, a pipe dream until the nanotube Ni-
Mh 3 minute batteries are delivered in the near future. THEN, you'll
need the 4000A alternator for 3 minutes to a 100% charge.

1920 lead-acid technology charges SLOWLY over HOURS not minutes....sorry.

80A is plenty....over 1100 watts, which would soon boil the electrolyte
and warp up the plates if the battery didn't prevent it at 14.2V.

Larry
--
Democracy is when two wolves and a sheep vote on who's for dinner.
Liberty is when the sheep has his own gun.