Mic wrote:
This issue is from a cruiser 1/2 way around the world and via sailmail

From some research here are some Ideas and the message I sent.

...

Your last post seems to confuse the issue. I'm not sure of the
benefit of sending marketing info on items that your friend may or may
not have.

Without a bit more info its impossible to diagnose a problem like
this. For instance, when you say "overcharging" to you mean serious
overvoltage (15+ Volts) which implies faulty equipment or improper
hookups, or do you mean a battery continues to get charging voltage
(about 14.4V) when it should go to a float charge? The latter is a
chronic problem of trying to charge several banks that are at
different charge states, and there is no simple answer without
considering the system in detail.

So Mic ... is this a friend of yours, or is it just a query that
someone posted on forum?