"Glenn Ashmore" wrote
First of all 150 watts of panels is not going to produce 430 AH. You
would
be very lucky to get 300 or so. If you can produce 56 AH/day extra just
leave the refrigerator running and have the cold beer ready and waiting
for
next weekend. A half way decent refrigeration system should keep cold
without being opened on 50 AH a day.

You are right Glenn - 150 watt panels will probably not produce 430 AH. But,
according to this link it should have been about 405 AH:

http://www.qsl.net/ve3lgs/solarpnl.htm

My neighbour at the marina has the problem I described and has recommended
we either install just one 75 watt unit or more batteries. I don't like the
idea of running the refrigeration just to consume power . It gets everything
quite cold in about 2 hrs anyway, once we get to the boat.

Can't the controller simply switch off the current from the solar panels
when the batteries reach full charge?

GBM