Most likely there is a old thread for this somewhere but being a newcomer
could not find it so apologies in advance.
My question is this: I want to add 100 Ah to existing leasure battery
bank of 2 x 100 Ah. What are the consequences
a) to the alternator
of VP MD2040 from 2004)
b) to the shore power charger
c) to the batteries
Some preliminary answers in my mind: most likely the situation where the batteries
are at 30% is the worst scenario. In this scenario,
a) the alternator must work
with 1.5 times the current
that the 200 Ah bank drew and possibly a longer time. For electric parts
perhaps ok (is it?), but do I see a broken belt more often?
b) If the maximum current
for the shore power charger
is exceeded in the beginning, some safeguard will snap in the charger? Or are they usually built so that they can restrict the current automatically?
c) charge current will be some 10% of the total capacity. Will this cause some sulphate forming in the lead batteries in the long run, or other problems? (In any case the average life span of a cheap battery
is about 6 years so is this really a problem?)
Please comment, Tuomas