I'm starting work on the electrical system
for our 34' sailboat that the two of us will be living aboard
and cruising full time. The boat had 2 six year old 12v batteries that had been abused, so they're getting thrown out. I'm wanting to replace them with 6v GC2 batteries, but I'm not sure how many I want to get.
We will have about 500w solar
, and don't currently have refrigeration
, but I think we'll be installing it. We won't have air conditioning
or hot water
heaters though. We have LED lights
so that helps, but I do like to run the laptop
a lot so that hurts...I know the question is best answered by adding up our daily electrical
load, but having not lived onboard yet, it's hard to say exactly what our usage patterns will be.
I feel like 430AH (4 batteries) will be tight with refrigeration
, and maybe we should go ahead and spring for 645 AH (6 batteries). I also like the idea of having some excess capacity so we wouldn't necessarily have to run the motor
to charge after 1 cloudy day. I would get 4 and then get 2 more later if needed, but it seems to be a no no to mix batteries of different ages.
Is 645 AH in 6 GC2 batteries overkill for a 34 foot monohull
? Theres plenty of space right now, but once we start packing the boat full of our stuff I wonder if I'll regret having the extra 2 batteries?