I got a 40W before Xmas and in average to good sun levels it can easily keep up with the fridge (one of those CF50 Wacos), all lights, keep laptop
charged (DVD for the kids), radio
, gentle stereo usage and instruments, not that we have a lot of those. Hard out stereo use I don't think so.
On a good day it's putting out 2.5-2.9amps according to the meter thingy. But then I haven't used it during a winter yet so that will be interesting. And we are a low power consumption boat
I'd say a 32W would supply more than you may think especially on a full on sunny day. I must admit to being surprised how well my 40W does, I didn't expect quite it to keep up as well as it does. A Suntech out of China
I think it is.
$100 with controller is very good. A good controller is a must have.