In article ,
Wayne.B wrote:

Which pretty well summarizes most of the advice that others have
offered:

- a single 100 Amp-Hour battery is not big enough because: 1) It will
not supply enough power to be useful; and 2) It will not accept
recharge current at a high enough rate to recharge quickly.

I forget the original post, but though we have two 120 AH batteries,
I've been using only one for a couple of seasons. Started as a test of
our 12w solar panel, but I've come to like the system. Our major
consumption is the anchor light, VHF and interior lights. No fridge. I
discount the stereo, autopilot and such as they're small or infrequent
loads.

If it's partly sunny most of the day, the solar cell is sufficient. If
we happen to run the battery flat, a couple of hours' sunlight will
bring us up far enough to start the Yanmar.

--
Jere Lull
Xan-a-Deux ('73 Tanzer 28 #4 out of Tolchester, MD)
Xan's Pages: http://members.dca.net/jerelull/X-Main.html
Our BVI FAQs (290+ pics) http://homepage.mac.com/jerelull/BVI/