Originally Posted by Andrew Grace
That's exactly my point , start actually sailing on a 7 day voyage using the autopilot
etc , with cloud cover or rain squalls and you will quickly find that 500 watts is way under spec to keep the batteries charged,
Agreed. but how often does that happen (leaving for a longer passage
with not much sun for extended periods)?
How many engine
hours per year are required to supply the missing Ah on these few occasions?
Certainly not enough to justify the weight & cost of a genset.
Our recently sold Mahe had 560w solar
and was always self sufficient for liveaboard
use including watermaker
, breadmaker, fridge, etc.
I just heard from the new owner she still is self sufficient, although its October and days are shorter now in the Med and often overcast.