Re: Shore power vs battery while at slip
Scott, if your 12v loads are light enough so that the charger is really powering them and the batteries are just watching the show, then there's no downside to doing it that way.
OTOH if your loads are actually pulling down the batteries, that's still using up discharge cycles. In which case I'd just beef up the charger to prevent that.
How does the Bob Marley song go? "No AC, No Cry..." ? :-)