by lockie » Sat Nov 22, 2014 8:07 am
One cheaper low-hassle option, if you have a diesel, is to fit an external regulator to the alternator. This will allow it to charge your batteries much faster, and to a much higher level, than the standard built-in automotive regulator. It will very effectively supplement a decent solar array.
Google the Sterling one, which costs a few hundred dollars. You will need some electrical smarts to install it, or can take your alternator and the regulator to a marine sparkie.
Cheers, Graeme