http://handybobsolar.wordpress.com/2...er-that-works/
The link above is a great down to earth solar / boondocking information source. Bob has been there and done it and offers tremendously valuable advice.
I installed a 135W Kyocera panel and a 3 stage charge controller on my 2005 national RV - Tropical roof. I wanted a good charge source that would fully charge my 470ah battery tank with the correct (14.8V) voltage. I also installed a Trimetric monitoring system and it is terrific.
Only have about 7 amps in full sun, but I wired 4 guage wire from the roof to the controller and have the room and controller amps to add 3 more later on.
Duane