[Mike80911]

Originally Posted by 911_Dude

Id ask what the efficiency of their panels is rated at. Pretty good improvements over the years. They should be between 21 and 23% panel efficiency. If its less than that they are old, if more he's not telling the truth (ask for a spec sheet). One or two percent difference is significant in total output/sqft. Also ask what brand and type of controllers they will use. The two major types of solar charge controllers are: Pulse Width Modulation (PWM) controllers. Maximum Power Point Tracking (MPPT) controllers. The MPPTs are the ones you want for max efficiency. My personal preference for electrical charge equipment is Victron, hands down. Very advanced, rock solid. If they dont use Victron, ask them why not. There is a lot of cheap chinese crap out there that will do the job, until they dont. My .02, but Im hyper on efficiency. I just added solar and several other electric upgrades to my boat, and boats have somewhat different goals and limitations.

But if you ask those questions, the sales rep will at least think you've done your homework. ;-)

Thank you for the reply. Seems like a couple of valid questions to be asking