Just my opinion, but out side of those seeking a true off grid system because of cost, location or preferences, there are a lot of downsides to solar. No one would be looking at it if the industry wasn't heavily subsidized (taxpayer$$$), if they looked at the downsides of having a "permanent" installation done over their existing roof (which has a deterioration rate of it's own), if there were "tax credits" (other people make up your share) and if solar salesmen weren't the cream of the crop of used car salesmen. And what gives anyone the confidence that the 35 year guarantee is worth the paper it was written on? Ever hear of Solyndra? These companies come and go like clothing fads.
100% solar in New England? No freakin' way that's possible friend.