Well, I can now answer the question that I asked in the thread title. It was indeed too good to be true. After revising the design a couple times, I told them that I would just take the original offer. When it went to their "contracts" department for review, the response (at least according to my Las Vegas-based rep, who replaced my now-terminated initial local rep) was that "the pricing was wrong." They have sent a new contract with a price about $3500 higher, which works out to a total of $2.64/kw. Given the substantial delay in responding to my requests, the elimination of the local sales staff and the relatively low price, my sense is that Tesla Solar is on shaky ground. I believe that their 20 year warranty should be viewed in that context. Although, the truth is that I don't know that any of today's solar players are on financial footing that is any more solid, so maybe it is not a differentiating factor.