I think it depends on your motives. If you are doing it to improve the environment, then it is a good thing. But, if you are doing it to save money on your electric bill, then I think it is too expensive and too risky. The potential payback and overall cost savings are just not worth the intial and ongoing investment. I wouldn't believe any payback calculations provided by the contractor. Also, I think that, when you decide to sell the house, the solar panels will be a negative feature for potential buyers. So, I think the money you spend upfront will reduce, rather than increase, the value of your house.
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