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Realistically, Tesla's solar roofs will probably be usable for 30 years before needing to be replaced. https://solarpowerrocks.com/solar-basics/how-long-solar-

• marvin 9y ago
  And, of course, you've got a free roof included with the purchase.
  • fweespeech 9y ago
    If it works perfectly and you never have to replace anything, yes. But you aren't making the sort of "profit" you would if you just put that money into the market.