ValueAnalyst
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I disagree, and please define meaningful demand. This may be where the confusion lies.
The solar roof is the equivalent to the Roadster. It's version 1 to prove to everyone this works. It might appear expensive, but those with the money and loyalty to Tesla (probably Roadster and initial Model S owners) will purchase it. I don't think anyone here is claiming the solar roof is going main stream any time soon. It's an aspirational product. It helps cement Tesla's brand equity in the solar sector to validate the premium brand status. The need this to survive in the current solar market. It's strategic, and imo a smart strategic move.
Meaningful demand to me is 100,000+ roofs per year. I don't see 100,000 households dishing out $50-60k for a roof.
100,000 roofs would generate ~$5-6B in revenue, and probably not much in gross profit, but the problem is Gigafactory 2 is unlikely to ramp up to supply that many roofs per year until 2019 at the earliest, and by then Tesla will likely have $40-50B run-rate revenue, so ~10%, and that's IF Gigafactory 2 ramps up quickly. I don't see how that's possible with Model 3/Y/Semi and stationary storage in focus.
I agree that Solar Roof is Roadster-stage at this point. That is my exact point. We may have to wait until 2020 for it to become a mass-market solution where Tesla is teaming up with national homebuilders. I think that's the direction Tesla may take, but let's not get carried away with 2017/18/19 projections just yet. $50-60k is way too expensive for that.