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You also get 30% back in the form of a tax credit when you purchase solar. So that might mean that the cost is only $10k. I'm also not sure if the Sunroof websi
by fastest963 4y ago
You also get 30% back in the form of a tax credit when you purchase solar. So that might mean that the cost is only $10k. I'm also not sure if the Sunroof website is just doing straight math based on today's electricity rates or if it assumes some amount of inflation. If the past predicts the future your rates could be 75%+ higher in 20 years making solar much more lucrative.
- edmundsauto 4y agoI researched historical rates in San Diego (upcoming solar install prework) and prices have increased an average of 5%/year for 10 years running. This felt like a reasonable assumption to me, although to be cautious I used 3%. Rates will change! Energy doesn’t look like it will get cheaper, especially with EV fleet rollouts. Accounting for planned 2 EV purchases at 10k miles/year, the largest system I can build on my roof has something like $150k savings against <$50k cost over 20 years. That gives a lot of room for unexpected issues and feels like a wise bet to take.
- the_arun 4y agoYep, I missed counting energy rate increase. Would the output of solar panel degrade over time? Or is it constant?
- cinntaile 4y agoIt degrades and the amount of degradation is dependent on the PV technology used, but you can find the percentages online. You should still be at 80+% of the original output by the time you retire your panels (20-30yrs later).