2,5 €/W: le toit solaire de Tesla coûte 10 fois moins cher que la route solaire et produit davantage d'électricité pendant plus longtemps.
"(...) The vision Musk describes with the solar roof is the grand unification of Tesla’s clean-energy ambitions, combining solar power, batteries, and electric cars. “These are really the three legs of the stool for a sustainable energy future,” Musk said. “Solar power going to a stationary battery pack so you have power at night, and then charging an electric vehicle … you can scale that to all the world’s demand.”
" Tesla’s cost for active solar tiles is about $42 per square foot, “significantly below” BNEF’s prior estimate of $68 per square foot, Bromley said. Inactive tiles will cost $11 per square foot."
Roofing a 2,000 square-foot (186 m2) home in New York state—with 40 percent (75 m2) coverage of active solar tiles and battery backup for night-time use—would cost about $50,000 after federal tax credits and generate $64,000 in energy over 30 years, according to Tesla’s website calculator. That’s more expensive upfront than a typical roof, but less expensive than a typical roof with traditional solar and back-up batteries. The warranty is for the lifetime of your home."