Tesla's solar roof is dead — here's why

Tesla has effectively killed its solar roof, the shingle-like solar product it introduced nearly a decade ago as a way to generate power without looking like a traditional row of panels. The company has scrubbed public references to the product from its website — the solar roof URL and its support pages now redirect to Tesla’s generic solar landing page, first reported by Electrek. Two solar installers told TechCrunch their companies are still offering the product, though one said availability depends on a project’s timeline, suggesting Tesla is working through existing inventory rather than manufacturing new units.

The solar roof never came close to Tesla’s ambitions. The company aimed for 1,000 installations a week, but after years of refinement had reached only somewhere between 20 and 40 a week as of 2022. It was positioned as a luxury product from the start and only grew pricier over time; Tesla marketed it against the combined cost of solar panels plus a full roof replacement, but people reported receiving quotes that could be as high as $200,000 to install one. Standard panels, meanwhile, kept getting cheaper because the industry manufactures billions of standardized solar cells a year and assembles them into standardized panels — the solar roof’s tiles were unique to the system, forcing Tesla to design and buy its own manufacturing equipment, and low sales pushed the per-unit cost of that equipment up.

Physics didn’t help either. There were reports of the roof’s non-solar parts warping and its underlayment melting under full sun exposure, plus reports that the system produced less electricity than Tesla promised. Heat is the likely culprit: solar-cell voltage tends to decline by about half a percent for every degree Celsius, and while standard panels leave a gap for airflow to cool the cells, the solar roof’s gap was much smaller — which may have driven higher temperatures and robbed the cells of efficiency.

Why it matters

Tesla is now steering buyers toward its ordinary solar panels, but the product’s failure doesn’t necessarily end the idea — companies like GAF and Merlin Solar are still chasing the integrated-solar-roof market, and buyers with specific aesthetic tastes may keep interest alive. Still, if one of the world’s most valuable companies couldn’t make a solar roof work at scale, it raises the bar for whoever tries next.