Why are more roofs not made of solar tiles?

For instance, the small Swiss company Freesuns is considering expanding to the US.

Deborah Learoyd, Freesuns' CEO and managing director, estimates that the company's sales have grown 20–30% since it was established in 2019.

In general, solar roof components continue to be manufactured in smaller batches. This limits the economies of scale and standardisation, though flexible manufacturing could help somewhat.

Learoyd says that while the unit costs for Freesuns' products are slowly decreasing, "a lot of the cost is actually the fact that every roof is a little bit different. And so it has to be engineered a little bit differently, installed a little bit differently".