Why are more roofs not made of solar tiles?

"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."

— Deborah Learoyd , Executive

"You try to put a roofer into the equation and they're going, 'This is taking forever. I'm losing money. I could have sold 10 roofing jobs in the time that it takes me to sell this one'."

— Kate Collardson , Executive

"The reason why all solar cells are black, and increasingly the whole panel is now black, is because black is the best absorbing colour."

— Ben Graves , Executive