Conventional roofs do not have live power and electronic components. Solar tiles (and panels) add "must not self-ignite" to the usual install requirements like

Conventional roofs do not have live power and electronic components. Solar tiles (and panels) add "must not self-ignite" to the usual install requirements like "must not leak for N years". Good, fast, cheap - between good and fast, I want good first. Cheap remains to be seen.