Why solar roof?
The roof is a perfect location for a solar energy generation plant. It is an expanse of open space facing up to the sky. Moreover it is space you already own or control and which otherwise has no use apart from keeping the rain out. Thus by turning it into a solar generation pant you make something out of nothing – think of it as like owning an oil prospecting licence but with the oil already discovered, much more easily extracted, in an almost infinite supply and without the greenhouse gas side effects.
