I recently read an artcile on a group of american companies plans to develop a metal roof covering that generates electricty.

In principal the idea makes sense, lets turn all our roofs into a means of generating electrity.

But what is the cost environmentally (producing the materials) and payback overtime? Can these pay for themselves?

Is it viable for these to be grid connected? If not, what is the best mean to store the enregy?

Should governmnets be pushing for thid, legilating nenergy companies to comply and provide incentives?

The company claims to guarantee 20yrs life and a 10 year payback.

Here is the link to the article: http://www.technologyreview.com/Energy/21365/?nlid=1334