Dive Summary:

• Roof-top energy systems can look less than classy, so a Swedish company has devised an answer in the form of tiles that resemble the undulating shape of clay roof tiles.
• SolTech's tiles are made of clear glass, and they pass solar energy to any kind of system underneath them.
• The company says the most common system is solar water heating but the glass tiles can work with electric panels, too.

From the article:

A solar thermal heating system by Swedish company SolTech looks a lot like the curved clay or concrete tiles that might normally adorn a roof.  ...