A French engineering company is currently testing the prospect of implementing solar panel roads across four continents - and the company plan to commercialize its cutting edge technology by 2018. A subsidiary of engineering company Bouygues, called Colas SA - is behind the innovative project and extensive testing is currently taking place at a test site in Tourouvre, Normandy.
Colas SA has ambitious plans and after almost five years of research and tests it hopes to roll-out its rugged solar panels across four continents. Colas SA has designed rugged solar panels, capable of withstand the weight of an 18-wheeler truck - which it is now building into road surfaces. After nearly five years of research and laboratory tests, they're constructing 100 outdoor test sites and plan to commercialize the technology in early 2018.
Chief technology officer at Colas SA's Wattway Unit, Philippe Harelle said: "Solar farms use land that could otherwise be for agriculture, while the roads are free. As solar costs plummet, panels are being increasingly integrated into everyday materials."
Last month Tesla Motors Inc. surprised inventors by unveiling roof shingles that double as solar panels. Other companies are integrating photovoltaics into building facades. Wattway joins groups including Sweden's Scania and Solar Roadways in the U.S. seeking to integrate panels onto pavement.
To resist the weight of traffic, Wattway layers several types of plastics to create a clear and durable casing. The solar panel underneath is an ordinary model, similar to panels on rooftops. The electrical wiring is embedded in the road and the contraption is topped by an anti-slip surface made from crushed glass.
The 2,800 square meters of solar panels are expected to generate 280 kilowatts at peak, with the installation generating enough to power all the public lighting in a town of 5,000 for a year, according to the company.
The electricity generated by this stretch of solar road will feed directly into the grid. Another test site is being used to charge electric vehicles. A third will power a small hydrogen production plant. Wattway has also installed its panels to light electronic billboards and is working on links to street lights.
The next two sites will be in Calgary in Canada and in the U.S. state of Georgia. Wattway also plans to build them in Africa, Japan and throughout the European Union. "We need to test for all kinds of different traffic and climate conditions," Harelle said. "I want to find the limits of it. We think that maybe it will not be able to withstand a snow plow." The potential fragility joins cost as a potential hurdle.
"We're seeing solar get integrated in a number of things, from windows in buildings to rooftops of cars, made possible by the falling cost of panels."
Bloomberg New Energy Finance analyst Pietro Radoia said. "On roads, I don't think that it will really take off unless there's a shortage of land sometime in the future."