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Indeed, their questionable efficiency is one of the main reasons that more solar roads aren't currently being built. Colas says that Wattway's photovoltaic efficiency is 15 percent, which is pretty good (commercial panels that you might put on your roof are at about 20 percent).
World’s first solar road opens in France
Indeed, their questionable efficiency is one of the main reasons that more solar roads aren't currently being built. Colas says that Wattway's photovoltaic efficiency is 15 percent, which is pretty good (commercial panels that you might put on your roof are at about 20 percent).