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A new roof-mounted system that concentrates sunlight could cut the price of photovoltaics.
European researchers have built prototypes that combine plastic solar cells with ultrathin, flexible batteries. But don’t throw away your battery recharger just yet.
A new type of material could allow solar cells to harvest far more light.
The potential of solar energy remains unfulfilled.
One of the largest solar energy plants in the world went on line in Portugal this winter.
Congress ends without funding research programs, as the United States falls behind in alternative technologies.