Rays of sun bounce off gleaming mirrors on the tiny Lake Colignola in Italy, where engineers have built a cost-effective prototype for floating, rotating solar panels.

"You are standing on a photovoltaic floating plant which tracks the sun, it's the first platform of its kind in the world!" said Marco Rosa-Clot, a professor at Florence University, proudly showing off his new project.

Rosa-Clot and his team say they are revolutionising solar power and that their floatin...

Alex Green Energy, a Kolkata-based developer of clean-energy plants, won the right to develop a 5- megawatt project in a solar auction in India’s eastern Odisha state, pledging to supply power at a record-low rate.

Alex Green has the option to develop the remaining 20 megawatts of photovoltaic capacity from the auction before it’s offered to other bidders, P.K. Mohan, chief executive officer of the Odisha Renewable Energy Development Agency, the state-run body overseeing the solar progra...