The plummeting price of electricity from solar panels is one of the driving forces aiding the transition to clean energy. Government policies and scientific innovation around the world have helped to reduce the average cost of utility-scale solar power by more than 80 percent since 2010, making it the least expensive power source in many, if not most, places. Now the Department of Energy has set a target of reducing the cost by more than half again by 2030, to an unsubsidized average of 2 cents per kilowatt-hour. That cost, which takes into account the price of construction and operation, would have seemed like a fantasy not long ago. By taking the least expensive power source and making it much […]