Windmills vs. Photovoltaics

Because the price of photovoltaics continues to drop – thin film costs are already approaching the magic $1.00 per watt level – combined with lower maintenance costs compared to windmills, our money is on photovoltaics. There appears to be no limit to how much energy will eventually be produced by photovoltaics, and production of photovoltaics is poised to experience sustained exponential growth.