According to an article on thinkprogress.org ... The price of solar photovoltaic cells has dropped 99% in the past quarter century. So in an increasing number of markets around the country [USA], solar is at or very close to grid parity.
According to an article on thinkprogress.org ... The price of solar photovoltaic cells has dropped 99% in the past quarter century. So in an increasing number of markets around the country [USA], solar is at or very close to grid parity.