*the price of solar photovoltaic modules tends to drop 20% for every doubling of cumulative shipped volume https://en.wikipedia.org/wiki/Swanson's_law https://

*the price of solar photovoltaic modules tends to drop 20% for every doubling of cumulative shipped volume https://en.wikipedia.org/wiki/Swanson's_law https://en.wikipedia.org/wiki/Swanson's_law