Nice! I had my solar panel installed on the roof of my house in 2015, and they have a pay-off projection of just over seven years. At the beginning of the year,

Nice! I had my solar panel installed on the roof of my house in 2015, and they have a pay-off projection of just over seven years. At the beginning of the year, my neighbor had solar panels installed, and we calculated his pay-off projection of just over four years (both of us took advantage of available subsidies).