Why would you throw out a paid for PV system? It's a sunk cost unless you're running out of roof space and need more power. The efficiency only drops some 20% o

Why would you throw out a paid for PV system? It's a sunk cost unless you're running out of roof space and need more power. The efficiency only drops some 20% over 20 years. Also, they can be reasonably recycled... http://www.renewableenergyworld.com/articles/2016/06/solar-pv-module-recycling-why-it-s-important.html http://www.renewableenergyworld.com/articles/2016/06/solar-p...