Why? The average price of an installed solar system in Germany came to $2.80 in the third quarter of 2011. In the U.S., it was about $5.20 in the third quarter. Germany Installed 3 GW of Solar PV in December — The U.S. Installed 1.7 GW in All of 2011. Germans have a much more mature solar market. The country’s simple, long-term feed-in tariff makes financing projects less expensive, and has created a sophisticated supply chain that allows companies to source product, generate leads and get systems on rooftops efficiently.