With the introduction of feedin tariffs in April 2010, the payback period on a photovoltaic installation was shortened.
http://www.scribd.com/doc/51830516/Payback-Photo-Voltaics
With the introduction of feedin tariffs in April 2010, the payback period on a photovoltaic installation was shortened.
http://www.scribd.com/doc/51830516/Payback-Photo-Voltaics