According to the National Renewable Energy Laboratory, financing photovoltaic or PV solar power systems with solar loans are a better financial choice than third-party power purchase agreements (PPA). This appears true for both residential and commercial buyers – up to 29 percent cheaper for homeowners and up to 47% cheaper for businesses.
Of course there is a time / investment level to meet, but with margins at 29% and 47% it's time to look at the numbers again.
Silvio Marcacci of Marcacci Communications and the author of the Green Growth column at TheEnergyCollective.com, wrote an article which breaks it down nicely. Charts and graphs included. See complete article here: