There is alot of data out there on the Internet regarding the cost of solar, with numbers varying widely from one source to another. For this reason, Rivertown Solar has taken it upon itself to nail down and present real numbers. But why, you ask, are these the real numbers and rather than those present on Energy Sage or Home Advisor or some other source? Because they come from the New York State Research and Development Authority (NYSERDA), the agency to which all NY-Sun participating contractors must report. Culling their data from Open Data NY, we've summarized the solar market as it exists today and over time in Westchester County.