Look for a super comprehensive article on the topic of production modeling in the Apr/May issue of SolarPro (SP3.3) by Tarn Yates and Bradley Hibberd of Borrego Solar. It includes information on TMY (typical meteorological year) data, like that published by NREL here:
http://rredc.nrel.gov/solar/pubs/redbook/ David Brearley, Senior Technical Editor SolarPro magazine NABCEP Certified PV Installer [email protected] On 3/3/10 9:35 AM, "Andrew Truitt" <[email protected]> wrote: > > Is anyone aware of a resource for finding local historical irradiance data? > We've had a cloudy winter around the DC Metro area and I would like to > quantify how far down we are from the average for new customers concerned with > production. > > > Thanks in advance, > > Drew > >
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