Re: [RE-wrenches] insolation v. actual output

[Kent Osterberg]

Marco, This may be what you are looking for: http://rredc.nrel.gov/solar/calculators/PVWATTS/version1/derate.cgi Kent Osterberg Blue Mountain Solar Marco Mangelsdorf wrote: Could someone please provide me with that generally accepted equation when it comes to estimating AC output from a PV array versus the STC rating?   That is, I’m looking for that equation which estimates the losses due to mod mismatch, soiling, wire losses, etc., etc.  I’ve got someone who mistakenly expects their PV array to put out 90 or more percent of the STC rating.   Thanks, marco

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