As far as I know, the temperature coefficient holds true whether you are increasing or decreasing the temperature around the STC temperature of 25C. Of course, there is going to be a point at which it goes non-linear, but that is not stated.
On Tue, Nov 29, 2011 at 3:58 PM, Scott McCalmont < [email protected]> wrote: > Usually you increase the temperature above ambient by an amount which > depends on the mounting method. Close to the roof is +35 degrees C, more > than 6 inches above the roof is +30 degrees C, and pole or ground mount is > +25 degrees C. > > Scott > > On Nov 29, 2011, at 11:48 AM, Kirk Herander wrote: > > I am in debate with a PE over calculation of low voltage of a series > string on a hot day. He insists that an arbitrary high cell temp is > factored in, not just ambient temperature. Could someone please give an > accepted formula for this calculation? Thanks. I cannot find a clear > reference to low voltage calculation on a hot day (but every reference > material is clear on how to calculate high voltage on a cold day).**** > ** ** > Kirk Herander**** > VT Solar, LLC**** > dba Vermont Solar Engineering**** > NABCEPTM Certified installer Charter Member**** > NYSERDA-eligible Installer**** > VT RE Incentive Program Partner**** > ** ** > _______________________________________________ > List sponsored by Home Power magazine > > List Address: [email protected] > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: [email protected] > > Options & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org > > > -- Chris Mason President, Comet Systems Ltd [email protected] www.cometsystems.co Cell: 264.235.5670 Int: +1305.767.2094 Skype: netconcepts
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