I've seen 1300 sustained at 6000 feet and 1800 edge of cloud too. Brian
Typos courtesy of my iPhone. On Aug 29, 2012, at 1:56 PM, Nathan Jones <solardud...@yahoo.com> wrote: > > > Ray, > I lived at altitude for many years but before being in this business. Never > had a meter up there of course but I was always aware of the heightened power > from the sun. Two miles less atmosphere to diffuse the power of the light. My > gut and your realistic readings in low light say the meter is spot on. I > would have expected higher numbers than STC but did not know it would be that > much. > Others may have a multiplier to use with STC for altitude that could confirm > your numbers. > Nathan Jones > Power Source Solar > > ------------------------------ > On Wed, Aug 29, 2012 12:26 PM CDT R Ray Walters wrote: > >> Hi All; >> >> I was recently at a mountain top solar site (11,000 ft), doing some testing, >> and I measured insolation values that were averaging 1400w/m2, with a >> temporary peak (edge of cloud effect) that hit 1800w/m2. >> Do I need to my meter recalibrated? Its the Daystar, and seems to be >> accurate, when we got some cloud cover, insolation dropped to 200-300 w/m2 >> as expected. >> >> Interstingly the aging Photowatt 1000 modules were running at only about 60% >> of rated output current into a Blue Sky 3048 MPPT controller. So I'm also >> wondering if I have faulty modules. Back of module temps were about 95 deg >> F. >> Any help on both the high insolation reading or Photowatt troubles would be >> great. >> >> Thanks in Advance, >> >> Ray Walters >> >> _______________________________________________ >> List sponsored by Home Power magazine >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> 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: RE-wrenches@lists.re-wrenches.org > > 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: RE-wrenches@lists.re-wrenches.org 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
