Tom,
This is coming from old memory, so I give this with a grain of salt, but I believe the noontime sun angle at my latitude (44.5) is about 78 degrees on June 21st and about 22 degrees on December 21st. That’s a difference of 56 degrees. David Palumbo Independent Power LLC 462 Solar Way Drive Hyde Park, VT 05655 www.independentpowerllc.com NABCEP Certified PV Installer Vermont Solar Partner 23 Years Experience, (802) 888-7194 From: re-wrenches-boun...@lists.re-wrenches.org [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Tom Elliot Sent: Tuesday, February 22, 2011 7:46 PM To: RE-wrenches Subject: Re: [RE-wrenches] Array tilt angle doesn't matter? “The further north you go the wider the summer to winter sun angle.” Bob-O. Explain this one to me please. The difference between winter solstice and summer solstice sun angle is 47 degrees, everywhere on the planet, even in Hawaii. I suspect that in higher latitudes a lower sun angle means more atmosphere to affect insolation but the planet, last time I checked, is tilted the same everywhere. Tom
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