[RE-wrenches] Using the North Facing Roof

[jerrysgarage01]

WrenchesI see this working south of the tropic of cancer but at 1000 watts per meter squared tilted north might work for a month a year but I don't think the tax credits were proposed for poor performance module installations. I see enphase annual  readings prove the point. Jerry


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-------- Original message --------
From: Peter Parrish <peter.parrish at calsolareng.com> 
Date: 07/27/2015  7:21 PM  (GMT-10:00) 
To: 'RE-wrenches' <re-wrenches at lists.re-wrenches.org> 
Subject: [RE-wrenches] Using the North Facing Roof 

I recently read a short piece that caught me up short, and I quote:

“The fast dropping cost of solar, while a huge boon to the adoption of solar PV, has counter-intuitively altered design parameters. No longer is the north-facing roof considered unusable because limited application in less-than optimal orientations can still show a positive net benefit. Arrays are thus designed now with elements or sub-arrays in these locations, increasing overall kW installation while reducing the energy production per capacity installed. This might have been anticipated based on sheer economic analysis from a users perspective, but so long has solar been expensive that these less optimal orientations were never seriously considered.” I doubt that the individual who wrote this piece came to these conclusions him/herself. Does anyone know of a recent article that argued this perspective? Is this an emerging design practice? If so, I’d like to know more about it.  -          Peter  Peter T. Parrish, Ph.D.President, SolarGnosis1107 Fair Oaks Ave., Suite 351South Pasadena, CA 91030(323) 839-6108petertor at pobox.com 
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