Max, fine powdery material....? It could very well be a pollen/dust issue, and as you suggest it could accumulate twofold, on the roof as well as the PV array. As for it only running off on the one side.... perhaps the wind is predominately from the south and the two surfaces are catching most/all the pollen/dust before it blows over the roof to the north side?agricultural area = fields + machinery = lots of dust. Are his fields or neighboring fields sprayed with chemicals? benn DayStar Renewable Energy Inc. benn@daystarsolar.ca780-906-7807 HAVE A SUNNY DAY
Date: Tue, 14 Jun 2011 10:26:28 -0400 From: m...@southern-energy.com To: re-wrenches@lists.re-wrenches.org Subject: [RE-wrenches] Interesting Dust Issue Esteemed Wrenches, I have an interesting issue with one of my installations. This is the message from the customer: "I use the barn roof for rainwater harvesting, too. The first rain after installation left my wire mesh strainer clogged with a fine powdery material. I assumed it was debris from installation. The next rain gave the same result. I assumed it was pollen as I have for each rain since. HOWEVER, the roof has two sides and it is only the south side, with the PV panels, that clogs!" The site is in an agricultural area and the barn has a metal roof. We completed the installation about 6 months ago and he is still having the issue. My first thought is that it is related to the doubling of surface area since pollen could accumulate on both the modules and the roof surface below. Any suggestions or thoughts would be great. Thanks Max -- Max Isaacs, Residential Project Manager Southern Energy Management (C) 919.538.9712 (O) 919.836.0330 (F) 919.836.0305 101 Kitty Hawk Drive Morrisville, NC 27560 www.southern-energy.com _______________________________________________ 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
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