Unisolar Roofing [RE-wrenches]

[Jeffrey Wolfe, Global Resources]

Hi William,

There are, I believe, a bunch of programs available for PV calcs. We use 
Solar Design Studio 4.0 from Maui Solar Software 
(www.mauisolarsoftware.com). This program also includes shading and 
inefficiencies. Not completely real world, but gives a pretty good picture. 
It also allows different kinds of tracking (although I don't think it does 
"seasonal adjustment" you'd need multiple runs for that).

Jeff

Jeffery D. Wolfe, P.E.
Global Resource Options, LLP
A Woman-Owned Vermont Limited Liability Partnership
4 Kibling Hill Road
P.O. Box 51
Strafford, VT 05072
802/765-4632
802/765-9983 (Fax)
global at sover.net
http://www.globalresourceoptions.com




----------
From: 	William Miller[SMTP:wrmiller at slonet.org]
Reply To: 	RE-wrenches at topica.com
Sent: 	Tuesday, March 13, 2001 10:14 PM
To: 	RE-wrenches at topica.com
Subject: 	Re: Unisolar Roofing [RE-wrenches]

At 09:01 AM 3/13/01 -0800, you wrote:
>Remember on any roofing PV, it may not be appropriate in areas with snow, 
or
>in areas where economics is a major factor, as it precludes seasonal tilt.
>This loses the near 30% gain possible by seasonal angle adjustment, 
raising
>the PV portion of system cost proportionally.
>
I read in a Home Power article that seasonal adjustments only net a 10%
gain HP #36.  What is the reality?

Also, does anyone know if there is a program available to calculate the
efficiency of a PV array oriented away from true south at various
declinations?

William Miller

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For info contact list moderator by email:
 michael.welch at homepower.com

____________________________________________________________
T O P I C A  -- Learn More. Surf Less. 
Newsletters, Tips and Discussions on Topics You Choose.
http://www.topica.com/partner/tag01