[RE-wrenches] Tracker effectiveness

[R. Walters]

I've used NREL's data (PVWatts) to compare trackers vs. fixed. Here  
in Taos, its worth the money for the summer, but not cost effective  
for the winter. I only recommend them now for water pumping (summer  
max load) and grid tie.
I have no reason  not to trust the NREL data. Its correlated with our  
experience over the years nicely.

Ray

On Sep 3, 2008, at 6:42 PM, William Miller wrote:

> Friends:
>
> For years I have relied on some old studies to quantify the  
> effectiveness of one and two axis tracking.  I have heard anecdotal  
> reports that tracking does not deliver the increase in power that  
> was originally reported, especially in winter.  Are there any  
> recent studies on PV tracking that might quantify these values?  I  
> would like to compare tracking in off-grid and grid-tie applications.
>
> Thanks in advance.
>
> William Miller
>
>
>
> _______________________________________________
> List sponsored by Home Power magazine
>
> List Address: RE-wrenches at 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
>

R. Walters
Solarray.com
NABCEP # 04170442	



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20080903/bad40865/attachment-0004.html>