PV Watt Calculator & Snow covering [RE-wrenches]

[John Blittersdorf, Cent. VT Solar & Wind]

Tump,
   Another try with my sensitive touch pad on my laptop.  My  experience with 
snow is erratic.  This winter with Global Warming and rain  every week this 
winter in Vermont has shown  snow attachment to my array  due to wet snowfall 
with dropping temperatures.  But we have also had warm  enough temps to be sure 
the arrays clear when the sun is strong.  I would  guess that every specific 
array location (with differences in elevation, wind  and other factors), will 
make it hard to get a correction factor.  My gut  feeling here is that we lose 
about 10 to 30% of possible power production during  the winter if arrays are 
not cleared manually.  This could be much  higher in high snow areas where it 
may not slide off or melt off.  It is  raining again on our last shot of some 
power snow.  In the past, I have  seen snow cover on roofs for over a month 
and a half due to very cold  temperatures but not this year.
 
We are still trying to get good solar data from customer all over Vermont  to 
see what the maximum variations in power production really are with similar  
systems. 
.
John  Blittersdorf
NABCEP Certified Solar PV Installer
Central Vermont Solar  & Wind, Inc.
104 River Street
Rutland, VT  05701

802-747-0577
802-773-0924 fax
802-770-8625 cell
_www.cvsolar.com_ (http://www.cvsolar.com/) 




**************Ideas to please picky eaters. Watch video on AOL Living.      
(http://living.aol.com/video/how-to-please-your-picky-eater/rachel-campos-duffy/
2050827?NCID=aolcmp00300000002598)

[Non-text portions of this message have been removed]


- - - -
Hosted by Home Power magazine

To send a message: RE-wrenches at topica.com

Archive of previous messages: http://lists.topica.com/lists/RE-wrenches/read

List rules & how to change your email address: www.mrsharkey.com/wrenches/etiquette.php

Check out participant bios: www.mrsharkey.com/wrenches/

Moderator: michael.welch at homepower.com
--^----------------------------------------------------------------
This email was sent to: michael.welch at re-wrenches.org

EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9.bWljaGFl
Or send an email to: RE-wrenches-unsubscribe at topica.com

For Topica's complete suite of email marketing solutions visit:
http://www.topica.com/?p=TEXFOOTER
--^----------------------------------------------------------------