FW: PV panel degradation [RE-wrenches]

[Michael Welch]

Hi gang. AJ asked me to post this, as he is having trouble posting messages.

>Hello- 
>
>A friend showed me this website that reports the degradation over time for 53 different modules - some should have been derated right out of the box.  Looks at the RESULTS section in the lower left portion of the webpage. "Tests" has a good Excel chart that you can download. He calls this degradation 'The dark underbelly of the PV industry'.  Hope this is useful. Ciao, aj
>
>Draker Solar Design, LLC 
>www.drakersolar.com 
>Phone 802 238-8648 
>Fax     802 657-3731 
>
>-----Original Message----- 
>From: Doug Pratt [<mailto:dmpratt at sbcglobal.net>mailto:dmpratt at sbcglobal.net] 
>Sent: Tuesday, September 16, 2003 9:27 PM 
>To: RE-wrenches at topica.com 
>Subject: RE: PV panel degradation [RE-wrenches] 
>
>The figure I remember hearing from the heavily-monitored PVUSA project 
>in California (and have been repeating to customers for quite some 
>time), is 0.25% to 0.50% degradation per year for single and poly 
>crystal.  But I honestly can't put my finger on the data source this 
>instant...so take it as hearsay. 
>
>Bill, or somebody who worked on PVUSA care to wade in here? 
>
>Cheers, 
>Doug Pratt 
>
>-----Original Message----- 
>From: keith [<mailto:kcronin at lava.net>mailto:kcronin at lava.net] 
>
>Does anyone have historical data on pv panel degradation?  Is it safe to 
>say it is ½ to 1% per year? 


Michael Welch

------------------------
"I am an enemy of the State. But isn't everyone?"
			Edward Abbey

Michael Welch, michael.welch at homepower.com
     Home Power magazine
     www.homepower.com
     To reach me: 707-822-7884
     To reach Home Power: 800-707-6585

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