FW: PV panel degradation [RE-wrenches]
Michael Welch
michael_welch at sbcglobal.net
Wed Sep 24 10:59:34 PDT 2003
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
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