PV Environmental Payback Analysis [RE-wrenches]

[Joel Davidson]

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Hi Doug,
I also refer people to the NREL brochure (which also references Alsema's work) because the average person will accept the DOE's word over the word of a solar salesperson. Go figure.
Best regards,
Joel Davidson

-----Original Message-----
From: Doug Pratt <dmpratt at sbcglobal.net>
Sent: Jan 20, 2005 9:06 PM
To: RE-wrenches at topica.com
Subject: RE: PV Environmental Payback Analysis [RE-wrenches]

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Joel, here's a good two-page summary of PV payback from NREL dated Jan. '04.
(However, all the references are dated '00 or earlier.) I keep this one
bookmarked for customers who want to know if PV pays for itself. Short
enough for the typical attention span, with extensive references if they
want to dig deeper.
http://www.nrel.gov/docs/fy04osti/35489.pdf 

Cheers,
Doug Pratt


-----Original Message-----
From: Joel Davidson [mailto:joeldavidson at earthlink.net] 
Sent: Tuesday, January 18, 2005 4:17 PM
To: RE-wrenches at topica.com
Subject: Re: PV Environmental Payback Analysis [RE-wrenches]


Thank you all for the info. Todd is right that the Home Power article is the
best plain language analysis. I can't find anything better from Knapp,
Alsema or others since year 2000. In summary:
1. Once produced, PV consumes nothing and emits nothing other than
electricity produced from light.
2. PV embedded energy payback time is substantially less than its expected
lifetime.
3. Amorphous thin-film PV has an energy payback time of less than 2 years.

Joel Davidson

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