PV Environmental Payback Analysis [RE-wrenches]

Tom Lane, Energy Conservation Services tom at ecs-solar.com
Wed Jan 19 05:10:26 PST 2005


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Sorry the truth is there has never been a net energy gain ever in the total 
embedded energy of manufacturing  a pv module .There never has  been 
manufactured a  pv module  that will result in a net energy gain   compared 
to he energy embedded in mining glass aluminum etc --- please review the 
work of  HowardOdum --- COST RECOVERY in utility savings does equal 
recovering the embedded cost  from mining to installed module  gator tom
----- Original Message ----- 
From: "Joel Davidson" <joeldavidson at earthlink.net>
To: <RE-wrenches at topica.com>
Sent: Tuesday, January 18, 2005 7:17 PM
Subject: Re: PV Environmental Payback Analysis [RE-wrenches]


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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

-----Original Message-----
From: "Todd Cory, Mt. Shasta Energy Services" <toddcory at finestplanet.com>
Sent: Jan 18, 2005 9:11 AM
To: RE-wrenches at topica.com
Subject: Re: PV Environmental Payback Analysis [RE-wrenches]

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Joel, this is the best I have seen:

http://www.homepower.com/magazine/downloads_solar_power.cfm

Todd

Joel Davidson wrote:

> Wrenches,
> Can anyone refer me to a PV environmental payback analysis? That is, the 
> environmental costs of everything that goes into producing a PV module 
> versus the environmental benefits of using a PV module? Thanks in advance 
> for your help.
> Joel Davidson
>

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