[ExI] Small scale solar payback time (was Re: Planetary defense)

[Keith Henson]

On Thu, May 12, 2011 at 3:29 PM, Kelly Anderson <kellycoinguy at gmail.com> wrote:
> On Thu, May 12, 2011 at 9:49 AM, Keith Henson <hkeithhenson at gmail.com> wrote:
>> Ground solar currently has an energy payback time of 2-4 years.
>
> Where does this come from? It is certainly not the case for small scale solar.

^ "What is the Energy Payback for PV?" (PDF). National Renewable
Energy Laboratory. http://www.nrel.gov/docs/fy05osti/37322.pdf.
Retrieved 2008-11-24.

If you say that's not the energy payback time, what is?  I.e., how
much energy does it take to make and install PV vs the average power
production per day?

Keith



> -Kelly
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