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

[Kelly Anderson]

On Thu, May 12, 2011 at 5:14 PM, Keith Henson <hkeithhenson at gmail.com> wrote:
> 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?

Ok Keith, I see where I went off the tracks now. You're talking about
ENERGY payback time, and at the time I was thinking about monetary
payback time, which is completely different. My apologies for the
misunderstanding.

-Kelly