Re: OT Gas Prices and the Blame Game

On May 16, 12:07 pm, "Tim Williams" <tmoran...@xxxxxxxxxxx> wrote:
Some rough estimates here:http://webpages.charter.net/dawill/tmoranwms/Solar_Power.html

Tim

--
Deep Fryer: A very philosophical monk.
Website @http://webpages.charter.net/dawill/tmoranwms

"James Arthur" <dagmargoodb...@xxxxxxxxx> wrote in message

news:1220a221-beae-439b-8489-a6d0b19c36fb@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

On May 16, 6:21 am, MooseFET <kensm...@xxxxxxxxx> wrote:

Solar power has reached the point where there is a payback.

Really? Numbers please!

James Arthur

Thanks Tim.

Here's my rough-cut contribution on the economics:

In my area electricity costs $0.14/kWhr,
of which 1/3rd is cost-of-generation (of the power).

The rest of the cost is distribution, maintenance,
debt, administration, and state-regulated profit.

Don Lancaster says a typical USA location gets
sun equivalent to 5 full-strength hours a day.

A 1w solar cell then yields 5w-hr per day, or
1,826 W-hr annually.

My power company would produce that much power
for about $0.08, and sell it to me for $0.26.

Last I checked bare solar cells cost $6/watt,
with inverter/charge controllers and (possibly)
storage adding a great deal to a system cost.

Most sensible economically and ecologically is
to send excess power to the grid during the day,
and draw grid power at night. This avoids the
cost and trouble of local storage.

Figure then, as a very rough guess, a system
cost of 1.5x solar cell cost, or about $9/watt.

The rest and refinement of the calculation--including
cost of capital, differing break-even points for
consumer vs. the power company, etc.-- is left to the
reader.

James Arthur
.

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