That is an excessive requirement. It becomes worthwhile when the total energy payback on solar is 10-100x that of manufacture. At the moment it is around 6-8x for PV and rising so there is hope for it yet.
OTOH at my latitude where the sun barely makes 12 degrees above the horizon at midday in mid winter PV is pretty useless. The PV powered "warning bend - skid hazard" roadsigns tend to die a horrible death every winter if they are not totalled first by some speeding nutter.
Kind of sad really - they work brilliantly all summer when there is no frost and lots of sunshine and as soon as winter comes they run out of battery power about an hour after sundown even on sunny days.
Regard, Martin Brown
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They should put little wind motors (generators) on them too then.
T
Tim Watts
On Thu, 10 Jun 2010 13:07:57 -0700, BlindBaby wibbled:
They do round here (southern England). PV + a little windmill to light up a sign that I have never seen lit in the 100's of times I have passed it. Could probably have stuck some lithium batteries in it and still have it good for 5 years!
Tim Watts
Managers, politicians and environmentalists: Nature's carbon buffer.
B
BlindBaby
Can we use them to sop up the oil then?
M
Michael A. Terrell
Those fools in Brussels should have never shut down their Energizer Bunny breeding farm...
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.
T
Tim Watts
On Thu, 10 Jun 2010 18:14:50 -0400, "Michael A. Terrell" wibbled:
One got mixi, so Farmer Rumpey had the lot shot ;->
Tim Watts
Managers, politicians and environmentalists: Nature's carbon buffer.
B
BlindBaby
Idiot. There is only one Energizer Bunny.
M
Michael A. Terrell
He should have had that lead free solder bunch shot, too. Rabies makes people go insane.
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.
B
Bill Bowden
e
lue
om
And there are also slightly broken, chipped solar cells for sale on ebay or
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for about 73 cents a cell (about 1/2 watt each) or maybe $1.45 a watt if you buy 100. They all work 95%, just have small chips on the corners and sides. Each cell is about 1.2 amps at 400mV optimum load.
-Bill
.com/onetribe- Occult Talk Show
J
JosephKK
Best use of politicians i have heard of for a long time. Sounds even more useful than deep frying them.
B
BlindBaby
Then, we could use them to surround the new Devil's Island we build to put the ones that survive the sopping around to keep the prisoners locked in.
R
Rich Grise on Google groups
ou
e
V
You've omitted "Doesn't absorb taxpayer dollars."
Thanks, Rich
D
Don Lancaster
Total average shipping loses are under seven percent. And not currently that big a deal.
Many thanks,
Don Lancaster voice phone: (928)428-4073
Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
rss: http://www.tinaja.com/whtnu.xml email: don@tinaja.com
Please visit my GURU's LAIR web site at http://www.tinaja.com
D
Don Lancaster
The numbers are rather scary.
-- Many thanks,
Don Lancaster voice phone: (928)428-4073 Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552 rss:
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email: snipped-for-privacy@tinaja.com
Please visit my GURU's LAIR web site at
formatting link
D
Don Lancaster
The fastest way to drop the price is to eliminate the subsidies.
Many thanks,
Don Lancaster voice phone: (928)428-4073
Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
rss: http://www.tinaja.com/whtnu.xml email: don@tinaja.com
Please visit my GURU's LAIR web site at http://www.tinaja.com
D
Dirk Bruere at NeoPax
nanosolar claim an energy payback time of 1 month
Dirk
http://www.transcendence.me.uk/ - Transcendence UK
http://www.blogtalkradio.com/onetribe - Occult Talk Show
D
Dirk Bruere at NeoPax
There are some real PV bargains around for engineers who are into DIY solar.
Dirk
http://www.transcendence.me.uk/ - Transcendence UK
http://www.blogtalkradio.com/onetribe - Occult Talk Show
D
Dirk Bruere at NeoPax
Not if it is economy of scale where the bulk of price dropping lies. I doubt whether PV manufacture exceeds (in area) the manufacture of LCD screens.
Dirk
http://www.transcendence.me.uk/ - Transcendence UK
http://www.blogtalkradio.com/onetribe - Occult Talk Show
P
Paul Keinanen
A company listed at some reputable stock exchange must be very careful about the wording of press releases.
A company not listed can claim practically anything.
D
Dirk Bruere at NeoPax
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for references, or we can pop over to First Solar:
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" TEMPE, Ariz.--(BUSINESS WIRE)--Feb. 24, 2009-- First Solar, Inc. (Nasdaq: FSLR) today announced it reduced its manufacturing cost for solar modules in the fourth quarter to 98 cents per watt, breaking the $1 per watt price barrier. ?This achievement marks a milestone in the solar industry?s evolution toward providing truly sustainable energy solutions,? said Mike Ahearn, First Solar chief executive officer. ?First Solar is proud to be leading the way toward clean, affordable solar electricity as a viable alternative to fossil fuels.? First Solar began full commercial operation of its initial manufacturing line in late 2004. From 2004 through today, manufacturing capacity has grown 2,500 percent to more than 500 megawatts in 2008. First Solar?s annual production capacity will double in 2009 to more than 1 gigawatt, the equivalent of an average-sized nuclear power plant. These escalating volumes have been accompanied by a rapid reduction in manufacturing costs. From 2004 through today, First Solar?s manufacturing costs have declined two-thirds from over $3 per watt to less than $1 per watt. First Solar is confident that further significant cost reductions are possible based on the yet untapped potential of its technology and manufacturing process. "
Dirk
http://www.transcendence.me.uk/ - Transcendence UK
http://www.blogtalkradio.com/onetribe - Occult Talk Show
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