Cloudy British skies can generate more electric power than all of India .

Question:

about $4/watt — Steve Spence Subscribe to the Renewable Energy Newsletter: http://www.webconx.com/subscribe.htm Renewable Energy Pages – http://www.webconx.com Palm Pilot Pages – http://www.webconx.com/palm X10 Home Automation – http://www.webconx.com/x10 (212) 894-3704 x3154 – voicemail/fax We do not inherit the earth from our ancestors, we borrow it from our children. —

– Hide quoted text — Show quoted text – Solar power This has the greatest potential worldwide and could, in theory, provide 85% of UK energy needs. Germany, with a programme to build 100,000 solar roofs, and Japan, with 70,000 already under way, are ahead of targets. Have you any idea what does Solar panels cost these days?

Response:

about $10/watt fully installed with all the rest of the associated equipment. about $4/watt for panels alone.

Watt or Kilo Watt? I need about 500KW per month for regular eletricity use. Does this mean I have to spend 500X1000X10 dollars to install the equipent to generate the eletricity. Dave

Response:

I need about 500KW per month for regular eletricity use.

Good grief.  Learn the correct units if you want to stop talking nonsense.         Paul

Response:

watt. I think you mean you need 500kwh/month. If the sun shines for 6 hours a day 120 watt panel, producing for 6 hours at 120watts (ain’t gonna happen, but follow the math) = 780 wh/day 780wh/day x 30 days = 23kwh/month you say you need 500kwh/month (think "conservation") 22 panels x 23kwh/month = 506kwh/month best case scenario. At $600 / panel, that’s $13k to put you in the ball park, not including batteries, inverter, wiring, etc. Think more along along the lines of $30k or so (these are rough numbers, probably should be higher) for a complete installed system. — Steve Spence Subscribe to the Renewable Energy Newsletter: http://www.webconx.com/subscribe.htm Renewable Energy Pages – http://www.webconx.com Palm Pilot Pages – http://www.webconx.com/palm X10 Home Automation – http://www.webconx.com/x10 (212) 894-3704 x3154 – voicemail/fax We do not inherit the earth from our ancestors, we borrow it from our children. —

– Hide quoted text — Show quoted text – about $10/watt fully installed with all the rest of the associated equipment. about $4/watt for panels alone. Watt or Kilo Watt? I need about 500KW per month for regular eletricity use. Does this mean I have to spend 500X1000X10 dollars to install the equipent to generate the eletricity. Dave

Response:

  The average house cant use more than 4kw ie 200 kwh a day or 6000 units a month . At $4-$10 a watt that is about $16,000-$40,000 maximum and maybe ten year payback time . If the GOI puts in $100m that would be enough for 5000 homes and would kick start the solar economy .   As the people made savings and put that back into say govt bonds it could be lent out to others and of course mass manufacture would make costs quite small .   I also have a feeling that most of the cost in the West is in the labor and installation and not raw materials for the panels and that India could make them quite cheaply . Solar panels are already used for irrigation and could be used on remote farms..

Response:

 Since 70% of electricity production is lost inevitably in transmission ,

Where did you get the 70% figure? Sounds made up.  a 2-4kw solar roof is as effective as generating 12kw at the power station. Another reason why the Indian govt should give $10-100m as 90% grants for solar roofs in Delhi as experimental basis.. Solar power This has the greatest potential worldwide and could, in theory, provide 85% of UK energy needs. Germany, with a programme to build 100,000 solar roofs, and Japan, with 70,000 already under way, are ahead of targets.

Submitted via WebNewsReader of http://www.interbulletin.com

Response:

200kwh / day would be 256 120watt panels. at just the panel price alone of $600 each, that’s $153,000 1 120 watt panel may produce 780 wh/day. — Steve Spence Subscribe to the Renewable Energy Newsletter: http://www.webconx.com/subscribe.htm Renewable Energy Pages – http://www.webconx.com Palm Pilot Pages – http://www.webconx.com/palm X10 Home Automation – http://www.webconx.com/x10 (212) 894-3704 x3154 – voicemail/fax We do not inherit the earth from our ancestors, we borrow it from our children. —

– Hide quoted text — Show quoted text –   The average house cant use more than 4kw ie 200 kwh a day or 6000 units a month . At $4-$10 a watt that is about $16,000-$40,000 maximum and maybe ten year payback time . If the GOI puts in $100m that would be enough for 5000 homes and would kick start the solar economy .   As the people made savings and put that back into say govt bonds it could be lent out to others and of course mass manufacture would make costs quite small .   I also have a feeling that most of the cost in the West is in the labor and installation and not raw materials for the panels and that India could make them quite cheaply . Solar panels are already used for irrigation and could be used on remote farms..

Response:

How many kerosine operated computers have you seen?

Funny you should mention that.  I’ve seen some talk about micro fuel cells to be used in laptop computers — powered by a small tank of hydrocarbons (like a cigarette lighter).

Response:

How many kerosine operated computers have you seen? Funny you should mention that.  I’ve seen some talk about micro fuel cells to be used in laptop computers — powered by a small tank of hydrocarbons (like a cigarette lighter).

That was for cell phones: http://www.zdnet.com/zdnn/stories/news/0,4586,2180865,00.html For laptops, for now, it seems to be the Advanced Lithium Battery for notebooks. This takes the form of a gel that can be molded to a very thin profile, and provide the same power as larger, heavier l-io batteries. http://www.zdnet.com/zdnn/stories/news/0,4586,2684992,00.html

Response:

How many kerosine operated computers have you seen? Funny you should mention that.  I’ve seen some talk about micro fuel cells to be used in laptop computers — powered by a small tank of hydrocarbons (like a cigarette lighter). That was for cell phones: http://www.zdnet.com/zdnn/stories/news/0,4586,2180865,00.html

Both actually.  Here’s one site, but there are others. "Fuel Cell Supplies Electricity for Laptop" http://www.ise.fhg.de/Products/brennstoffzelle.html

Response:

PFDLearn the correct units It’s not a question of units but of basic concepts. His mistake is identical to confusing speed and distance. BTW: Due to customary convention the unit in a denominator implies averageing over that amount as for example in the choice of W or kWh/a, which except for that convention are the same. So using generally agreed on conventions the following sentence is not only corrct but totally sensible: "But officer, how can you tell me I have driven 60 miles in one hour when in fact I have driven less then 20 miles all day?" — Tsch

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