Daimler and Linde AG join forces to set on the introduction of hydrogen cars

prizrak said:
They don't, still... They will deteriorate before they get to break even point, that has been the biggest problem with them. Unless you mean 24/7 sunlight, but its not really useful.
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http://www.energybulletin.net/node/17219 states loads of studies ranging from under one year (yeah, right) to 25 years. Most estimates are single-digit years. Solar cells do survive for that long :nod:


As an example of longevity, German manufacturer Q-Cells gives you a 25-year warranty for 80% of the designed power and a 10-year warranty for 90% of the designed power. In other words, they expect their cells to have above 80% power after 25 years - if a solar cell amortizes itself in terms of energy after 5 years for example you can expect five times the energy or more out of it. Even at 80% power after 25 years it still is contributing a lot towards its total energy production.
 
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narf said:
http://www.energybulletin.net/node/17219 states loads of studies ranging from under one year (yeah, right) to 25 years. Most estimates are single-digit years. Solar cells do survive for that long :nod:


As an example of longevity, German manufacturer Q-Cells gives you a 25-year warranty for 80% of the designed power and a 10-year warranty for 90% of the designed power. In other words, they expect their cells to have above 80% power after 25 years - if a solar cell amortizes itself in terms of energy after 5 years for example you can expect five times the energy or more out of it. Even at 80% power after 25 years it still is contributing a lot towards its total energy production.
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I'm going to have to read this later as its a fairly large article.
 
A quick look at the tables would do. The high estimates average out to 7.65 years. The low estimates average out to 2.19 years. The truth might be inbetween.

Also, the data is five years old. Through larger scale production and better technology those figures are bound to only drop.
 
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narf said:
Hydroelectric power does not make more than it took to build?
Same with solar cells, given long running in decent sun they will produce more energy than it took to make them.
Biogas plants also produce more and are very renewable (you gotta take that dump some time...)

I'm sure there are more examples.
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I stand corrected. This is why you don't post stuff when you just returned form 6 hours in an ER.
 
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