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any1
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re: China's surprise holiday present for you
any1   12/22/2010 8:20:36 PM
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While I believe that solar panels are "good" generally speaking, they are not without environmental and social costs. I believe this is especially true when they are being manufactured in China where environmental regulations are lax and working conditions are often poor. I guess if you only consider the short term economic impact we would be better off, but I'm not certain how this all balances out world wide over the longer term and if this would be such a gift to us from China.

Barry Liu
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re: China's surprise holiday present for you
Barry Liu   12/22/2010 6:31:22 PM
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The power density of the solar panel(photovoltaic effect)is in the order of 60 watts per square meter only. Whereas a typical power station has a nominal output in the order of gigawatts. That is to say, it would need 100,000,000 square meters of solar area to generate the same power output as an conventional power station. I do not know the basis of the competition as suggested by Richard's contention. It seems to me that there is no substitution for the good old fossil power plants.

David Ashton
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re: China's surprise holiday present for you
David Ashton   12/22/2010 9:22:17 AM
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Rich - "....or at least over the lifetime of the panels". Given China's reputation for making huge quantities of cheap and nasty stuff, what would the lifetime of such panels be? I am told you can expect 20-25 years from a good panel - if China's only last 5 years they'll have to be VERY cheap to compete, given reinstallation costs. Could you comment?

G-Linden
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re: China's surprise holiday present for you
G-Linden   12/22/2010 5:20:01 AM
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Sorry to ruin the holiday spirit, but if China's predatory pricing drives other companies out of the market, then it may be depriving the world of the innovation source that would otherwise keep the PV industry moving forward.

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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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