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" ... After polysilicon comes the solar ingots and solar wafers. China’s share of that worldwide is nearly 100%. ... "
" ... Solar is on the rise in the U.S. But it will be all Made in China unless Washington comes up with something that says – if you want to put solar panels on your house, you can buy them from anywhere. But if you’re the governor of a state that wants to put solar panels on state land to generate electricity, then everything from the polysilicon to the finished product should be made here. If that does not happen, then no, the Keystone Pipeline workers will not be getting jobs making solar panels. ... "
" ... With PERC, Meydbray says, 23% cell efficiencies have been achieved, with average efficiencies at around 21.5% in the tens gigawatts of cells now being produced annually. He believes there is some efficiency runway left with PERC, but 23.5 % is probably the maximum that can be squeezed out. Meydbray also comments that the distinction between mono and polysilicon cells is not as critical as it used to be. “Within these cell technologies, you can use multi or mono cells.” Mono cells used to couple higher efficiencies with higher costs, but “At this point, mono is becoming the same cost as multi, and in some cases is even cheaper,” he says. ... "