Shenzhen Topray Solar announced its IPO prospectus today. The company, a "high-tech enterprise engaged in the R&D, production and sales of amorphous silicon, monocrystakline [sic] silicon, polycrystalline silicon solar cell chips, solar cell modules and other cell application products", will offer 40 million A shares equal to 25 percent of its enlarged stock capital. The company's press release claims it "has become the biggest manufacturer of amorphous silicon solar cells in China and the lead exporter of such products" in 2004, 2005, and 2006.
A quick search through the
Greentech Media - Prometheus Institute thin film report confirms Shenzhen Topray is China's largest a-Si producer, pumping a-Si cells out at 20 MW/year (though with flat projections until 2010). But, given the
beating that solar stocks have been taking, I decided to do a little digging. I turned up a
paper published by Arne Jacobson and Daniel Kammen, of Humboldt State University and Berkeley, on the quality of imported solar cells in Kenya. Perhaps unsurprisingly, Jacobson and Kammen found the "average stabilized performance for both lines of Shenzhen Topray a-Si modules was approximately 6 watts, which is well below the acceptable levels for 14 Watt rated modules." Shenzhen Topray marketed their a-Si modules as performing at 14 Watts. Apparently, the "low performance of these modules may be caused by impurities introduced during production," which lead to "delamination of the active material of the a-Si modules." As a result of Jacobson and Kammen's paper, Kenital and Electric Link - the two major solar cell importers in Kenya - suspended imports and discontinued sales of Shenzhen Topray's products.