Hoku Materials, Inc., a wholly-owned subsidiary of Hoku Scientific, Inc. (HOKU), a diversified alternative energy technology company in China, announced this afternoon the signing of a $284 million polysilicon supply agreement with a subsidiary of Tianwei New Energy Holdings Co., Ltd. that manufactures photovoltaic cells and silicon wafers. The contract calls for delivery of polysilicon to Tianwei over a ten-year period to commence in early 2010. The deal with Tianwei comes quick on the heels of a similar contract announced last week between Hoku and Kinko Energy valued at $298 million over ten years. Tianwei will make an initial $15 million deposit to Hoku in August 2008, and additional prepayments of $15 million by November 15, 2008, and $10 million by January 15, 2009. Tianwei will pay Hoku an additional $5 million upon arrival of the first shipment of polysilicon.