[*] = CERTAIN CONFIDENTIAL INFORMATION CONTAINED IN THIS DOCUMENT, MARKED
BY BRACKETS, HAS BEEN OMITTED FROM PUBLIC FILING PURSUANT TO A REQUEST FOR
CONFIDENTIAL TREATMENT SUBMITTED TO THE U.S. SECURITIES AND EXCHANGE
COMMISSION. THE OMITTED INFORMATION, WHICH HAS BEEN IDENTIFIED WITH THE
SYMBOL “[*],” HAS BEEN FILED SEPARATELY WITH THE U.S. SECURITIES AND EXCHANGE
COMMISSION PURSUANT TO RULE 24B-2 OF THE SECURITIES EXCHANGE ACT OF 1934, AS
AMENDMENT NO. 4 TO
SECOND AMENDED & RESTATED SUPPLY AGREEMENT
This Amendment No. 4 to Second Amended & Restated Supply Agreement (this “ Amendment ”) is entered
into as of the last date set forth on the signature page hereto, by and between Hoku Materials, Inc., a Delaware
corporation (“ HOKU ”), and Solarfun Power Hong Kong Limited, a company registered in Hong Kong (“
SOLARFUN ”). HOKU and SOLARFUN are each a “Party” and together the “Parties” to this Amendment.
Whereas, HOKU and SOLARFUN are Parties to that certain Second Amended & Restated Supply Agreement
dated as of May 13, 2008, (the “Supply Agreement”) as amended by that certain Amendment No. 1 to Second
Amended & Restated Supply Agreement dated as of October 22, 2008, that certain Amendment No. 2 to
Second Amended & Restated Supply Agreement dated as of March 26, 2009, and that certain Amendment No.
3 to Second Amended & Restated Supply Agreement dated as of November 15, 2009 (collectively, the “
Whereas, SOLARFUN has paid $45 million to HOKU as a prepayment for future Product shipments pursuant
to the Agreement;
Whereas, the Parties desire to make certain amendments to the Agreement as hereinafter set forth; and
Whereas, each Party derives a benefit from the amendments set forth herein.
Now therefore, in consideration of the foregoing, and for other good and valuable consideration, the receipt of
which is hereby acknowledged by the Parties, the Parties agree to amend the Agreement as set forth be