|   | A. | Hoku hereby waives Suntech’s obligation to pay the $30 million Main Deposit pursuant to Section 6.2 of the Agreement. |
|--------|----|-----------------------------------------------------------------------------------------------------------------------------|

|   | B. | Hoku hereby acknowledges and agrees that the Stand-by Letter of Credit may be terminated by Suntech. |
|--------|----|------------------------------------------------------------------------------------------------------|

|   | C. | The Parties agree to amend and restate the Pricing Schedule on Appendix 1, and to replace the Pricing Schedule with Appendix 1 to this letter agreement. |
|--------|----|----------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | D. | The Parties agree to shorten the initial Term of the Agreement from ten (10) Years to one (1) Year, and Section 10.1 of the Agreement is amended and restated to read as follows: |
|--------|----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | E. | Notwithstanding anything to the contrary in the Agreement, Suntech’s aggregate purchase obligation during each Year under the Agreement is [*] metric tons, or [*] kilograms. |
|--------|----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | F. | The Parties agree to amend Section 6.5 of the Agreement such that One Million Dollars ($1 million) of the Total Deposit shall be credited on a straight-line basis during the 12-month term of the Agreement, such that Hoku shall credit [*] per kilogram of Product that is shipped during such 12 month period, and the balance of One Million Dollars ($1 million) of the Total Deposit shall be credited against the last invoice for shipments under this Agreement.  In the event that the Agreement continues beyond the first Year, such One Million Dollars ($1 million) of the Total Deposit shall carry-forward and be credited against the last invoice for shipments during such Year.  For the avoidance of doubt, it is the Parties’ mutual intent that One Million Dollars ($1 million) of the Total Deposit shall carry-forward in perpetuity until such time as either Party gives notice to the other Party of its intent to terminate the Agreement pursuant to Section 10.1, or the earlier termination of this Agreement as provided herein. |
|--------|----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

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|   | Steven ChanWuxi Suntech Power Co., Ltd.June 29, 2010Page 2 of 4 |
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|   | G. | Suntech hereby waives Hoku’s obligation to complete the Test Demonstration, the TCS Demonstration, and the Shipment Milestone, and agrees to waive its right to terminate the Agreement pursuant to Section 10.3.2 of the Agreement. |
|--------|----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | H. | Suntech hereby waives Hoku’s obligation to ship Products in calendar year 2009, including, without limitation, Hoku’s obligations pursuant to Sections 1.5, 5, and 10.3.1. |
|--------|----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | I. | Suntech hereby waives Hoku’s obligations to Suntech pursuant to Section 3.1.1 of the Agreement. |
|--------|----|-------------------------------------------------------------------------------------------------------|

|   | J. | Suntech hereby waives Hoku’s obligation to deliver additional specified quantities of Products pursuant to Section 5.1. |
|--------|----|-------------------------------------------------------------------------------------------------------------------------------|

|   | K. | The Parties agree that all references to “December 31, 2009” in Sections 5.1 and 10.3.1, are hereby amended and replaced with “June 30, 2011,” such that Hoku shall have no obligation to ship Products to Suntech prior to June 30, 2011, and Suntech may terminate the Agreement if Hoku has failed to commence shipments by such date. |
|--------|----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | L. | The notice provision of Section 15.4 of the Agreement is amended to include the Parties’ updated contact information, as follows: |
|--------|----|-----------------------------------------------------------------------------------------------------------------------------------------|

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|   | Steven ChanWuxi Suntech Power Co., Ltd.June 29, 2010Page 3 of 4 |
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|   | Steven ChanWuxi Suntech Power Co., Ltd.June 29, 2010Page 4 of 4 |
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| Year            | 1   |
|-----------------|-----|
| Quantity (MT)   | [*] |
| Price/kg ($USD) | [*] |