Confidential Materials omitted and filed separately with the Securities and Exchange Commission.Asterisks denote omissions. The Purchase Contract No. FDCGO7060 for the Core Components of the Electrical Control System of SLI500 Wind Turbine

Exhibit 10.42

Confidential Materials omitted and filed separately with the

Securities and Exchange Commission. Asterisks denote omissions.

The Purchase Contract No. FDCGO7060

for the Core Components of the Electrical Control

System of

SLI500 Wind Turbine

This Purchase Contract is signed between

Sinovel Wind Co., Ltd (hereinafter referred to as Buyer)

Buyer’s Agent: China National Machinery & Equipment Import & Export Corporation (hereinafter referred to as Buyer’s agent)

and

Windtec™ Systemtechnik Handels GmbH in Austria (hereinafter referred to as Seller) in a friendly way.

The contract equipment is used for the purchasing contract of the electrical control system for SL 1500 wind turbine which is signed between Buyer and Seller.

Buyer and Seller agreed as follows:

In construing this contract, the following words and expressions shall have the meanings hereby assigned to them unless otherwise specified in the contract:

1

Each set comprises of:

2

3

Remarks: All the core components shall satisfy with the -45°C low temperature requirements.

Description of PM3000: It is updated on the basis of PM1000; regarding to 1.5MW WT, PM3000 is compatible to PM1000. But the capacity is relatively bigger; The rated current value of LSC is 300A; The rated current value of GSC is 650A; it also has the low voltage ride through function which can be applied to the global grid code (including Europe, North America and Canada etc strictest grid conditions) requirements.

[**] sets with PM1000 and [**] sets with PM3000.

Windtec will supply [**] sets of PM3000 to Sinovel in March, 2008; at the same time the relevant auxiliary elements for implementing the PM3000 into a PM1000 cabinet shall be supplied to Sinovel free of charge.

By January, 2008, Windtec shall supply to Sinovel the detailed modification documentation and control cabinet specification for changing the converter cabinet for implementing PM3000 and LVRT.

In case the test for [**] sets of PM3000 supplied on March, 2008 is failed, Windtec shall supply to Sinovel [**] sets PM1000 and the relevant auxiliary switches to be replaced free of charge; The delivery after July, 2008 for the PM3000 shall be stopped and the later supply for PM3000 shall be replaced by PM1000.

The delivery price for Seller is as follows:

[**] Euro/set regarding the [**] sets of PMI000.

[**] Euro/set regarding the [**] sets of PM3000 delivered in March, 2008.

[**] Euro/set regarding the [**] sets of PM3000.

The total contracting price will be [**] Euros (INCOTERMS 2000, FOB).

PM1000 and PM3000 Converter shall be on shipment from USA (Wisconsin), others from main European seaport or Austria airport.

4

The delivery will be made in batches as per preliminary schedule below (FOB):

Note: Under the precondition that [**] sets core components of the electrical control system shall be purchased in 2008. BUYER will notify Seller three months in advance in writing to revise the plan, in case of any changes to the delivery plan. BUYER shall also notify SELLER six months in advance in writing in case there’s any change for changing the purchased core components from core components with PMI000 to core components with PM3000.

Seller shall provide to the Buyer the certificate and test report of the converter together with the equipment.

Seller must provide the following performance bond to Buyer:

Within 30 days after effectiveness of the contract, Seller shall through Seller’s bank open an irrevocable performance bond in favor of Buyer, for an amount of 100,000.00 Euro. Validity of the guarantee shall be by the end of June 2009.

5

The details refer to the detailed definition in L/C.

Seller shall complete the delivery of Contract Equipment in batches and on time as required in article 6. 2 weeks before shipping, Buyer will be informed about the exact date of delivery.

Unless otherwise specified in the contract, the contract equipment shall be packed by Seller in a properly manner. And necessary measures shall be taken to protect the contract equipment from moisture, rain, rust, corrosion, shock and other damages according to their different characteristics so as to withstand numerous handling, loading and unloading as well as long distance sea and inland transportation.

The following documents shall be enclosed in each package of the Contract Equipment:

Two (2) copies of detailed packing list;

Two (2) of quality certificate;

One (1) copy of technical documentation for relevant Contract Equipment (including the following documentation but not limited to; e.g. the documentation for IGBT module, PLC, control panel, pitch converter, yaw converter and the operational manual for the CAN interface);

Seller shall inspect the Contract Equipment and issue the quality certificates as well as inspection records, all involved expenses shall be for Seller’s account. The quality certificates and inspection records including detail and result of inspection before delivery shall be submitted by Seller to Buyer.

Seller warrants, that the Contract Equipment shall be completely new, advanced in technology and superior in quality, free from any defect in design, material and workmanship, suitable for the use and purpose and in conformity with the technical specification.

6

Seller warrants that the technical documentation shall be complete, clear and correct. Warranty period is 12 months (it shall be 18 months for the converter) after WT has arrived on the wind farm and finished the commissioning, or 18 months (it shall be 24 months for the converter) after the delivery time of Seller, for whichever is earlier.

Warranty means within warranty period in case of any damage or problem of any core components, that the components for replacement will be provided by Seller free of charge, and Seller should ensure timely supply of spare parts. Seller shall correct any such failure either at its option, (i) by repairing any defective or damaged part or parts or the supplied products, or (ii) by making available any necessary repaired or replacement parts. Fault of electrical control system will be diagnosed by Seller and replacement of components will be executed by BUYER, each party at his own expense.

In case of delayed delivery of any shipment, starting from the second week of delay, every week of delay will be charged [**]% of the price of the delayed set as penalty, only a delay for more than 4 days is counted as one complete week Sum of the above mentioned penalty shall not exceed [**]% of the total contract price. Payment of the delayed delivery penalty shall not relieve Seller from the obligation of continuing delivery of relevant contract equipment.

In case Seller fails to make proposals for settling the claims according to any and/or all the ways mentioned above within 14 days after notification of the claim raised by Buyer, Buyer shall have the right to recover the claimed amount from Retention Bond (maximum up to 5% of the total contract price).

7

Neither party shall be held responsible for failure or delay to perform all or any party of this Contract due to flood, fire, earthquake, snowstorm, drought, hailstorm, hurricane, or any other events that are beyond the control of the affected party and could not reasonably be expected at the time of conclusion of the Contract or have been avoided or overcome by such party. However, the party who’s performance is affected by the event of Force Majeure shall give a notice to the other party of its occurrence as soon as possible and a certificate or a document of the occurrence of the Force Majeure event issued by the relative authority or a neutral independent third party shall be sent to the other party not later than (14) days after its occurrence. If the event of Force Majeure event continues for more than (180) days, both parties shall negotiate the performance or the termination of this Contract. In the case of such a termination either party shall bear its own costs, further claims for compensation in connection with the termination shall be excluded.

All disputes arising from, or in connection with the execution of the Contract, shall be settled through friendly discussion between the two Parties. In case no agreement can be reached throughout, the disputes shall be submitted to Chamber of Commerce in Zurich Switzerland, for Arbitration.

Not withstanding any reference to arbitration, the two Parties shall continue to perform their respective obligations under the Contact unless the two Parties otherwise agree.

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Buyer: Sinovel Wind Co., Ltd

Address: Culture Building, No.59, Zhongguancun Street, Haidian, Beijing, China

Post code:  100872

Fax:    (0086) 10-82500072

Tel:    (0086) 10-62515566

Buyer’s Agent: China National Machinery & Equipment Import & Export Corporation

Address: 12/F 178,Guangan Men Wai Street, Xuan Wu District, Beijing, China

Fax:    0086(0)10-63452264

Tel :    0086(0)10-63452250

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Seller: Windtec™ Systemtechnik Handels GmbH

Address: Schleppeplatz 5,9020 Klagenfurt

Fax:    (0043 ###-###-####

Tel:    (0043)463-444604-10

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