Purchase Contract No.FDCG07061



 Exhibit 10.43 
 Confidential Materials omitted and filed separately with the 
 Securities and Exchange Commission.
Asterisks denote omissions. 
 The Purchase Contract No. FDCG07061 
 for the software of SL1500 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.

 Buyer and Seller agreed as follows: 
  

	1.	Scope of Supply: 

 [**] sets of software comprising: 
  

	•	 	 SL1500 software program for pitch converter, yaw converter, IGBT converter and PLCs; according to Technical Specification of SL1500 Wind Turbine.



  

	2.	Prices: 

 The delivery price is CIF Dalian [**] EURO per set. The total
contract price is CIF Dalian [**] EURO. 
  

	3.	Conditions: 

 General Terms of Delivery issued by the Austrian Electrical
and Electronics Industry Association, Ed. Jan. 2002 
  

	4.	Warranty: 

 Warranty period is 12 months after wind turbine has arrived on
the wind farm and finished the commissioning, or 18 months after the delivery (shippment-date), whichever is earlier. 
  

	5.	Delivery: 

 The software of PLC and converter will be sent out by 1 off CD
and/or email per batch, as a valid licence for the number of sets indicated therein. The delivery will be made in batches as per preliminary schedule below (shippment date): 
  

																							
	 Jan
	 	 Feb
	 	 Mar
	 	 Apr
	 	 May
	 	 Jun
	 	 Jul
	 	 Aug
	 	 Sep
	 	 Oct
	 	 Nov
	 	 Dec

	 [**]
	 	[**]	 	[**]	 	[**]	 	[**]	 	[**]	 	[**]	 	[**]	 	[**]	 	[**]	 	[**]	 	[**]









	6.	Payments: 

 95% of each shipment value will be paid by T/T within 14 days
after each shipment date against receipt of the invoice; 
 5% of each shipment value, as the retention bond, shall be paid by T/T within 14 days after the
expiry of the warranty period. 
  

	7.	Taxes: 

 Note: Any applicable withholding tax according to the
Austrian-Chinese-Double-Tax-Treaty will be borne by Windtec in Austria. 
  

			
	Buyer:	  	Sinovel Wind Co., Ltd


			
		
	Address:	  	19/F, Culture Building, No. 59, Zhongguancun Street, Haidian, Beijing, China


			
	Post code:	  	100872


			
	Fax:	  	(0086) 10-82500072
	Tel:	  	(0086) 10-62515566


					
			
	Authorized representative:	  	 /s/ [Illegible]
	  	
		  	(Signature)	  	


					
			
	Signing date:	  	2007.12.24	  	

  

			
	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


					
			
	Authorized representative:	  	 /s/ [Illegible]
	  	
		  	(Signature)	  	


					
			
	Signing date:	  	2007.12.19	  	

  

			
		
	Seller:	  	Windtec Systemtechnik Handels GmbH


			
		
	Address:	  	Schleppeplatz 5,9020 Klageenfurt


			
	Fax:	  	(0043)463-44460444
	Tel:	  	(0043)463-444604-11


					
			
	Authorized representative:	  	 /s/ Gerald Heneberger
	 	/ General Manager
		  	(Signature)	 	


					
			
	Signing date:	  	2007-11-30