Document:

Exhibit
4.51

      Sales
Contract

       

      
        
          
            
              	
                      Contract
      No.: CG120080107

                    
	
                      Signing
      Place: Jiangning District, Nanjing

                    
	
                      Signing
      Date: April 7,
2008

                    

            

          

        

      

    

     

    
      
        
          	
                  The
      Buyer: CEEG (Shanghai) Solar Science & Technology Co.,
      Ltd.

                	 
      	
                  The
      Seller: China Sunergy (Nanjing) Co., Ltd.

                
	
                  Add.:
      No. V-25A, Western Science & Technology Park, Songjiang Industrial
      Park, Shanghai

                	 
      	
                  Add.:
      No. 123, West Focheng Road, Jiangning Economy and Technology Development
      Zone, Nanjing

                
	
                  Tel.:
      021-57850711

                	 
      	
                  Tel.:
      025-52766603

                
	
                  Fax:
      021-57850700

                	 
      	
                  Fax:
      025-52766882

                

        

      

      Through
friendly consultation between both parties and in accordance with the Contract Law of the People’s
Republic of China, the parties hereto agree to enter into the following
contractual terms in connection with the sales of the following goods for mutual
observance and performance:

      

      
        1.
Product
name, specification, type, quantity and amount:

      

      1.1 The Seller provides the Buyer with
268,374
monocrystalline 125 silicon wafers and 56,733
monocrystalline 126 silicon wafers; the circumstances include cutting mark,
stain, edge-breaking, notch, unfilled corner, excessive length and width,
excessive diagonal, excessive thickness, excessive TTV, scuffing, perforation,
arcualia, excessive RRV, oxide film not ground, eccentricity and twin-crystal;
the specific delivery quantity of each specification shall be subject to the
written notice of the Seller; the price is RMB47/wafer (tax
included).

      

      
        2.
Quality
standard

      

      Appearance and electric performance:
Conductive type: P (doped element of boron); crystal orientation:
<100>±3o;
resistivity: 0.5~1, 1~3 and 3~6 Ω.cm; square
size:125±0.5 mm and 126 ±0.5 mm; arc length: 27.5~30.80 mm; thickness:
200 ±20 μm,
220±25 μm;
square wafer angle: 90±0.5° .

       

      Electronics
properties: working lift >10 μs; carbon
content<5×1016 and
oxygen content<1×1018.

      

      
        3.
Terms and
time of payment:

      

      3.1 The Buyer shall wire all payment
for goods to the account designated by the Seller within two working days upon
receipt of the shipping order from the Seller.

      3.2 The Seller shall be responsible for
providing the Buyer with full-amount invoice of the 17% value-added tax within
ten days upon delivery of goods.

      

      
        4.
Packing,
transportation and insurance of goods:

      

      4.1 Packing shall meet the
transportation requirements of the solar-grade monocrystalline
silicon wafers. Any loss arising from improper packing shall be borne by
the Seller.

      4.2 The Buyer shall be responsible for
transportation and cover freight and insurance premium.

      
        
           

        

        
           

          
            

          

        

        
           

        

      

      

      
        5.
Term and
place of delivery

      

      5.1 Time of delivery: Installment is
permitted. The Seller shall fulfill the obligation of delivery within two
working days upon payment by the Buyer. The Buyer shall completely fulfill the
obligation of delivery prior to June 1, 2008.

      5.2 Place of delivery: Both parties
agree that the place of delivery shall be the Seller’s factory

      

      
        6.
Quality
inspection and objection

      

      In case
of any quality defect, the Buyer shall complete appearance inspection and raise
objection in accordance with standards stipulated hereunder within seven days
after the arrival of the goods at the Buyer’s warehouse, and complete quality
inspection and raise objection within thirty days. The Seller shall reply within
seven days upon receipt of written notice on quantity and quality objection.
Where the Seller fails to reply within seven days, it shall be deemed that the
Buyer’s objection has been accepted by the Seller.

      

      
        7.
Reasonable
Consumption Standard and Calculation

      

      It shall
be subject to the actual quantity delivered at the Seller’s
location.

      

      
        8.
Liabilities
for breach

      

      8.1  Within
the quality inspection period, if the type, specifications and technology
parameters of the products delivered by the Seller do not conform to that is
agreed herein, the Buyer shall be entitled to payment refund, replacing of
quality goods or price reduction according to the specific situation of the
products. The Seller shall reply within three days after receiving the Buyer’s
written disposal opinion, otherwise it shall be deemed to consent to the Buyer’s
disposal opinion.

      8.2 If
the Seller delays the delivery, the Seller shall pay to the Buyer a default
penalty of 0.5‰ of the total value of the delayed goods per day.

      8.3 If
the Buyer delays the payment, the Buyer shall pay to the Seller a default
penalty of 0.5‰ of the delayed payment per day

      

      
        9.
Transfer

      

      Neither
party shall transfer all or part of the rights and obligations hereunder without
written approval of the other party.

      

      
        10.Confidentiality

      

      The
parties hereto and their employees, agents, representatives and counsel shall
treat the terms and conditions under this Contract and any its supplementary
agreements as business secrets and shall not disclose the information to any
third party unless upon consent of the other party. Otherwise, the defaulting
party shall compensate as much as twice of the direct or indirect losses of the
other party.

      

      
        11.Force
majeure

      

      If any
party is unable to perform the contract due to any force majeure event, the
affected party shall notify the other party within seven days upon the
occurrence of such event, and shall present written evidence issued by the
relevant authority within fifteen days upon the end of such events and could
partially or wholly exempt from the liability in the light of the impact caused
by force majeure. Where an event of force majeure occurs after the party’s delay
in performance, the defaulting party shall not be exempted from its
liabilities

      
        
           

        

        
           

          
            

          

        

        
           

        

      

      

      
        12.
Integrity
Assurance

      

      12.1 It
shall be viewed as damage to the Buyer’s interest if the Seller and its staff
directly or indirectly give, in the name of the company or an individual, a gift
of money, valuables, securities or provide an improper interest in otherwise
forms to any employee of the Buyer, or if the Seller and its staff conduct
carries out a transaction similar to this Contract, in the name of the company
or an individual, with any employee of the Buyer or any third person introduced
by such employee. The Seller shall compensate as much as twice of the direct or
indirect losses incurred by the Buyer by such reason, and shall be liable
for the liquidated damages as of 20% of the amount of this Contract per breach
(up to RMB 1,000,000).

      12.2 The
integrity report method for the Buyer: Attorney Xu Changming 13851647666, changmin.xu@chinasunergy.com.

      

      
        13.
Prohibiting
commercial fraud

      

      If the
Seller breaches the principle of honesty by providing to the Buyer false
registration materials,  false certificates of qualification or false
information, or by hiding the truth to deceive the Buyer or the end user, it
shall be liable for the liquidated damages as of 20% of the amount of this
Contract (up to RMB 1,000,000). This Article shall not preclude the liabilities
of breach undertaken by the Seller according to other provisions
hereunder.

      

      
        14.
Dispute
resolution

      

      Any and
all disputes arising from validity, performance and interpretation and so on of
the Contract shall first be resolved by the parties through amicable
consultation. In case no settlement can been reached through consultation, the
disputes shall be governed by the people’s court of first instance with
jurisdiction where the Seller is located.  All related fees paid for
litigation (including attorney fees, travel fees, evidence collection fees,
notarization fees and litigation fees, etc) shall be borne by the losing
party.

      

      
        15.
Effective
and miscellaneous

      

      The
Contract shall take effect upon signature and seal by both parties. The printed
text of the content hereof shall prevail. In case of any modification, the
parties hereto shall confirm the modified text by signature and seal. In case
the contract text covers more than one page, seal on the perforation shall be
affixed to such pages.

      The
Contract is in duplicate, with each party holding one counterpart respectively.
The two counterparts shall have the same legal effect. The parties hereto shall
send the original contract text to each other within three working days as of
the date hereof. The fax copy shall have the same effect as the
original.

      Any
matters not covered in this Contract shall be mutually negotiated by both
parties and be set forth in the supplementary agreements, which shall have the
same legal effect as the Contract.

      

      
        
          	
                  The
      Buyer: CEEG (Shanghai) Solar Science & Technology
      Co., Ltd. /Seal/

                	 
      	
                  The
      Seller: China Sunergy (Nanjing) Co., Ltd.

                  /Seal/

                
	
                  Contact
      person:

                	 
      	
                  Contact
      person:

                
	
                  Date:
      April 7, 2008

                	 
      	
                  Date:
      April 7, 2008Exhibit
4.52

    Sales
Contract

    
      
        	
                Contract
      No.:

              
	
                 Signing
      Place: Seller’s location

              
	
                Signing
      Date: Mar. 4, 2008

              

      

    

    

    
      
        	
                The
      Seller: China Sunergy (Nanjing) Co., Ltd.

              	 
      	
                The
      Buyer: CEEG (Shanghai) Solar Science & Technology Co.,
      Ltd.

              
	
                Add.:
      No. 123, West Focheng Road, Economy and Technology Development Zone,
      Jiangning, Nanjing

              	 
      	
                Add.:
      No.68,West Gangde
      Road, Songjiang

                District,
      Shanghai

              
	
                Postal
      code: 211100

              	 
      	
                Postal
      code: 214128

              
	
                Legal
      representative: Lu Tingxiu

              	 
      	
                Legal
      representative: Cai Zhifang

              
	
                Contact
      person: Zou Jianhua

              	 
      	
                Authorized
      agent: Tao Qiang

              
	
                Tel.:
      025-52766714

              	 
      	
                Tel.:
      021-57850711

              
	
                Fax:
      025-52766767

              	 
      	
                Fax:
      021-57850700

              

      

    

    

    Through
friendly consultation between both parties and in accordance with the Contract Law of the People’s
Republic of China, the parties hereto agree to enter into the following
contractual terms in connection with the purchase of the following goods for
mutual observance and performance:

    

    
      
        	
              	
                1.

              	
                Goods
      summary

              

      

    

    ______________________________

    

    
      
        	
              	
                2.

              	
                Time
      and terms of payment:

              

      

    

    After effectiveness of the contract,
the Buyer shall remit payment for goods into the account designated by the
Seller as prescribed in Article 4.3 (The Seller does not accept any other
methods of settlement).

    Account
at Jiangning Sub-branch of China Merchants Bank: 078002380175610001.

    

    
      
        
          3.   
Packing
requirements: The goods
shall be packed in carton boxes suitable for highway transportation so as to
meet the requirements of long-distance and long–time
transportation.

        

      

    

    

    
      
        	
              	
                4.

              	
                Term
      and place of delivery

              

      

    

    4.1 Place of delivery: The place of the
Seller.

    4.2 Should the Buyer ask the Seller to
make the delivery on its behalf, the Buyer shall remit the payment for goods,
together with corresponding freight and insurance premium to the account
designated by the Seller. The transportation risks shall be borne by the
Buyer.

    4.3 Partial shipment is permitted. The
Buyer shall remit the payment for goods of such batch to the account designated
by the Seller within three working days upon receipt of the shipping order
containing specific power list from the Seller according to actual quantity and
amount of the shipment.

    4.4 The Seller shall deliver all goods
of a batch within seven days upon receipt of 100% payment for such batch from
the Buyer.

    4.5 The Seller shall deliver VAT
(value-added tax) invoice to the Buyer within fifteen days upon delivery of such
batch of goods.

    
      
         

      

      
        Page 1 of
4

        
          

        

      

      
         

      

    

    

    
      
        5.    Quality
requirements and technical standards: See Appendix I (i.e. detailed product
specification of China Sunergy (Nanjing) Co., Ltd.. The shipment and
transportation terms in Article 5.4 thereof are
inapplicable).

      

    

    

    
      
        	
              	
                6.

              	
                Quantity
      and quality inspection and
objection:

              

      

    

    The Buyer
shall complete quality inspection as per the standards prescribed hereunder
within seven days from the date of picking up the goods. Any quality claims
shall be issued by Buyer in writing in three days upon detection, and shall be
inspected by a third party agreed upon by both parties.  If the Buyer
fails to raise a claim within 10 days after delivery, the Seller’s products
shall be deemed as qualified.. In case of quantity objection, the Buyer shall
raise the objection within three days after delivery. After the Buyer raises
objection, the Seller shall reply within ten days. Otherwise, it shall be deemed
that such objection has been accepted by the Seller.

    

    
      
        	
              	
                7.

              	
                Transfer

              

      

    

    Neither
party may transfer all or part of rights and obligations hereunder without
written approval of the other party.

    

    
      
        	
              	
                8.

              	
                Confidentiality

              

      

    

    The
parties hereto and their employees, agents, representatives or consultants shall
treat all terms and conditions of the Contract and any supplemental agreement
thereof as trade secret, which shall not be disclosed to any third party without
consent of the other party. Otherwise, the breaching party shall compensate as
much as twice of the direct or indirect losses suffered by the other
party.

    

    
      
        	
              	
                9.

              	
                Force
      majeure

              

      

    

    If any
party hereto is unable to perform the Contract due to the force majeure, such
party shall notify the other party in writing within seven days upon occurrence
of such event, and shall deliver a written certification issued by the relevant
department within fifteen days upon the end of such event, and could be could
partially or wholly exempt from the liability in the light of the impact caused
by force majeure. Where an event of force majeure occurs after the party’s delay
in performance, the defaulting party shall not be released from its
liabilities.

    

    
      
        
          	
                	
                  10.

                	
                  Integrity
      Assurance

                

        

      

    

    It shall
be viewed as damage to the Seller’s interest if the Buyer and its staff directly
or indirectly give, in the name of the company or an individual, a gift of
money, valuables, securities or provide an improper interest in otherwise forms
to any employee of the Seller, or the Buyers as well as its staff does, whether
in the name of the company or an individual, any transaction similar to that
contemplated hereunder with any employee of the Seller or any third party
introduced by any employee of the Seller. The breaching party shall compensate
as much as twice of the direct  or indirect losses incurred by the
other party by such reason, as well as the liquidated damages amounting to 20%
of the total amount of this Contract per breach (up to RMB
1,000,000).

    
      Method of
reporting dishonesty to the Seller: Attorney Xu Changming 13851647666,
changing.xu@chinasunergy.com.

    

    
      
         

      

      
        Page 2 of
4

        
          

        

      

      
         

      

    

    

    
      
        	
              	
                11. 

              	
                Dispute
      resolution

              

      

    

    All
disputes arising from the validity, performance and interpretation of this
Contract shall be first settled through consultation by both
parties.  In case no settlement can be reached through consultation,
both parties agree that the dispute shall be submitted to the people’s court of
jurisdiction where the Buyer is located. The relevant expenses (including legal
cost, travel expenses, notary fees, notarization fees, litigation fees and so
on) shall be borne by the losing party.

    

    
      
        
          	
                	
                  12.

                	
                  Effective
      and miscellaneous

                

        

      

    

    12.1The Contract shall take effect
upon seal by both parties or signature by the special authorized agents. In case
the contract text covers more than one page, seal on the perforation shall be
affixed to such pages.

    12.2 The Contract is in duplicate,
with each party holding one counterpart respectively. Both counterparts shall
have the same legal effect. The parties hereto shall send the original contract
text to each other within three working days as of the date hereof. The fax copy
shall have the same effect as the original.

    12.3 Any matters not covered herein
shall be mutually negotiated by both parties and be set forth in the
supplementary agreements, which shall have the same legal effect as the
Contract.

    12.4 In case of conflict between the
contents of Appendix I (Detailed product specification) and those hereof, the
contents hereof shall prevail.

    

    
      
        	
                The
      Seller: China Sunergy (Nanjing) Co., Ltd.

                (special
      seal for contract)

              	 
      	
                The
      Buyer: CEEG (Shanghai) Solar Science &

                Technology
      Co., Ltd.

              
	
                Signature/seal:
      /s/

              	 
      	
                Signature/seal:
      /s/

              
	
                Date:

              	 
      	
                Date:

              

      

    

     

    
      
         

      

      
        Page 3 of
4

        
          

        

      

      
         

      

    

    

    
      
        
          
            
              	
                      Contract
      No.

                    	
                      Date

                    	
                      Goods
      summary

                    
	
                      XS120080006

                    	
                      January
      7, 2008

                    	
                      See
      table I

                    
	
                      XS120080071

                    	
                      March
      4, 2008

                    	
                      See
      table II

                    

            

          

        

      

    

    

    Table
I

    

    
      
        
          
            
              
                
                  
                    
                      
                        
                          
                            
                              
                                
                                  
                                    
                                      
                                        
                                          
                                            
                                              
                                                
                                                  
                                                    
                                                      	
                                                              Name
      of goods

                                                            	
                                                              Specification
      &

                                                              parameter

                                                            	
                                                              QTY

                                                              (MW)

                                                            	
                                                              Unit

                                                            	
                                                              Unit
      price

                                                              (yuan/w)

                                                            	
                                                              Total
      amount

                                                            
	
                                                              Monocrystalline
      125 cells

                                                            	
                                                              Range
      of conversion efficiency≥16%

                                                            	
                                                              0.5

                                                            	
                                                              MW

                                                            	
                                                              27.5

                                                            	
                                                              About
      RMB 13,650,000

                                                            
	
                                                              Monocrystalline
      125 cells

                                                            	
                                                              Range
      of conversion efficiency
      15.50%~15.75%

                                                            	
                                                              27

                                                            
	
                                                              Total
      amount (in words): Around RMB Thirteen Million Six Hundred and Fifty
      Thousand

                                                            
	
                                                              Remarks:
      The price includes 17% value-added
tax.

                                                            

                                                    

                                                  

                                                

                                              

                                            

                                          

                                        

                                      

                                    

                                  

                                

                              

                            

                          

                        

                      

                    

                  

                

              

            

          

        

      

    

     

    Table
II

     

    
      
        
          
            
              
                
                  
                    
                      
                        
                          
                            
                              
                                
                                  
                                    
                                      
                                        
                                          
                                            
                                              
                                                
                                                  	
                                                          Name
      of goods

                                                        	
                                                          Specification
      &

                                                          parameter

                                                        	
                                                          QTY

                                                          (piece)

                                                        	
                                                          MW

                                                        	
                                                          Unit
      price

                                                          (yuan/w)

                                                        	
                                                          Total
      amount

                                                        
	
                                                          SE
      Monocrystalline 156 cells

                                                        	
                                                          conversion
      efficiency
      17.50%

                                                        	
                                                          20,000

                                                        	
                                                          83400

                                                        	
                                                          30

                                                        	
                                                          RMB
      2,502,000

                                                        
	
                                                          SE
      Monocrystalline 156 cells

                                                        	
                                                          Conversion
      efficiency
      17.25%

                                                        	
                                                          41,000

                                                        	
                                                          168264

                                                        	
                                                          RMB
      5,047,920

                                                        
	
                                                          Total
      Amount

                                                        	
                                                                   
      61,000

                                                        	
                                                          251,664

                                                        	 
      	
                                                          7,549,920

                                                        
	
                                                          Total
      amount (in words): RMB Seven Million Five Hundred and Forty-nine Thousand
      nine hundred and twenty only

                                                        
	
                                                          Remarks:
      The price includes 17% value-added
tax.

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