This
      security has not been registered under the Securities Act of 1933 (hereinafter
      the “1933 Act”) or under applicable state securities law (hereinafter the “State
      Acts”) and may not be sold, assigned, pledged, transferred or hypothecated,
      whether or not for consideration, by the holder except upon issuance to the
      Company of a favorable written opinion of counsel for the holder or upon
      submission to the Company of such other evidence as may be satisfactory to
      counsel to the Company to the effect that any such sale, assignment, pledge,
      transfer or hypothecation will not be in violation of the 1933 Act or the State
      Acts. 

    


    PROMISSORY
      NOTE

    


    
      	
              $6,250.00

            	
              June
                29, 2007

            


    

    


    FOR
      VALUE
      RECEIVED, Renewable Energy Acquisition Corp., a Nevada corporation (the
“Company”) promises to pay to the order of Larry
      Hopfenspirger
      at
2025
      Nicollet Ave. So., Suite 203, Minneapolis, MN 55404
      (the
“Payee”), at such address, or such other place as the Payee may designate from
      time to time by notice in writing to the Company, the sum of SIX THOUSAND TWO
      HUNDRED FIFTY AND 00/100 DOLLARS ($6,250.00) (the “Principal Sum”) in lawful
      money of the United States of America in accordance with the terms and
      conditions hereinafter set forth: 

    


    A. Payment
      Terms.
      The
      Principal Sum shall be due and payable in one lump sum at the earlier of (i)
      August 31, 2008, or (ii) the consummation of the Company’s initial public
      offering (“IPO”), such date being hereinafter referred to as the “Maturity
      Date”. The Principal Sum shall not bear interest. 

    


    B. Prepayments.
      All or
      any portion of the Principal Sum may be prepaid in whole or in part at any
      time.


    


    C. Late
      Payment.
      In the
      event that any payment due hereunder is not paid within ten (10) days after
      the
      date it is due, Payee shall have the right, in addition to any other rights
      it
      may have hereunder, to collect a late charge with respect to such late payment.
      Such late charge shall be in an amount equal to five percent (5%) of the amount
      of such late payment, and shall be due and payable upon demand. 

    


    D. Security.
      This
      Note, and the Principal Sum, is unsecured. 

    


    E. Events
      of Default.
      If any
      one or more of the following events (hereinafter “Events of Default”) shall
      occur: 

    


    (a) failure
      of the Company to make any required payment under this Note within ten (10)
      days
      after the due date thereof; 

    


    (b) if
      the
      Company (i) commences any proceeding or other action in bankruptcy or seeking
      reorganization or liquidation under the Bankruptcy Code of the Untied States
      or
      of any other jurisdiction, (ii) applies for a receiver, trustee, custodian,
      liquidator or similar official for all or a substantial part of its assets
      or
      makes an assignment for the benefit of creditors, or (iii) admits in writing
      its
      inability to pay its debts as they mature; or 

     

    
      
         

      

      
         

        
          

        

      

      
         

      

    

    


    (c) if
      (i) a
      proceeding or action is commenced against the Company in bankruptcy or seeking
      reorganization or liquidation under the Bankruptcy Code of the United States
      or
      of any other jurisdiction, (ii) a receiver, trustee, custodian, liquidator
      or
      similar official is appointed for all or a substantial part of its assets,
      or
      (iii) a warrant of attachment, execution or similar process against
      substantially all the assets of the Company is issued, and any of such events
      set forth in this subsection (c) continues undismissed, unbonded or undischarged
      for sixty (60) days after written notice of default from Payee; 

    


    then
      the
      Payee of this Note may, by written notice to the Company, declare the unpaid
      Principal Sum to be due and payable and, upon such declaration, the same shall
      become due and payable forthwith, without further demand or notice and such
      amount shall bear a default interest at the rate per annum of eighteen percent
      (18%) (“Default Rate”). 

    


    F. Miscellaneous.
      

    


    (a) If
      the
      Payee is required to institute any action or arbitration to enforce collection
      and payment of this Note, there shall become due and payable from the Company,
      in addition to the unpaid Principal Sum, any late charge, and interest at the
      Default Rate, all costs and expenses of such action or arbitration including
      all
      costs of levy or execution or appellate proceedings or review, or both, and
      including reasonable counsel and litigation fees, and the Payee shall be
      entitled to recover all such additional amounts from the Company. 

    


    (b) No
      delay
      or failure on the part of the Payee of this Note to exercise any power or right
      hereunder, shall operate as a waiver thereof, and no right or remedy of the
      Payee of this Note shall be deemed abridged or modified by any course of
      conduct. 

    


    (c) This
      Note
      shall be governed by and construed in accordance with the laws of the state
      of
      Nevada applicable to agreements made and to be performed in that state without
      giving effect to applicable conflicts of law principles. 

    


    (d) This
      Note
      cannot be changed or terminated orally, but only by a writing signed by the
      Company and the Payee. 

    


    (e) By
      executing this Note the individual signing below represents and warrants that
      he
      has the power and authority to act for and bind the Company and that the Company
      has duly authorized the execution and delivery of this Note, and such individual
      agrees that the Payee is entitled to rely upon such representation and warranty.
      

    


    (f) The
      Payee, without prejudice to any other rights, is authorized to proceed against
      the Company to enforce its rights under this Note. The powers and remedies
      of
      the Payee under this Note shall not be exclusive of any other powers, rights
      or
      remedies available to the Payee. 

     

    
      
         

      

      
        2

        
          

        

      

      
         

      

    

    


    (g) Any
      and
      all notices or other communications required or permitted under this Note shall
      be in writing and shall be deemed given upon (i) personal delivery, (ii) upon
      the next business day if sent by overnight courier service, or (iii) upon the
      third business day next following the mailing of such notice by certified or
      registered mail, return receipt requested, to the respective addresses of the
      Company and the Payee or to such other address as the Company or the Payee
      may
      specify by written notice given as aforesaid. 

    
      	 	 	 
	 	Renewable
              Energy Acquisition Corp.
	 
 	 
 	 
 
	
            	By:  	/s/ 
	 	
              

              Craig
                Laughlin, President

            




    
      
         

      

      
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