Document:

Solar
Thin Films

    25
Highland Boulevard

    Dix
Hills, New York 11746

    

    April 7,
2009

    

    Mr. Peter
Lewis

    505 Grove
Street

    Haddonfield,
New Jersey 08033

    

    Dear
Peter:

    

    The
purpose of this letter is amend and modify the terms of your current employment
with Solar Thin Films, Inc. (“Solar Thin”) and its
subsidiaries (collectively, with Solar Thin, the “Company”).  As
you know, your current employment agreement with Solar Thin (the “Lewis Employment
Agreement”) expires on June 1, 2010.  This letter agreement
will serve to amend the terms and conditions of the Lewis Employment Agreement,
as follows:

    

    1.           Resignation.   You
hereby agree to resign as President and Chief Executive Officer of Solar Thin
and the Company effective as of March 31, 2009.   In addition,
you hereby agree to resign as a member of the board of directors of Solar Thin
and the Company effective as of March 31, 2009.

    

    2.           New
Duties.   Effective as of April 1, 2009, you will be
appointed as Group Vice President and General Manager of the Thin Film Equipment
Group of the Company.  The Thin Film Equipment Group shall consist of
the manufacture and sale of amorphous silicon thin film solar module
manufacturing equipment and equipment lines (the “PV
Equipment”).  In such connection, during the remaining Term (as
defined) of your employment, you will devote your full business and professional
time and attention to your duties on behalf of the Company.  You and
your associates will be primarily responsible for generating orders and sales of
PV Equipment.  In addition, you will provide general oversight of the
manufacturing operations of the Kraft Elektronika Zrt and Buda Solar
subsidiaries of Solar Thin, and together with Istvan Krafcsik and Attila
Horvath, be responsible for generating profits for the Thin Film Equipment
Group.  The board of directors of Solar Thin may, from time to time,
request your attendance at board of directors meetings to give reports on the
Thin Film Equipment Group and to answer questions of the board, and you agree to
attend such board meetings as an invited guest.

    

    3.           Term and
Salary.   The term of the Lewis Employment Agreement (the
“Term”) will
expire on June 1, 2010.  For the period commencing April 1, 2009 and
ending September 30, 2009, your annual salary shall be fixed at the rate of
$225,000, payable in monthly installments of $18,750 each.  For the
period commencing October 1, 2009, you monthly salary shall be reduced to the
rate of $180,000 per annum, payable in monthly installments of $15,000
each.  At the expiration of such term of the Lewis Employment
Agreement, we will discuss a mutually acceptable renewal or modification of such
agreement; it being understood, however, that neither you nor the Company will
have any obligation to renew, modify or otherwise extend the term of the Lewis
Employment Agreement beyond June 1, 2010.

    

    4.           Payment of Accrued
Salary.   On the earlier of June 30, 2009 or completion of
an equity financing for Solar Thin in excess of $3.0 million, the Company will
pay to you in one payment all accrued and unpaid salary that is owed under the
Lewis Employment Agreement for all periods through and including the date of
payment of such accrued and unpaid salary.  Failure to pay such amount
will constitute a breach and will be considered Good Cause for Resignation
subject to provisions of the current employment agreement.

     

    
      
        
        

      

      
        – 1
–

        
          

        

      

      
        
        

      

    

     

    5.           Commissions.   In
addition to and not in lieu of your annual salary, you and your associates shall
be entitled to receive a sales commission on all PV Equipment that is sold or on
which Firm Orders (as defined) are received by the Company during the term of
your employment as Group Vice President and General Manager of the Thin Film
Equipment Group of the Company.  As used herein, a “Firm Order” shall
be defined as both (i) the execution of a definitive agreement to purchase and
sell PV Equipment and (ii) the payment of an initial deposit or down payment by
the customer. The commission payable to you shall be equal to:

    

    (a)           a
percentage to be determined by mutual agreement on or before April 30, 2009, of
the “net sales price” (defined as gross selling price, less returns, discounts
and allowances) of such PV Equipment, as and when paid in cash by the customer
to the Company (the “Agreed Percentage”),
less

    

    (b)           the
amount of all other finders fees, commissions and other payments made or payable
by the Company to any other person, firm or corporation who participates in or
assists you in the sale of such PV Equipment (including, without limitation,
Louis Steminak).

    

    In no event shall the Company be
obligated to pay, in connection with the proposed sale of any PV Equipment,
commissions or finders fee in excess of the Agreed Percentage of the net sales
price, unless otherwise approved in advance by the board of directors of Solar
Thin, after full disclosure to the board of all amounts payable to you as well
as all other persons who participated in or assisted you in connection with the
proposed sale of PV Equipment.

    

    Alternatively, the Bonus Agreement,
signed as part of the Buda Merger documents will replace the Commission
arrangement defined above once it becomes effective.

    

    6.           Shares and
Options.

    

    (a)           All
3,000,000 shares of common stock of Solar Thin Power, Inc. owned by you shall
immediately and irrevocably vest and shall not be subject to any risk of
forfeiture by you.

    

    (b)           We
each acknowledge and agree with respect to the stock options entitling you to
purchase up to 3,600,000 shares of Solar Thin common stock (the “Option Shares”), as
follows:

    

    (i)           stock
options for 3,000,000 Options Shares shall be deemed to have fully vested as of
March 31, 2009.  The remaining 600,000 Option Shares that have not
vested shall be forfeited as of March 31, 2009;

    

    (ii)           the
exercise price of all stock options (whether or not Option Shares shall have
vested) are hereby reduced from $0.533 per share to $0.18 per share,
representing 100% of the closing price of Solar Thin common stock as at March
27, 2009; the effective date of this amendment to the Lewis Employment
Agreement; and

    

    (iii)           as
set forth in the Lewis Employment Agreement, all stock options for vested Option
Shares may be exercised by you on a “cashless exercise” basis.

     

    
      
        
        

      

      
        – 2
–

        
          

        

      

      
        
        

      

    

     

    (c)           You
further agree to waive any further rights to receive the 187,617 shares of Solar
Thin common stock previously granted to you annually under the Lewis Employment
Agreement.

    

    7.           Miscellaneous.

    

    (a)           Except
as otherwise amended pursuant to this letter agreement, all of the other terms
and conditions of the Lewis Employment Agreement shall remain in full force and
effect and are incorporated by this reference herein, including, without
limitation, your right to participate in all health benefits and related
programs made available to executives of the Company.

    

    If the foregoing accurately reflects
the substance of our mutual agreement and understanding, please so indicate by
executing and returning a copy of this letter agreement in the space provided
below.

    

    Very
truly yours,

    

    SOLAR
THIN FILMS, INC.

    

    
      
        	
                By:

              	
                /s/ Robert M. Rubin

              
	
                              Robert
      M. Rubin,

              
	
                              Chief
      Financial Officer

              
	 
      
	
                ACCEPTED
      AND AGREED TO,

              
	
                This
      7th
      day of April 2009:

              
	 
      
	
                /s/ Peter Lewis

              
	
                              PETER
      LEWIS

              

      

    

     

    
      
        
        

      

      
        – 3
–FLOOR
PLAN FINANCE AGREEMENT

       

      This Floor Plan Finance Agreement
(“Agreement”) is between AVANTAIR, INC., 4311 General Howard Drive, Clearwater,
FL  33762, Telephone: 727-539-0071, Fax: 727-539-7007, hereinafter
referred to as the "Borrower," and MIDSOUTH SERVICES, INC., or assigns, 800
Druid Road West, Clearwater, FL 33756, Telephone:  727-461-0635, Fax:
727-461-0734, hereinafter referred to as the "Lender."  Escrow agent
will be INSURED AIRCRAFT TITLE SERVICE, 4848 S.W. 36th Street,
Oklahoma City, OK  73179, Telephone:  800-654-4882,
Fax:  405-681-9299, hereinafter referred to as the "Escrow
Agent."

       

      WHEREAS, the Borrower has
certain Piaggio P-180 Aircraft beginning with Unit #46 with Serial Number 1174
and U.S. Registration Number N188SL (“Aircraft”) that they elect to finance
pursuant to this Agreement beginning on or about April 1, 2009 (“Initial
Delivery”).  The Net Purchase Price for the Aircraft is attached as
“Attachment A”;

      

      WHEREAS, Lender shall loan
Borrower the Net Purchase Price on the actual delivery date of each Aircraft
listed on Attachment A (“Delivery Date”) pursuant to the terms and conditions of
this Agreement.

      

      Now
therefore, in consideration of the terms and conditions herein contained, the
parties agree as follows:

      

      
        	
                 
      

              	
                1.

              	
                Term.  The
      term of this Agreement shall commence on the actual date of the Initial
      Delivery for N188SL and shall terminate automatically twelve (12) months
      thereafter or on the date that the Net Purchase Price is paid to Lender
      pursuant to this Agreement, whichever is later
  (“Term”).

              

      

      

      
        	
                 
      

              	
                2.

              	
                Purchase
      Price.  On or
      before each Delivery Date, Lender agrees to pay an amount up to the Net
      Purchase Price as specified on Attachment A for the applicable Aircraft.
      Borrower shall provide Lender with an invoice from Piaggio America
      indicating the balance due for the purchase of the
      Aircraft.  Lender shall have the option to wire the Net Purchase
      Price directly to Piaggio America on the Delivery Date in lieu of using
      the Escrow Account, which shall be determined at their sole
      discretion.  Borrower shall notify Lender at least ten (10) days
      prior to the anticipated Delivery Date of their intention to have Lender
      loan the Net Purchase Price for an Aircraft. In addition, it is agreed
      between the parties that Lender shall only be required to loan the Net
      Purchase Price for one Aircraft at a time pursuant to this Floor Plan
      Finance Agreement.  However, Lender agrees to loan the Net
      Purchase Price for each Aircraft listed on Attachment A assuming that
      Borrower relinquishes the debt for the prior Aircraft prior to Lender
      loaning the Net Purchase Price for the subsequent
  Aircraft.

              

      

      

      
        	
                 
      

              	
                3.

              	
                Transaction
      Fee.   As
      consideration for Lender providing the Net Purchase Price for the Aircraft
      during the Term of this Agreement, Borrower agrees to pay Lender a monthly
      fee in the amount of Eighty Two Thousand Five Hundred U.S. Dollars
      ($82,500.00) (“Transaction Fee”).  The initial Transaction Fee
      shall be due in arrears one month after the Delivery Date of N188SL, which
      shall be on or around May 2, 2009.  After the Delivery Date of
      N188SL, the payment of the Transaction Fee shall be due each month
      thereafter for the remainder of the Term.  Borrower shall remit
      the Transaction Fee to Lender via wire
transfer.

              

      

      

      
        	
                 
      

              	
                4.

              	
                Insurance.  Borrower
      shall maintain adequate insurance on the Aircraft and provide Lender and
      Lender’s financial institution with a Certificate of Insurance listing
      Lender’s financial institution as lien holder and Lender as an additional
      insured.

              

      

       

      
        
           

        

        
          Page 1 of
3

          
            

          

        

        
           

        

      

      
        	
                 
      

              	
                5.

              	
                Title
      and Liens.  Borrower
      agrees that on the Actual Delivery Date, Lender shall be permitted to file
      a lien on the Aircraft securing the amount of the Net Purchase Price paid
      to manufacturer.  On the Actual Delivery Date, Borrower and
      Lender may agree to allow title to transfer from Piaggio America to
      MidSouth Services, Inc, instead of from Piaggio America to Avantair,
      Inc.  All liens imposed on the Aircraft by Lender must be
      removed on or before the date that Borrower repays the Net Purchase Price
      to Lender so that Borrower has free and clear title to the Aircraft,
      unless Borrower is in default by not paying the Transaction Fee after
      given a ten (10) day period to cure the default as set forth in Section 7
      below.

              

      

      

      
        	
                 
      

              	
                6.

              	
                Release
      of Liens.  Prior to
      the date that Borrower repays the Net Purchase Price to Lender (“Avantair
      Actual Delivery Date”), Lender will place any required Release(s) of Lien
      with Escrow Agent.  Lender shall be notified at least seven (7)
      days prior to the Avantair Actual Delivery Date.  Lender hereby
      agrees to fully cooperate with Borrower and Escrow Agent to effect, amend,
      discharge and/or consent to registrations with respect to the Aircraft on
      the International Registry for the benefit of Borrower and/or their
      fractional owners.  Lender also shall provide a letter of
      instruction to the Escrow Agent or any other person designated by Lender
      granting the person authority to release any and all liens on the Aircraft
      that were imposed by Lender in the event of Lender’s death or incapacity
      which could preclude such release of
liens.

              

      

      

      
        	
              	
                7.

              	
                Default.  Upon
      failure of Lender, without default by Borrower, to comply with the terms
      and conditions of this Agreement, Borrower may elect to cancel this
      agreement upon written notice to Lender, however, no breach shall be
      deemed to have occurred until Lender has ten (10) days to cure, which
      shall run from the date of receipt of written notice (e-mail or facsimile
      acceptable).  Borrower retains the right to retain any
      Transaction Fees owed to Lender, not as forfeiture, but as liquidated
      damages for Borrower’s breach of this
Agreement.

              

      

      

      
        	
                 
      

              	
                Upon
      failure of the Borrower, without default of Lender, to comply with the
      terms and conditions of this Agreement, Lender may elect to cancel this
      agreement upon written notice to Borrower, however, no breach shall be
      deemed to have occurred until Borrower has ten (10) days to cure, which
      shall run from the date of receipt of written notice (e-mail or facsimile
      acceptable).  In the event of a breach by Borrower, Lender shall
      be permitted to use any adequate remedy at law to recover damages caused
      by the breach.  Borrower shall position blank bills of sale with
      the Escrow Agent so that title in the Aircraft may be transferred to
      Lender in the event that Borrower’s material default of this Agreement
      remains uncured following Lender’s notice to
  cure.

              

      

      

      
        	
                 
      

              	
                8.

              	
                Excusable
      Delay.  Neither
      Lender nor Borrower shall be liable to each other for any failure or delay
      in performing any of their obligations hereunder caused by an act of God,
      the public enemy, strike or labor dispute, governmental regulation or
      priorities and force majeure not involving the fault or negligence of
      either party.

              

      

      

      
        	
                 
      

              	
                9.

              	
                Assignment.   This
      Agreement may not be assigned and any purported assignment shall be
      without force or legal effect unless the assignment is approved in writing
      by both parties.

              

      

      

      
        
          	
                	
                  10.

                	
                  Amendment.  This
      Agreement shall not be modified or amended except by themutual consent of
      the parties in writing.

                

        

      

      

      
        	
              	
                11.

              	
                Partial
      Illegality.  If any one
      or more provisions of this Agreement shall be found to be illegal or
      unenforceable in any respect, the validity, legality and enforceability of
      the remaining provisions shall not in any way be affected or
      impaired.

              

      

       

      
        
           

        

        
          Page 2 of
3

          
            

          

        

        
           

        

      

      
         

        
          	
                	
                  12.

                	
                  Notification.  For the
      purposes of negotiating and finalizing this Agreement, any document,
      including this Agreement, transmitted by facsimile or e-mail, shall be
      treated in all manner and respects as an original document.  The
      signature of any party on such document shall be considered for these
      purposes as an original signature. Any such document shall be considered
      to have the same binding legal effect as an original document. At the
      request of either party, any such document shall be re-executed by both
      parties in the original form.  In consideration of the promises
      made and value received hereunder, the undersigned parties hereby agree
      that, after a document has been executed and transmitted by facsimile or
      e-mail, neither party shall raise the use of a facsimile or e-mail, or the
      lack of a document bearing an original signature, as a defense to this
      Agreement and forever waive such
defense.

                

        

      

       

      
        	
              	
                13.

              	
                International
      Registry.  Borrower
      and Lender shall comply with the Cape Town Convention Protocol for
      International Registry Regulations and Procedures regarding the
      International Registration of the Aircraft prior to
      closing.  Each party shall bear the cost for registration of
      their company with the International Registry and any fees associated
      therewith.

              

      

       

      
        	
              	
                14. 

              	
                 General.

              

      

      

      
        
          	
                	
                  A.

                	
                  In
      all respects, time shall be of the essence in this
    Agreement.

                

        

      

      

      
        	
              	
                B.

              	
                This
      agreement shall bind and inure to the benefit of the parties hereto and
      their
      executors, administrators, heirs and
  assigns.

              

      

       

      
        	
                 
      

              	
                C.

              	
                This
      agreement may be executed in two or more counterparts, each of which shall
      be deemed an original and shall be effective when executed by both
      parties.

              

      

      

      
        	
                 
      

              	
                D.

              	
                This
      agreement shall supersede the previous Floor Plan Finance Agreement dated
      July 30th,
      2008, which shall automatically terminate on the date of mutual execution
      of this Agreement.

              

      

      

      Signed,
sealed and delivered this 2nd day of
April, 2009.

      
 

      
        
          	
                  BORROWER:

                	
                  LENDER:

                
	
                  AVANTAIR,
      INC.

                	
                  MIDSOUTH
      SERVICES, INC.

                
	 
      	 
      	 
      	 
      
	
                  /s/ Steven Santo

                	 
      	
                  /s/ Hugh Fuller

                	 
      
	
                  Signature

                	
                  Signature

                
	 
      	 
      	 
      	 
      
	
                  C.E.O.

                	 
      	
                  President

                	 
      
	
                  Title

                	
                  Title

                
	 
      	 
      	 
      	 
      
	
                  April 2, 2009 

                	 
      	
                  April 2, 2009

                	 
      
	
                  Date

                	
                  Date

                

        

      

       

      
        
           

        

        
          Page 3 of
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