Exhibit 10.6


 


THIS PROMISSORY NOTE (“NOTE”)
HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”). THIS NOTE HAS BEEN ACQUIRED
FOR INVESTMENT ONLY AND MAY NOT BE SOLD, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF REGISTRATION OF THE RESALE THEREOF UNDER THE
SECURITIES ACT OR AN OPINION OF COUNSEL REASONABLY SATISFACTORY IN FORM, SCOPE AND SUBSTANCE TO THE COMPANY THAT SUCH REGISTRATION IS
NOT REQUIRED.


 


PROMISSORY NOTE


 


	Principal Amount: up to $300,000	     Dated as of April 27, 2021




(as set forth on the Schedule of Borrowings
attached hereto)


 


ESGEN
Acquisition Corporation, a Cayman Islands exempted company and blank check company (the “Maker”), promises
to pay to the order of ESGEN LLC, a Delaware limited liability company, or its registered assigns or successors in interest (the “Payee”),
or order, the principal sum of up to three hundred thousand U.S. dollars ($300,000) (as set forth on the Schedule of Borrowings attached
hereto) in lawful money of the United States of America, on the terms and conditions described below. All payments on this Note shall
be made by check or wire transfer of immediately available funds or as otherwise determined by the Maker to such account as the Payee
may from time to time designate by written notice in accordance with the provisions of this Note.


 


1.            Principal.
The principal balance of this Note shall be payable by the Maker on the earlier of: (i) December 31, 2021; or (ii) the
date on which Maker consummates an initial public offering of its securities (the “IPO”). The principal balance may
be prepaid at any time. Under no circumstances shall any individual, including but not limited to any officer, director, employee or
shareholder of the Maker, be obligated personally for any obligations or liabilities of the Maker hereunder.


 


2.            Interest.
No interest shall accrue on the unpaid principal balance of this Note.


 


3.           Drawdown
Requests. Maker and Payee agree that Maker may request up to Three Hundred Thousand Dollars ($300,000) for costs reasonably
related to Maker’s initial public offering of its securities. The principal of this Note may be drawn down from time to time
prior to the earlier of: (i) December 31, 2021; or (ii) the date on which Maker consummates an initial public
offering of its securities, upon written request from Maker to Payee (each, a “Drawdown Request”). Each Drawdown
Request must state the amount to be drawn down, and must not be an amount less than One Thousand Dollars ($1,000) unless agreed upon
by Maker and Payee. Payee shall fund each Drawdown Request no later than one (1) business day after receipt of a Drawdown
Request; provided, however, that the maximum amount of drawdowns collectively under this Note is Three Hundred Thousand Dollars
($300,000). No fees, payments or other amounts shall be due to Payee in connection with, or as a result of, any Drawdown Request by
Maker.


 


4.            Application
of Payments. All payments shall be applied first to payment in full of any costs incurred in the collection of any sum due under
this Note, including (without limitation) reasonable attorney’s fees, then to the payment in full of any late charges and finally
to the reduction of the unpaid principal balance of this Note.


 






     


     


    

 


5.            Events
of Default.  The following
shall constitute an event of default (“Event of Default”):


 


(a)            Failure
to Make Required Payments. Failure by Maker to pay the principal amount due pursuant to this Note within five (5) business days
of the date specified above.


  


(b)            Voluntary
Bankruptcy, Etc. The commencement by Maker of a voluntary case under any applicable bankruptcy, insolvency, reorganization, rehabilitation
or other similar law, or the consent by it to the appointment of or taking possession by a receiver, liquidator, assignee, trustee, custodian,
sequestrator (or other similar official) of Maker or for any substantial part of its property, or the making by it of any assignment
for the benefit of creditors, or the failure of Maker generally to pay its debts as such debts become due, or the taking of corporate
action by Maker in furtherance of any of the foregoing.


 


(c)            Involuntary
Bankruptcy, Etc. The entry of a decree or order for relief by a court having jurisdiction in the premises in respect of Maker in
an involuntary case under any applicable bankruptcy, insolvency or other similar law, or appointing a receiver, liquidator, assignee,
custodian, trustee, sequestrator (or similar official) of Maker or for any substantial part of its property, or ordering the winding-up
or liquidation of its affairs, and the continuance of any such decree or order unstayed and in effect for a period of 60 consecutive
days.


 


6.            Remedies.


  


(a)            Upon
the occurrence of an Event of Default specified in Section 5(a) hereof, Payee may, by written notice to Maker, declare this
Note to be due immediately and payable, whereupon the unpaid principal amount of this Note, and all other amounts payable thereunder,
shall become immediately due and payable without presentment, demand, protest or other notice of any kind, all of which are hereby expressly
waived, anything contained herein or in the documents evidencing the same to the contrary notwithstanding.


  


(b)            Upon
the occurrence of an Event of Default specified in Sections 5(b) and 5(c), the unpaid principal balance of this Note, and all other
sums payable with regard to this Note, shall automatically and immediately become due and payable, in all cases without any action on
the part of Payee.


  


7.            Waivers.
Maker and all endorsers and guarantors of, and sureties for, this Note waive presentment for payment, demand, notice of dishonor, protest,
and notice of protest with regard to the Note, all errors, defects and imperfections in any proceedings instituted by Payee under the
terms of this Note, and all benefits that might accrue to Maker by virtue of any present or future laws exempting any property, real
or personal, or any part of the proceeds arising from any sale of any such property, from attachment, levy or sale under execution, or
providing for any stay of execution, exemption from civil process, or extension of time for payment; and Maker agrees that any real
estate that may be levied upon pursuant to a judgment obtained by virtue hereof, on any writ of execution issued hereon, may be sold
upon any such writ in whole or in part in any order desired by Payee.


 


8.            Unconditional
Liability. Maker hereby waives all notices in connection with the delivery, acceptance, performance, default, or enforcement of the
payment of this Note, and agrees that its liability shall be unconditional, without regard to the liability of any other party, and shall
not be affected in any manner by any indulgence, extension of time, renewal, waiver or modification granted or consented to by Payee,
and consents to any and all extensions of time, renewals, waivers, or modifications that may be granted by Payee with respect to the
payment or other provisions of this Note, and agrees that additional makers, endorsers, guarantors, or sureties may become parties hereto
without notice to Maker or affecting Maker’s liability hereunder.


 






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9.            Notices.
All notices, statements or other documents which are required or contemplated by this Agreement shall be: (i) in writing and delivered
personally or sent by first class registered or certified mail, overnight courier service or facsimile or electronic transmission to
the address designated in writing; (ii) by facsimile to the number most recently provided to such party or such other address or
fax number as may be designated in writing by such party; and (iii) by electronic mail, to the electronic mail address most recently
provided to such party or such other electronic mail address as may be designated in writing by such party. Any notice or other communication
so transmitted shall be deemed to have been given on the day of delivery, if delivered personally, on the business day following receipt
of written confirmation, if sent by facsimile or electronic transmission, one (1) business day after delivery to an overnight courier
service or five (5) days after mailing if sent by mail.


 


 


10.          Construction.
THIS NOTE SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH THE LAWS OF NEW YORK, WITHOUT REGARD TO CONFLICT OF LAW PROVISIONS THEREOF.


 


11.          Severability.
Any provision contained in this Note which is prohibited or unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective
to the extent of such prohibition or unenforceability without invalidating the remaining provisions hereof, and any such prohibition
or unenforceability in any jurisdiction shall not invalidate or render unenforceable such provision in any other jurisdiction.


 


12.          Trust
Waiver. Notwithstanding anything herein to the contrary, the Payee hereby waives any and all right, title, interest or claim of any
kind (“Claim”) in or to any distribution of or from the trust account to be established in which the proceeds of the
IPO conducted by the Maker (including the deferred underwriters discounts and commissions) and certain of the proceeds of the sale of
the warrants issued in a private placement to occur in connection with the consummation of the IPO are to be deposited, as described
in greater detail in the registration statement and prospectus to be filed with the Securities and Exchange Commission in connection
with the IPO, and hereby agrees not to seek recourse, reimbursement, payment or satisfaction for any Claim against the trust account
for any reason whatsoever.


  


13.          Amendment;
Waiver. Any amendment hereto or waiver of any provision hereof may be made with, and only with, the written consent of the Maker
and the Payee.


  


14.          Assignment.
No assignment or transfer of this Note or any rights or obligations hereunder may be made by any party hereto (by operation of law or
otherwise) without the prior written consent of the other party hereto and any attempted assignment without the required consent shall
be void.


 





[Signature Page Follows]


 






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IN
WITNESS WHEREOF, Maker, intending to be legally bound hereby, has caused this Note to be duly executed by the undersigned as of
the day and year first above written.


 


	 	ESGEN ACQUISITION CORPORATION
	 	a Cayman Islands exempted company
	 	 	 
	 	By:	/s/ James P. Benson
	 	Name:	James P. Benson
	 	Title:	Authorized Signatory



 


[Signature Page to Promissory Note]


 






     


     


    

 


SCHEDULE OF BORROWINGS


 


The following increases or decreases in this
Promissory Note have been made:


 


	Date of Increase or

 Decrease	 	Amount of decrease in 

Principal Amount of this 

Promissory Note	 	Amount of increase in 

Principal Amount of this

 Promissory Note	 	Principal Amount of this

 Promissory Note following

 such decrease or increase
	 	 	 	 	 	 	 




 






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