Document:

EX-10.25

 Exhibit 10.25 

JOINDER AGREEMENT 

THIS JOINDER AGREEMENT, dated as of December 18, 2014 (this “Agreement”), by and among BARCLAYS BANK PLC
(“Barclays”), GOLDMAN SACHS BANK USA (“Goldman Sachs”), MORGAN STANLEY SENIOR FUNDING, INC. (“MSSF”), MORGAN STANLEY BANK, N.A. (“MSB” and together with
MSSF, “Morgan Stanley”), JPMORGAN CHASE BANK, NATIONAL ASSOCIATION (“JPMorgan”), BANK OF AMERICA, N.A. (“Bank of America”), and CITIBANK, N.A. (“Citi”) (each an
“Incremental Lender” and collectively the “Incremental Lenders”), TERRAFORM POWER OPERATING, LLC, a Delaware limited liability company (“Borrower”), TERRAFORM POWER, LLC, a Delaware
limited liability company (“Holdings”), and CERTAIN SUBSIDIARIES OF BORROWER, as Guarantors, and Goldman Sachs, as Administrative Agent. 

RECITALS: 

WHEREAS, reference is hereby made to the Credit and Guaranty Agreement, dated as of July 23, 2014 (as amended by that certain
First Amendment to Credit and Guaranty Agreement dated as of August 25, 2014, and as may be further amended, restated, supplemented or otherwise modified from time to time, the “Credit Agreement”; the terms defined therein and
not otherwise defined herein being used herein as therein defined), by and among Borrower, the Lenders party thereto from time to time, Goldman Sachs, as Administrative Agent and as Collateral Agent, and the other Persons party thereto; and 

WHEREAS, subject to the terms and conditions of the Credit Agreement, Borrower may increase the existing Revolving Commitments and/or
obtain New Term Loan Commitments by entering into one or more Joinder Agreements with the New Revolving Loan Lenders and/or New Term Loan Lenders, as applicable. 

NOW, THEREFORE, in consideration of the premises and agreements, provisions and covenants herein contained, the parties hereto agree as
follows: 
 1. Approval of Credit Documents. Each Incremental Lender (i) confirms that it has received a copy of the Credit Agreement and the
other Credit Documents, together with copies of the financial statements referred to therein and such other documents and information as it has deemed appropriate to make its own credit analysis and decision to enter into this Agreement and it is
sophisticated with respect to decisions to make loans similar to those contemplated to be made hereunder and it is experienced in making loans of such type; (ii) agrees that it will, independently and without reliance upon Administrative Agent
or any other Lender or Agent and based on such documents and information as it shall deem appropriate at the time, continue to make its own credit decisions in taking or not taking action under the Credit Agreement; (iii) appoints and
authorizes Administrative Agent and Collateral Agent to take such action as agent on its behalf and to exercise such powers under the Credit Agreement and the other Credit Documents as are delegated to Administrative Agent and Collateral Agent, as
the case may be, by the terms thereof, together with such powers as are reasonably incidental thereto; and (iv) agrees that it is a Lender under the Credit Agreement and will perform in accordance with its terms all of the obligations which by
the terms of the Credit Agreement are required to be performed by it as a Lender. 

  
 1 

 2. Commitment. Each Incremental Lender hereby severally agrees to commit to provide its respective New
Revolving Loan Commitment and New Term Loan Commitment (the New Term Loans thereunder, each a “Series A New Term Loan”) as set forth on Schedule A annexed hereto, on the terms and subject to the conditions set forth below, on
the Incremental Closing Date. 
 3. Amendment to Section 1.1 of the Credit Agreement. Section 1.1 of the Credit Agreement is hereby amended
as follows: 
  

	 	a.	by amending and restating the definition of “Applicable Margin” in its entirety to read as follows: 

“Applicable Margin” means: 

(i) except as otherwise provided in this definition, (a) with respect to Base Rate Loans, 2.75% per annum and (b) with
respect to Eurodollar Rate Loans, 3.75% per annum; 
 (ii) prior to the Trigger Date, (a) with respect to Base Rate
Loans that are Series A New Term Loans, 3.00% per annum, and (b) with respect to Eurodollar Rate Loans that are Series A New Term Loans, 4.00% per annum;  

(iii) on and after the Trigger Date, (a) with respect to Base Rate Loans that are Series A New Term Loans, 4.00% per annum, and
(b) with respect to Eurodollar Rate Loans that are Series A New Term Loans, 5.00% per annum;  
 (iv) on and after
the Trigger Date until the fourteenth day following the Trigger Date, (a) with respect to Base Rate Loans that are Closing Date Term Loans, 3.375% per annum, and (b) with respect to Eurodollar Rate Loans that are Closing Date
Term Loans, 4.375% per annum; and 
 (v) on and after the fifteenth day following the Trigger Date, (a) with respect to
Base Rate Loans that are Closing Date Term Loans, 4.125% per annum, and (b) with respect to Eurodollar Rate Loans that are Closing Date Term Loans, 5.125% per annum,  

in each case of clauses (iii) through (v) plus (x) an additional 0.25% per annum from and after April 27, 2015 and
(y) an additional 0.25% per annum if, at any time, either (1) Moody’s downgrades the Borrower’s corporate credit rating below Ba3 or (2) S&P downgrades the Borrower’s corporate credit rating below BB-;
and 
 b. by adding the following definitions in proper alphabetical sequence: 

“Incremental Arrangers” means Barclays, Goldman Sachs, Morgan Stanley Senior Funding, Inc., J.P. Morgan Securities LLC,
Merrill Lynch, Pierce, Fenner & Smith Incorporated (or any of its designated affiliates) and Citigroup. 

 “Trigger Date” means February 15, 2015 or such later date as may be agreed
by all Incremental Arrangers. 
 4. Principal Payments. Borrower shall make principal payments on the Series A New Term Loans in consecutive
quarterly installments and at final maturity on the dates and in the amounts set forth below, commencing March 31, 2015: 
  

					
	 Payment Date
	  	Scheduled
Repayment of
Series A New Term Loans	 
	 March 31, 2015
	  	$	687,500	  
	 June 30, 2015
	  	$	687,500	  
	 September 30, 2015
	  	$	687,500	  
	 December 31, 2015
	  	$	687,500	  
	 March 31, 2016
	  	$	687,500	  
	 June 30, 2016
	  	$	687,500	  
	 September 30, 2016
	  	$	687,500	  
	 December 31, 2016
	  	$	687,500	  
	 March 31, 2017
	  	$	687,500	  
	 June 30, 2017
	  	$	687,500	  
	 September 30, 2017
	  	$	687,500	  
	 December 31, 2017
	  	$	687,500	  
	 March 31, 2018
	  	$	687,500	  
	 June 30, 2018
	  	$	687,500	  
	 September 30, 2018
	  	$	687,500	  
	 December 31, 2018
	  	$	687,500	  
	 March 31, 2019
	  	$	687,500	  
	 June 30, 2019
	  	$	687,500	  
	 Maturity Date
	  	 	Remainder	  

 5. Voluntary and Mandatory Prepayments. Scheduled installments of principal of the Series A New Term Loans set forth
above shall be reduced in connection with any voluntary or mandatory prepayments of the Series A New Term Loans in accordance with Sections 2.13, 2.14 and 2.15 of the Credit Agreement, as applicable. 

6. Prepayment Fees. Subject to paragraph 9 below, Borrower agrees to pay to each New Term Loan Lender the following prepayment fees: 

In the event that all or any portion of the Series A New Term Loans are (i) repaid, prepaid, refinanced or replaced through the incurrence
of any bank loan debt financing having an effective interest cost or weighted average yield that is less than the effective 

 
interest cost or weighted average yield of the Series A New Term Loans (or portion thereof) so repaid, prepaid, refinanced or replaced or (ii) repriced or effectively refinanced in
connection with any waiver, consent or amendment directed at, or the result of which would be, the lowering of the effective interest cost or the weighted average yield of the Series A New Term Loans (each of (i) and (ii), a
“Repricing Transaction”)) on or prior to the six-month anniversary of the Incremental Closing Date, such repayment, prepayment, refinancing, replacement or repricing will be made at 101.0% of the principal amount so
repaid, prepaid, refinanced, replaced or repriced. If all or any portion of the Series A New Term Loans held by any Lender is repaid, prepaid, refinanced or replaced pursuant to Section 2.23 of the Credit Agreement on or prior to the six-month
anniversary of the Incremental Closing Date as a result of, or in connection with, such Lender not agreeing or otherwise consenting to any waiver, consent or amendment referred to in clause (ii) above (or otherwise in connection with a
Repricing Transaction), such repayment, prepayment, refinancing or replacement will be made at 101.0% of the principal amount so repaid, prepaid, refinanced or replaced. 

Prior to the Trigger Date, any reference to Section 2.13(c) of the Credit Agreement in any Credit Document will be deemed to include a
reference to paragraph 6 of this Agreement. 
 7. Other Fees. Borrower agrees to pay on the Incremental Closing Date to each New Revolving Loan
Lender a non-refundable closing fee in an amount equal to 1.25% of the stated principal amount of such New Revolving Loan Lender’s New Revolving Loan Commitment. 

8. Use of Proceeds. The proceeds of the Series A New Term Loans will be used (a) to fund the acquisitions previously identified to the Commitment
Parties (as defined in the Commitment Letter referred to on Annex B hereto) as the Q4 Acquisitions or any other acquisition agreed to by the Incremental Arrangers; and (b) to pay related fees and expenses. 

9. Trigger Date Modifications. On the Trigger Date, the following terms shall change automatically: 

 

	 	a.	 the prepayment fees applicable to the Series A New Term Loans as set forth in paragraph 6 hereof will be adjusted such that in the event that all or
any portion of the Series A New Term Loans is (i) repaid, prepaid, refinanced or replaced through the incurrence of any debt financing having an effective interest cost or weighted average yield that is less than the effective interest cost or
weighted average yield of the Series A New Term Loans (or portion thereof) so repaid, prepaid, refinanced or replaced or (ii) repriced or effectively refinanced in connection with any waiver, consent or amendment directed at, or the result of
which would be, the lowering of the effective interest cost or the weighted average yield of the Series A New Term Loans (each of (i) and (ii), a “Trigger Date Incremental Repricing Transaction”)) on or prior to the first
anniversary of the Trigger Date, such repayment, prepayment, refinancing, replacement or repricing will be made at 101.0% of the principal amount so repaid, prepaid, refinanced, replaced or repriced. If all or any portion of the Series A New Term
Loans held by any Lender is repaid, prepaid, refinanced or replaced pursuant to Section 2.23 of the Credit Agreement on or prior to the six-month anniversary of the Trigger Date as a result of, or in connection with, such Lender not

	 	
agreeing or otherwise consenting to any waiver, consent or amendment referred to in clause (ii) above (or otherwise in connection with a Trigger Date Incremental Repricing Transaction), such
repayment, prepayment, refinancing or replacement will be made at 101.0% of the principal amount so repaid, prepaid, refinanced or replaced; 

  

	 	b.	an additional mandatory prepayment requirement will be added to Section 2.14 of the Credit Agreement such that on the date of receipt by Holdings of any Net Equity Proceeds from the issuance of Equity Interests by
Holdings, Borrower shall prepay the Series A New Term Loans in an aggregate amount equal to 100% of such Net Equity Proceeds; 

  

	 	c.	any reference to Section 2.13(c) of the Credit Agreement in any Credit Document will deemed to include paragraph 9(a) of this Agreement; and 

 

	 	d.	the reference to “Sections 2.14(a) through 2.14(c)” in Section 2.14 of the Credit Agreement will be deemed to include paragraph 9(b) of this Agreement. 

10. Proposed Borrowing. This Agreement represents Borrower’s request to borrow Series A New Term Loans from the New Term Loan Lenders as follows
(the “Proposed Borrowing”): 
  

	 	a.	Business Day of Proposed Borrowing: December 18, 2014 

  

	 	b.	Amount of Proposed Borrowing: $275,000,000 

  

									
	 c.      Interest rate option:
	  	 ̈	  	 a.      Base Rate Loan(s)
	  		  	
		  	x	  	 b.      Eurodollar Rate Loans with an initial Interest Period of 1 month
	  		  	

 11. Weighted Average Yield. The Weighted Average Yield applicable to the Series A New Term Loans, as determined by
Borrower and the New Term Loan Lenders, will be: 
  

	 	a.	on the Incremental Closing Date, (a) with respect to Base Rate Loans, 3.00% per annum, and (b) with respect to Eurodollar Rate Loans, 4.00% per annum; 

 

	 	b.	on the Trigger Date, (a) with respect to Base Rate Loans, 4.00% per annum, and (b) with respect to Eurodollar Rate Loans, 5.00% per annum; and 

 

	 	c.	on the fifteenth day following the Trigger Date, (a) with respect to Base Rate Loans, 4.75% per annum, and (b) with respect to Eurodollar Rate Loans, 5.75% per annum, 

in each case of clauses (b) and (c), plus an additional 0.25% per annum if, at any time, either (1) Moody’s downgrades the
Borrower’s corporate credit rating below Ba3 or (2) S&P downgrades the Borrower’s corporate credit rating below BB-. 
 12.
Security. The Series A New Term Loans will be secured by the Collateral on a pari passu basis with the Closing Date Term Loans. 

 13. New Lenders. Each of Morgan Stanley and Bank of America (each, a “New Lender”)
acknowledges and agrees that upon its execution of this Agreement such New Lender shall become a “Lender” under, and for all purposes of, the Credit Agreement and the other Credit Documents, and shall be subject to and bound by the terms
thereof, and shall perform all the obligations of and shall have all rights of a “Lender” thereunder. 
 14. Credit Agreement Governs. This
Agreement is a Credit Document. The Series A New Term Loans hereunder are “New Term Loans” made pursuant to (and as defined in) Section 2.24 of the Credit Agreement and, pursuant to Section 2.24 of the Credit Agreement, the terms
and provisions of the Series A New Term Loans shall, except as otherwise set forth in the Credit Agreement or in this Agreement, be identical to the terms and provisions of the Closing Date Term Loans. For the avoidance of doubt, the Adjusted
Eurodollar Rate with respect to the Series A New Term Loans shall at no time be less than 1.00% per annum. Loans under the New Revolving Loan Commitments hereunder are “New Revolving Loans” made pursuant to (and as defined in)
Section 2.24 of the Credit Agreement and, pursuant to Section 2.24 of the Credit Agreement, the terms and provisions of the New Revolving Loans shall be identical to the Revolving Loans. All obligations in respect of the Series A New Term
Loans, the New Revolving Loan Commitments and the New Revolving Loans are and shall be “Obligations” pursuant to and as defined in the Credit Agreement, and are and shall be secured pursuant to the Collateral Documents. 

15. Borrower’s Certifications. By its execution of this Agreement, the undersigned officer and Borrower hereby certify that: 

 

	 	a.	The representations and warranties contained in the Credit Agreement and the other Credit Documents are true and correct in all material respects on and as of the date hereof to the same extent as though made on and as
of the date hereof, except to the extent such representations and warranties specifically relate to an earlier date, in which case such representations and warranties were true and correct in all material respects on and as of such earlier date;
provided that, in each case, such materiality qualifier shall not be applicable to any representations and warranties that already are qualified or modified by materiality in the text thereof; 

 

	 	b.	No event has occurred and is continuing or would result from the consummation of the Proposed Borrowing contemplated hereby that would constitute a Default or an Event of Default; and 

 

	 	c.	Borrower has performed in all material respects all agreements and satisfied all conditions which the Credit Agreement provides shall be performed or satisfied by it on or before the date hereof. 

16. Borrower Covenant. By its execution of this Agreement, Borrower hereby covenants to make any payments required pursuant to Section 2.18(c) of
the Credit Agreement in connection with the New Revolving Loan Commitments. 
 17. Conditions to Effectiveness. The effectiveness of this Agreement
is subject to the satisfaction of the conditions set forth on Schedule B annexed hereto (the date on which all such 

 
conditions are satisfied and the Series A New Term Loans are funded, the “Incremental Closing Date”). The provisions hereof related to the New Term Loan Commitments shall become
effective immediately prior to the effectiveness of the provisions related to the New Revolving Loan Commitments. 
 18. Eligible Assignee. By its
execution of this Agreement, each Incremental Lender represents and warrants that it is an Eligible Assignee. 
 19. Notice. For purposes of the
Credit Agreement, the initial notice address of each New Lender shall be as set forth below its signature below. 
 20. Non-US Lenders. For each New
Lender that is a Non-US Lender, delivered herewith to Administrative Agent are such forms, certificates or other evidence with respect to United States federal income tax withholding matters as such New Lender may be required to deliver to
Administrative Agent pursuant to Section 2.20(c) of the Credit Agreement. 
 21. Recordation of the New Loans. Upon execution and delivery
hereof, Administrative Agent will record the Series A New Term Loans made by New Term Loan Lenders and the New Revolving Loans made by the New Revolving Loan Lenders, if any, in the Register. 

22. Amendment, Modification and Waiver. This Agreement may not be amended, modified or waived except by an instrument or instruments in writing signed
and delivered on behalf of each of the parties hereto. 
 23. Entire Agreement. This Agreement, the Credit Agreement and the other Credit Documents
constitute the entire agreement among the parties with respect to the subject matter hereof and thereof and supersede all other prior agreements and understandings, both written and verbal, among the parties or any of them with respect to the
subject matter hereof. 
 24. GOVERNING LAW. THIS AGREEMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES HEREUNDER (INCLUDING, WITHOUT
LIMITATION, ANY CLAIMS SOUNDING IN CONTRACT LAW OR TORT LAW ARISING OUT OF THE SUBJECT MATTER HEREOF AND ANY DETERMINATIONS WITH RESPECT TO POST-JUDGMENT INTEREST) SHALL BE GOVERNED BY, AND SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH, THE
LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO CONFLICT OF LAWS PRINCIPLES THEREOF THAT WOULD RESULT IN THE APPLICATION OF ANY LAW OTHER THAN THE LAW OF THE STATE OF NEW YORK. 

25. Severability. In case any provision in or obligation hereunder or under any other Credit Document shall be invalid, illegal or unenforceable in any
jurisdiction, the validity, legality and enforceability of the remaining provisions or obligations, or of such provision or obligation in any other jurisdiction, shall not in any way be affected or impaired thereby. 

26. Counterparts. This Agreement may be executed in any number of counterparts, each of which when so executed and delivered shall be deemed an
original, but all such counterparts together shall constitute but one and the same instrument. 

 [Remainder of page intentionally left blank] 

 IN WITNESS WHEREOF, each of the undersigned has caused its duly authorized officer to
execute and deliver this Joinder Agreement as of             , 2014. 
  

			
	GOLDMAN SACHS BANK USA, as an Incremental Lender
		
	 By:
	 	 /s/ Charles D. Johnston

	 Name: Charles D. Johnston

	 Title: Authorized Signatory

	
	BARCLAYS BANK PLC, as an Incremental Lender
		
	 By:
	 	 /s/ Ann E. Sutton

	 Name: Ann E. Sutton

	 Title: Director

	
	MORGAN STANLEY SENIOR FUNDING, INC., as an Incremental Lender
		
	 By:
	 	 /s/ Henrik Sandstrom

	 Name: Henrik Sandstrom

	 Title: Authorized Signatory

	
	 Notice Address:

	 MS Loan Servicing

1300 Thanier Street Wharf,

Baltimore, MD 21231

Telephone: 443-627-4355

Telecopier: 718-233-2140

msloanservicing@morganstanley.com

	
	

 
			
	MORGAN STANLEY BANK, N.A., as an Incremental Lender
		
	 By:
	 	 /s/ Reagan C. Philipp

	 Name: Reagan C. Philipp

	 Title: Authorized Signatory

	
	JPMORGAN CHASE BANK, NATIONAL ASSOCIATION, as an Incremental Lender
		
	 By:
	 	 /s/ Bridget Killachey

	 Name: Bridget Killachey

	 Title: Vice President

	
	BANK OF AMERICA, N.A., as an Incremental Lender
		
	 By:
	 	 /s/ Patrick Engel

	 Name: Patrick Engel

	 Title: Director

	
	 Notice Address:

	
	 NC1-007-17-18, 100 N. Tryon St.

Charlotte, NC 28255-0001

	
	 Attention: Patrick Engel

	 Telephone: 980-386-3354

	 Facsimile: 980-233-7097

 
			
	 CITIBANK, N.A., as an Incremental Lender

		
	 By:
	 	 /s/ Kirkwood Roland

	 Name: Kirkwood Roland

	 Title: Director & Vice President

 
			
	TERRAFORM POWER, LLC
		
	By:	 	 /s/ Alejandro Hernandez

		 	Name: Alejandro Hernandez
		 	Title: Chief Financial Officer
	
	TERRAFORM POWER OPERATING, LLC
		
	By:	 	 TERRAFORM POWER, LLC,
 its Sole Member and
Sole Manager

		
	By:	 	 /s/ Alejandro Hernandez

		 	Name: Alejandro Hernandez
		 	Title: Chief Financial Officer

 
	
	 SUNEDISON YIELDCO CHILE HOLDCO, LLC
  

SUNEDISON YIELDCO UK HOLDCO 2, LLC
  

SUNEDISON YIELDCO UK HOLDCO 3, LLC
  

SUNEDISON YIELDCO UK HOLDCO 4, LLC
  

SUNEDISON YIELDCO NELLIS HOLDCO, LLC
  

SUNEDISON CANADA YIELDCO, LLC
  

SUNEDISON YIELDCO DG-VIII HOLDINGS, LLC
  

SUNEDISON YIELDCO DG HOLDINGS, LLC
  

SUNEDISON YIELDCO REGULUS HOLDINGS, LLC
  

SUNEDISON YIELDCO ACQ1, LLC
  

SUNEDISON YIELDCO ACQ2, LLC
  

SUNEDISON YIELDCO ACQ3, LLC
  

SUNEDISON YIELDCO ACQ4, LLC
  

SUNEDISON YIELDCO ACQ5, LLC
  

SUNEDISON YIELDCO ACQ6, LLC
  

SUNEDISON YIELDCO ACQ7, LLC
  

SUNEDISON YIELDCO ACQ8, LLC
  

SUNEDISON YIELDCO ACQ9, LLC

 
			
	 SUNEDISON YIELDCO, DGS HOLDINGS, LLC
  

SUNEDISON YIELDCO, ENFINITY HOLDINGS, LLC
  

TERRAFORM POWER IVS I HOLDINGS, LLC
  

TERRAFORM REC ACQ HOLDINGS, LLC
  

TERRAFORM SOLAR HOLDINGS, LLC
  

TERRAFORM LPT ACQ HOLDINGS, LLC
  

TERRAFORM UK1 ACQ HOLDINGS, LLC
  

TERRAFORM CD ACQ HOLDINGS, LLC
  

TERRAFORM SOLAR XVII ACQ HOLDINGS, LLC

		
	By:	 	 TERRAFORM POWER OPERATING, LLC,
 its Sole
Member and Sole Manager

		
	By:	 	 TERRAFORM POWER, LLC,
 its Sole Member and
Sole Manager

		
	By:	 	 /s/ Alejandro Hernandez

		 	Name: Alejandro Hernandez
		 	Title: Chief Financial Officer

			
	 Consented to by:

	
	 GOLDMAN SACHS BANK USA,

as Administrative Agent

		
	 By:
	 	 /s/ Charles D. Johnston

		 	Authorized Signatory

 SCHEDULE A 

TO JOINDER AGREEMENT 
 NEW TERM
LOAN COMMITMENTS 
  

									
	 Name of Lender
	  	Type of Commitment	 	  	Amount	 
	 Barclays Bank PLC
	  	 	New Term Loan Commitment	  	  	$	45,833,333.34	  
	 Goldman Sachs Bank
	  	 	New Term Loan Commitment	  	  	$	45,833,333.34	  
	 Morgan Stanley Senior Funding, Inc.
	  	 	New Term Loan Commitment	  	  	$	45,833,333.33	  
	 JPMorgan Chase Bank, National Association
	  	 	New Term Loan Commitment	  	  	$	45,833,333.33	  
	 Bank of America, N.A.
	  	 	New Term Loan Commitment	  	  	$	45,833,333.33	  
	 Citibank, N.A.
	  	 	New Term Loan Commitment	  	  	$	45,833,333.33	  
		  				  	  
	  
	 
			  	 	Total: $275,000,000	  
		  				  	  
	  
	 

 NEW REVOLVING LOAN COMMITMENTS 
  

									
	 Name of Lender
	  	Type of Commitment	 	  	Amount	 
	 Barclays Bank PLC
	  	 	New Revolving Loan Commitment	  	  	$	4,166,666.67	  
	 Goldman Sachs Bank
	  	 	New Revolving Loan Commitment	  	  	$	4,166,666.67	  
	 Morgan Stanley Bank, N.A.
	  	 	New Revolving Loan Commitment	  	  	$	29,166,666.66	  
	 JPMorgan Chase Bank, National Association
	  	 	New Revolving Loan Commitment	  	  	$	4,166,666.67	  
	 Bank of America, N.A.
	  	 	New Revolving Loan Commitment	  	  	$	29,166,666.66	  
	 Citibank, N.A.
	  	 	New Revolving Loan Commitment	  	  	$	4,166,666.67	  
		  				  	  
	  
	 
			  	 	Total: $75,000,000	  
		  				  	  
	  
	 

 SCHEDULE B 

TO JOINDER AGREEMENT 
 CONDITIONS
PRECEDENT 
  

	1.	Payment of Fees and Expenses. All costs, fees, expenses (including, without limitation, legal fees and expenses) and other compensation contemplated by the Credit Agreement, the Incremental Facilities Commitment
Letter (the “Commitment Letter”) dated October 29, 2014 among the Borrower and the Commitment Parties (as defined therein), and the Fee Letter (as defined in the Commitment Letter) payable to the Commitment Parties, the
Administrative Agent or the Lenders shall, upon the initial borrowing of New Revolving Loans or Series A New Term Loans, have been, or will be substantially simultaneously, paid to the extent due. 

 

	2.	Q4 Acquisitions. The Q4 Acquisitions (other than any acquisition identified to the Commitment Parties as a “drop-down” acquisition) shall have been consummated or will be consummated substantially
concurrently with the funding of the Series A New Term Loans. 

  

	3.	Pro Forma Compliance; Leverage Ratio. Borrower shall be in pro forma compliance with the covenant set forth in Section 6.7(a) of the Credit Agreement as of the last day of the most recently ended Fiscal
Quarter after giving effect to the transactions contemplated by this Agreement. Borrower shall be in pro forma compliance with the covenant set forth in Section 6.7(b) of the Credit Agreement as of the last day of the most recently ended Fiscal
Quarter after giving effect to the New Term Loan Commitments (and, for the avoidance of doubt, prior to giving effect to the New Revolving Loan Commitments). After giving pro forma effect to the New Term Loan Commitments and any related
transactions, the Leverage Ratio shall not exceed 4.50:1.00. 

  

	4.	Definitive Documents; Customary Closing Conditions. The Commitment Parties shall be reasonably satisfied that each of the Borrower and the Guarantors has complied with the following customary closing conditions:
(i) the delivery of customary legal opinions, corporate records and documents from public officials and officer’s certificates; (ii) evidence of authority; (iii) obtaining material third party and material governmental consents
necessary in connection with the Q4 Acquisitions, the related transactions or the financing thereof; (iv) absence of material litigation or material regulatory action adversely affecting the Q4 Acquisitions, the related transactions and the
financing thereof; (v) execution of this Agreement; (vi) delivery of a reaffirmation agreement; (vii) a solvency certificate substantially in the form delivered previously pursuant to the Credit Agreement, certifying that the Borrower
and the Guarantors are, on a consolidated basis after giving effect to the transactions contemplated hereby, solvent; (viii) notice requesting the New Revolving Loan Commitments and the New Term Loan Commitments; and (ix) each Incremental
Lender shall have received at least 5 business days prior to the Incremental Closing Date all documentation and other information required by bank regulatory authorities under applicable “know-your-customer” and anti-money laundering rules
and regulations, including the Patriot Act to the extent requested at least 10 days prior to the Incremental Closing Date. 

  

	5.	Funding Notice. Administrative Agent shall have received a fully executed and delivered Funding Notice executed by an Authorized Officer in accordance with Section 2.1(b) of the Credit Agreement.

  

	6.	Total Utilization of Revolving Commitments. After making the Credit Extensions requested on the Incremental Closing Date, the Total Utilization of Revolving Commitments shall not exceed the Revolving Commitments
then in effect. 

  

	7.	Representations and Warranties. The representations and warranties contained in the Credit Agreement and in the other Credit Documents shall be true and correct in all material respects on and as of the
Incremental Closing Date to the same extent as though made on and as of that date, except to the extent such representations and warranties specifically relate to an earlier date, in which case such representations and warranties shall have been
true and correct in all material respects on and as of such earlier date; provided that, in each case, such materiality qualifier shall not be applicable to any representations and warranties that already are qualified or modified by
materiality in the text thereof. 

  

	8.	No Event of Default or a Default. No event shall have occurred and be continuing or would result from the effectiveness of this Agreement and the transactions to be consummated in connection therewith that would
constitute an Event of Default or a Default. 

  

	9.	No Material Adverse Change. Since March 28, 2014, no event has occurred that has resulted in or could reasonably be expected to result in a material adverse change in or effect on the general affairs,
management, financial position, shareholders’ equity or results of operations of the Borrower and its subsidiaries, as determined by the Incremental Arrangers in their discretion.EX-10.26

 Exhibit 10.26 

COUNTERPART AGREEMENT 

This COUNTERPART AGREEMENT, dated December 18, 2014 (this “Counterpart Agreement”) is delivered pursuant
to that certain Credit and Guaranty Agreement, dated as of July 23, 2014 (as amended by that First Amendment to Credit and Guaranty Agreement dated as of August 25, 2014, and as further amended, supplemented or otherwise modified, the
“Credit Agreement”; the terms defined therein and not otherwise defined herein being used herein as therein defined), by and among TERRAFORM POWER OPERATING, LLC (“Borrower”), TERRAFORM POWER, LLC,
certain Subsidiaries of Borrower, as Guarantors, the Lenders party thereto from time to time, GOLDMAN SACHS BANK USA, as Administrative Agent and Collateral Agent, and the other Persons party thereto. 

Section 1. Pursuant to Section 5.10 of the Credit Agreement, each of the undersigned hereby: 

(a) agrees that this Counterpart Agreement may be attached to the Credit Agreement and that by the execution and delivery
hereof, the undersigned becomes a Guarantor under the Credit Agreement and agrees to be bound by all of the terms thereof; 

(b) represents and warrants that each of the representations and warranties set forth in the Credit Agreement and each other
Credit Document and applicable to the undersigned is true and correct both before and after giving effect to this Counterpart Agreement, except to the extent that any such representation and warranty relates solely to any earlier date, in which case
such representation and warranty is true and correct as of such earlier date; provided that, in each case, such materiality qualifier shall not be applicable to any representations and warranties that already are qualified or modified by
materiality in the text thereof; 
 (c) certifies that no event has occurred or is continuing as of the date hereof, or will
result from the transactions contemplated hereby on the date hereof, that would constitute an Event of Default or a Default; 

(d) agrees to irrevocably and unconditionally guaranty the due and punctual payment in full of all Obligations when the same
shall become due, whether at stated maturity, by required prepayment, declaration, acceleration, demand or otherwise (including amounts that would become due but for the operation of the automatic stay under Section 362(a) of the Bankruptcy
Code, 11 U.S.C. § 362(a)) and in accordance with Section 7 of the Credit Agreement; and 
 (e) (i) agrees that
this counterpart may be attached to the Pledge and Security Agreement, (ii) agrees that the undersigned will comply with all the terms and conditions of the Pledge and Security Agreement as if it were an original signatory thereto,
(iii) grants to Collateral Agent a security interest in all of the undersigned’s right, title and interest in and to all “Collateral” (as such term is defined in the Pledge and Security Agreement) of the undersigned, in each case
whether now or hereafter existing or in which the undersigned now has or hereafter acquires an interest and wherever the same may be located and (iv) delivers to Collateral Agent supplements to all schedules

 
attached to the Pledge and Security Agreement. All such Collateral shall be deemed to be part of the “Collateral” and hereafter subject to each of the terms and conditions of the Pledge
and Security Agreement. 
 Section 2. Each of the undersigned agrees from time to time, upon request of Administrative Agent, to
take such additional actions and to execute and deliver such additional documents and instruments as Administrative Agent may request to effect the transactions contemplated by, and to carry out the intent of, this Counterpart Agreement. Neither
this Counterpart Agreement nor any term hereof may be changed, waived, discharged or terminated, except by an instrument in writing signed by the party (including, if applicable, any party required to evidence its consent to or acceptance of this
Counterpart Agreement) against whom enforcement of such change, waiver, discharge or termination is sought. Any notice or other communication herein required or permitted to be given shall be given pursuant to Section 10.1 of the Credit
Agreement, and all for purposes thereof, the notice address of each of the undersigned shall be the address as set forth on the signature page hereof. In case any provision in or obligation under this Counterpart Agreement shall be invalid, illegal
or unenforceable in any jurisdiction, the validity, legality and enforceability of the remaining provisions or obligations, or of such provision or obligation in any other jurisdiction, shall not in any way be affected or impaired thereby. 

THIS COUNTERPART AGREEMENT SHALL BE GOVERNED BY, AND SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK
WITHOUT REGARD TO CONFLICT OF LAWS PRINCIPLES THEREOF THAT WOULD RESULT IN THE APPLICATION OF ANY LAW OTHER THAN THE LAW OF THE STATE OF NEW YORK. 

[Remainder of page intentionally left blank] 

 IN WITNESS WHEREOF, each of the undersigned has caused this Counterpart Agreement to be
duly executed and delivered by its duly authorized officer as of the date above first written. 
  

			
	TERRAFORM CD ACQ HOLDINGS, LLC,
	
	TERRAFORM 2014 LPT II ACQ HOLDINGS, LLC,
	
	TERRAFORM UK1 ACQ HOLDINGS, LLC
		
	By:	 	 TERRAFORM POWER OPERATING, LLC,
 its Sole
Member and Sole Manager

		
	By:	 	 TERRAFORM POWER, LLC,
 its Sole Member and
Sole Manager

		
	By:	 	 /s/ Alejandro Hernandez

	Name: Alejandro Hernandez
	Title: Chief Financial Officer
	
	Address for Notices:
	
	 12500 Baltimore Avenue
 Beltsville,
MD 20705
 Attention: Sebastian Deschler, General Counsel

	

			
	 ACKNOWLEDGED AND ACCEPTED,
 as of
the date above first written:

	
	 GOLDMAN SACHS BANK USA,
 as
Administrative Agent and Collateral Agent

		
	By:	 	 /s/ Charles D. Johnston

	 Name:
	 	 Charles D. Johnston

	 Title:
	 	 Authorized Signatory

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