Waiver Agreement dated as of May 21, 2018 entered into by Pattern Energy Group LP and the Company

This WAIVER AGREEMENT (the “Waiver Agreement”), dated as of May 21, 2018 is entered into by Pattern Energy Group LP, a Delaware limited partnership (“PEG LP”), and Pattern Energy Group Inc., a Delaware corporation (“PEG Inc.”). Each of PEG LP and PEG Inc. are hereafter referred to individually as a “Party” and collectively as “Parties.”

A.    The Parties entered into the Amended and Restated Purchase Rights Agreement (as amended, supplemented or otherwise modified from time to time, the “PR Agreement”), dated as of June 16, 2017. Capitalized terms used in this letter and not otherwise defined or indicated herein shall have the meanings assigned thereto in the PR Agreement.

B.    Pursuant to the PR Agreement, PEG LP has granted PEG Inc. and its Permitted Assignee a right of first offer on any proposed Transfer by any PEG LP Entity of all or any portion of such entity’s ownership interest in any Project owned by a PEG LP Entity (“ROFO Rights”) and PEG LP has agreed to perform certain obligations in support of such right.

C.    PEG LP indirectly owns (i) all of the equity interest in that operating solar photovoltaic project in Chile known as “Conejo Solar” (the “Conejo Project”), owned directly by Conejo Solar SpA (“Conejo Project Company”), and (ii) certain other early stage development projects in Chile (together with the Conejo Project, the “Subject Projects”) owned indirectly by Pattern Chile Development Holdings SpA (the “Pattern Chile Devco,” and together with the Conejo Project Company and all other subsidiaries of Pattern Chile Devco, the “Subject Project Companies”).

D.    PEG LP is currently negotiating a Stock Purchase Agreement with a potential buyer, located as a result of a sales process run by its advisor, Credit Suisse Securities (USA) LLC, to sell 100% of all of PEG LP’s indirect equity interests in each of the Subject Project Companies (the “Proposed Transaction”).

E.    Having been advised of the Proposed Transaction by PEG LP, PEG Inc. wishes to waive its ROFO Rights and associated rights thereto under the PR Agreement in accordance with the terms hereof.

NOW THEREFORE, in consideration of the foregoing and the mutual agreements contained herein, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto hereby agree as follows:

1.Waiver. PEG Inc., in accordance with the PR Agreement, on its behalf and on behalf of its Permitted Assignee, hereby waives all of its ROFO Rights and any right to performance of other obligations of PEG LP under the PR Agreement in support thereof, that have or may be triggered by the negotiation, documentation and closing of the Proposed Transaction, including without limitation: (a) the right to receive a Project Transfer Notice and associated evaluation material under Section 3.2 of the PR Agreement (beyond that information which has already been delivered to date) for any of the Subject Projects or Subject Project Company equity interests owned indirectly by PEG LP, or (b) the right to make any First Rights Project Offer or a Final Rights Project Offer on the same.

2.Acknowledgement.

3.Notices. Any communications between the parties in connection with the matters set forth herein shall be provided pursuant to Section 6.3 of the PR Agreement.

4.Binding Effect. This Waiver Agreement shall be binding upon and benefit the successors and permitted assigns of PEG LP and PEG Inc.

5.Miscellaneous. Sections 5.1 (Choice of Law; Submission to Jurisdiction; Waiver of Jury Trial), 5.4 (Entire Agreement), and 5.9 (Severability) of the PR Agreement are hereby incorporated into this acknowledgement and agreement, mutatis mutandis, and shall apply as if fully set forth herein.

6.Counterparts. This Waiver Agreement may be executed in one or more duplicate counterparts, and when executed and delivered by all the parties listed below, shall constitute a single binding agreement. The parties agree that delivery of a copy of this Waiver Agreement bearing an original signature by facsimile transmission, by electronic mail in “portable document format” (“.pdf”) form or by any other electronic means intended to preserve the original

graphic and pictorial appearance of a document, or by a combination of such means, shall have the same effect as physical delivery of the paper document bearing the original signature. “Originally signed” or “original signature” means or refers to a signature that has not been mechanically or electronically reproduced.

7.Interpretation. All references in this Waiver Agreement to any document, instrument or agreement (a) shall include all contract variations, change orders, exhibits, schedules and other attachments thereto, and (b) shall include all documents, instruments or agreements issued or executed in replacement or as predecessor thereto, as amended, modified and supplemented from time to time and in effect at any given time.

By:    /s/ Dyann Blaine

Name: Dyann Blaine

Title: Vice President

By:    /s/ Dyann Blaine

Name: Dyann Blaine

Title: Vice President