Exhibit 99.4

Consent of Independent Registered Public Accounting Firm

We consent to the reference to our Firm under the caption “Experts”, and to the incorporation by reference in the following Registration Statements:

1. Form S-8 nos. 333-232012, 333-177418, 333-213648, 333-213650, and 333-218810;

2. Form F-10 nos. 333-216616 and 333-227245;

3. Form F-3 nos. 333-220059 and 333-227246

of Algonquin Power and Utilities Corp. (the “Company”) and the use herein of our reports dated February 27, 2020, with respect to the consolidated balance sheets as of December 31, 2019 and December 31, 2018 and the consolidated statements of operations, comprehensive income, equity and cash flows for each of the years in the two-year period ended December 31, 2019, and the effectiveness of internal control over financial reporting of the Company as of December 31, 2019, included in this Annual Report on Form 40-F.

/s/ Ernst & Young LLP

Chartered Professional Accountants, Licensed Public Accountants

Toronto, Canada

February 27, 2020