EXHIBIT 99.1

This Statement on Form 4 is filed jointly by the Reporting Persons listed below. The principal business address of each of these Reporting Persons is 333 South Grand Avenue, 28th Fl., Los Angeles, CA 90071.

Name of Designated Filer: OAKTREE CAPITAL GROUP, LLC

Date of Event Requiring Statement: March 23, 2021

Issuer Name and Ticker or Trading Symbol: IEA

OCM FIE, LLC
By:	/s/ Henry E. Orren
Name:	Henry E. Orren
Title:	Vice President
OAKTREE CAPITAL MANAGEMENT, L.P.
By:	/s/ Henry E. Orren
Name:	Henry E. Orren
Title:	Vice President
OAKTREE CAPITAL MANAGEMENT GP, LLC
By:	/s/ Henry E. Orren
Name:	Henry E. Orren
Title:	Vice President
ALTAS OCM HOLDINGS, LLC
By:	/s/ Henry E. Orren
Name:	Henry E. Orren
Title:	Vice President
BROOKFIELD ASSET MANAGEMENT INC.
By:	/s/ Jessica Diab
Name:	Jessica Diab
Title:	Vice President, Legal & Regulatory
PARTNERS LIMITED
By:	/s/ Brian Lawson
Name:	Brian Lawson
Title:	President
OT POF IEA PREFERRED B AGGREGATOR, L.P.
By:	/s/ Henry E. Orren
Name:	Henry E. Orren
Title:	Vice President
OT POF IEA PREFERRED B AGGREGATOR GP, LLC
By:	/s/ Henry E. Orren
Name:	Henry E. Orren
Title:	Vice President