EXHIBIT 1

JOINT FILING AGREEMENT

Pursuant to Rule 13(d)-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, each of the undersigned acknowledges and agrees that the foregoing statement on Schedule 13D is filed on behalf of the undersigned and that all subsequent amendments to this statement on Schedule 13D shall be filed on behalf of the undersigned without the necessity of filing additional joint acquisition statements. Each of the undersigned acknowledges that it shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that he or it knows or has reason to believe that such information is inaccurate.

Dated as of August 16, 2019.

Infrastructure and Energy Alternatives, LLC
By:	/s/ Peter Jonna
	Name: Peter Jonna Title: Authorized Signatory
OT POF IEA Preferred B Aggregator, L.P.
By:	OT POF IEA Preferred B Aggregator GP, LLC
Its:	General Partner
By:	Oaktree Power Opportunities Fund III Delaware, L.P.
Its:	Managing Member
By:	Oaktree Fund GP, LLC
Its:	General Partner
By:	Oaktree Fund GP I, L.P.
Its:	Managing Member
By:	/s/ Jamie Toothman
	Name: Jamie Toothman Title: Authorized Signatory

OT POF IEA Preferred B Aggregator GP, LLC
By:	Oaktree Power Opportunities Fund III Delaware, L.P.
Its:	Managing Member
By:	Oaktree Fund GP, LLC
Its:	General Partner
By:	Oaktree Fund GP I, L.P.
Its:	Managing Member
By:	/s/ Jamie Toothman
	Name: Jamie Toothman Title: Authorized Signatory
Oaktree Power Opportunities Fund III Delaware, L.P.
By:	Oaktree Fund GP, LLC
Its:	General Partner
By:	Oaktree Fund GP I, L.P.
Its:	Managing Member
By:	/s/ Jamie Toothman
	Name: Jamie Toothman Title: Authorized Signatory
Oaktree Fund GP, LLC
By:	Oaktree Fund GP I, L.P.
Its:	Managing Member
By:	/s/ Jamie Toothman
	Name: Jamie Toothman Title: Authorized Signatory
Oaktree Fund GP I, L.P.
By:	/s/ Jamie Toothman
	Name: Jamie Toothman Title: Authorized Signatory
Oaktree Capital I, L.P.
By:	/s/ Jamie Toothman
	Name: Jamie Toothman Title: Senior Vice President

OCM Holdings I, LLC
By:	/s/ Jamie Toothman
	Name: Jamie Toothman Title: Senior Vice President
Oaktree Holdings, LLC
By:	/s/ Jamie Toothman
	Name: Jamie Toothman Title: Senior Vice President
Oaktree Capital Group, LLC
By:	/s/ Jamie Toothman
	Name: Jamie Toothman Title: Senior Vice President
Oaktree Capital Group Holdings GP, LLC
By:	/s/ Jamie Toothman
	Name: Jamie Toothman Title: Senior Vice President
Oaktree Capital Management, L.P.
By:	/s/ Jamie Toothman
	Name: Jamie Toothman Title: Authorized Signatory
OCM FIE, LLC
By:	/s/ Jamie Toothman
	Name: Jamie Toothman Title: Authorized Signatory
Oaktree Holdings, Inc.
By:	/s/ Jamie Toothman
	Name: Jamie Toothman Title: Senior Vice President