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 January 28, 2020.

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/ Henry Orren
	Name: Henry Orren 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/ Henry Orren
	Name: Henry Orren 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/ Henry Orren
	Name: Henry Orren Title: Authorized Signatory
Oaktree Fund GP, LLC
By:	Oaktree Fund GP I, L.P.
Its:	Managing Member
By:	/s/ Henry Orren
	Name: Henry Orren Title: Authorized Signatory
Oaktree Fund GP I, L.P.
By:	/s/ Henry Orren
	Name: Henry Orren Title: Authorized Signatory
Oaktree Capital I, L.P.
By:	/s/ Henry Orren
	Name: Henry Orren Title: Vice President

OCM Holdings I, LLC
By:	/s/ Henry Orren
	Name: Henry Orren Title: Vice President

Oaktree Holdings, LLC
By:	/s/ Henry Orren
	Name: Henry Orren Title: Vice President
Oaktree Capital Group, LLC
By:	/s/ Henry Orren
	Name: Henry Orren Title: Vice President
Oaktree Capital Management, L.P.
By:	/s/ Henry Orren
	Name: Henry Orren Title: Vice President
OCM FIE, LLC
By:	/s/ Henry Orren
	Name: Henry Orren Title: Authorized Signatory