Exhibit 1

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k)(1) promulgated under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree that they are jointly filing this statement on Schedule 13D. Each of them is responsible for the timely filing of such statement and any amendments thereto, and for the completeness and accuracy of the information concerning such person contained therein; but none of them is responsible for the completeness or accuracy of the information concerning the other persons making the filing, unless such person knows or has reason to believe that such information is inaccurate.

IN WITNESS WHEREOF, the undersigned hereby execute this Joint Filing Agreement as of the 12^th day of April, 2021.

ECP ControlCo, LLC
By:	/s/ Christopher M. Leininger
Name:	Christopher M. Leininger
Title:	Partner and General Counsel
Energy Capital Partners III, LLC
By: ECP ControlCo, LLC, its managing member
By:	/s/ Christopher M. Leininger
Name:	Christopher M. Leininger
Title:	Partner and General Counsel
Energy Capital Partners GP III, LP
By: Energy Capital Partners III, LLC, its general partner
By: ECP ControlCo, LLC, its managing member
By:	/s/ Christopher M. Leininger
Name:	Christopher M. Leininger
Title:	Partner and General Counsel
Energy Capital Partners III, LP
By: Energy Capital Partners GP III, LP, its general partner By: Energy Capital Partners III, LLC, its general partner
By: ECP ControlCo, LLC, its managing member
By:	/s/ Christopher M. Leininger
Name:	Christopher M. Leininger
Title:	Partner and General Counsel

Energy Capital Partners III-A, LP
By: Energy Capital Partners GP III, LP, its general partner By: Energy Capital Partners III, LLC, its general partner
By: ECP ControlCo, LLC, its managing member
By:	/s/ Christopher M. Leininger
Name:	Christopher M. Leininger
Title:	Partner and General Counsel
Energy Capital Partners III-B, LP
By: Energy Capital Partners GP III, LP, its general partner By: Energy Capital Partners III, LLC, its general partner
By: ECP ControlCo, LLC, its managing member
By:	/s/ Christopher M. Leininger
Name:	Christopher M. Leininger
Title:	Partner and General Counsel
Energy Capital Partners III-C, LP
By: Energy Capital Partners GP III, LP, its general partner By: Energy Capital Partners III, LLC, its general partner
By: ECP ControlCo, LLC, its managing member
By:	/s/ Christopher M. Leininger
Name:	Christopher M. Leininger
Title:	Partner and General Counsel
Energy Capital Partners III-D, LP
By: Energy Capital Partners GP III, LP, its general partner By: Energy Capital Partners III, LLC, its general partner
By: ECP ControlCo, LLC, its managing member
By:	/s/ Christopher M. Leininger
Name:	Christopher M. Leininger
Title:	Partner and General Counsel

Energy Capital Partners GP III Co-Investment (NESCO), LLC
By: Energy Capital Partners III, LLC, its general partner
By: ECP ControlCo, LLC, its managing member
By:	/s/ Christopher M. Leininger
Name:	Christopher M. Leininger
Title:	Partner and General Counsel
Energy Capital Partners III (NESCO Co-Invest), LLC
By: Energy Capital Partners GP III Co-Investment       (NESCO), LLC
By: Energy Capital Partners III, LLC, its general partner
By: ECP ControlCo, LLC, its managing member
By:	/s/ Christopher M. Leininger
Name:	Christopher M. Leininger
Title:	Partner and General Counsel
NESCO Holdings GP, LLC
By:	/s/ Rahman D’Argenio
Name:	Rahman D’Argenio
Title:	President
NESCO Holdings, LP
By: NESCO Holdings GP, LLC, its general partner
By:	/s/ Rahman D’Argenio
Name:	Rahman D’Argenio
Title:	President
ECP Management GP, LLC
By: ECP ControlCo, LLC, its sole member
By:	/s/ Rahman D’Argenio
Name:	Rahman D’Argenio
Title:	Managing Member

Energy Capital Partners Management, LP
By: ECP Management GP, LLC, its general partner
By: ECP ControlCo, LLC, its sole member
By:	/s/ Rahman D’Argenio
Name:	Rahman D’Argenio
Title:	Managing Member