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 Power Opportunities Fund IV (Delaware)
Holdings, L.P.

Date of Event Requiring Statement: July 19, 2021

Issuer Name and Ticker or Trading Symbol: SHLS


Oaktree Power Opportunities Fund IV, L.P.

By:    Oaktree Power Opportunities Fund IV GP, L.P.
Its:   General Partner

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 IV (Parallel), L.P.

By:    Oaktree Power Opportunities Fund IV GP, L.P.
Its:   General Partner

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 Capital Management, L.P.


By:    /s/ Henry Orren
       --------------------------------
Name:  Henry Orren
Title: Vice President


Oaktree Capital Group, LLC


By:    /s/ Henry Orren
       --------------------------------
Name:  Henry Orren
Title: Vice President


Atlas OCM Holdings, LLC


By:    /s/ Henry Orren
       --------------------------------
Name:  Henry Orren
Title: Vice President


Brookfield Asset Management Inc.


By:    /s/ Kathy Sarpash
       --------------------------------
Name:  Kathy Sarpash
Title: Senior Vice President - Legal & Regulatory


BAM Partners Trust

By:    BAM Class B Partners Inc.
Its:   Trustee

By:    /s/ Kathy Sarpash
       --------------------------------
Name:  Kathy Sarpash
Title: Secretary


Oaktree Capital Group Holdings, L.P.

By:    Oaktree Capital Group Holding GP, LLC
Its:   General Partner

By:    /s/ Henry Orren
       --------------------------------
Name:  Henry Orren
Title: Vice President