Form of Common Stock Certificate

Exhibit 4.1

. ZQ|CERT#|COY|CLS|RGSTRY|ACCT#|TRANSTYPE|RUN#|TRANS# COMMON STOCK COMMON STOCK PO PAR VALUE $0.0001 MR ADD ADD ADD ADD 432 1 A BOX DESIGNATION SAMPLE Certificate Shares 43004, * * 000000 ****************** (IF Number * * * 000000 ***************** ANY) ZQ00000000 **** 000000 **************** Providence, SUNNOVA ENERGY INTERNATIONAL INC. ***** 000000 *************** RI ****** 000000 ************** INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE ** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample SEE REVERSE FOR CERTAIN DEFINITIONS 02940 **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David—THIS CERTIFIES THAT Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr MR . Alexander.David SAMPLE Sample **** Mr. Alexander David &Sample MRS **** Mr. Alexander . SAMPLE David Sample **** Mr. Alexander & David    Sample **** Mr. 3004 Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr Alexander David Sample **** Mr. Alexander David Sample **** CUSIP XXXXXX XX X Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander MR David Sample . SAMPLE **** Mr. Alexander David Sample **** &Mr . Alexander MRS David Sample . SAMPLE **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Alexander David Sample **** Mr. Sample **** Mr. Sample is the owner of **000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares**** 000000**Shares****000000**Shares*** *000000**Shares****000000**Shares****000000**Shares**** 000000**Shares****000000**Shares**** 000000**Shares****000000**Shares****000000**Shares**** 000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares**** 000000**Shares****000000**Shares****000000**Shares****0 THIS CERTIFICATE IS TRANSFERABLE IN 00000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares**** 000000**Shares****000000**Shares****00 ***ZERO HUNDRED THOUSAND 0000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares**** 000000**Shares****000000**Shares****000 CITIES DESIGNATED BY THE TRANSFER 000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000 **Shares****000000**Shares****0000 AGENT, AVAILABLE ONLINE AT 00**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000** Shares****000000**Shares****00000 0**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****00 0000**Shares****000000**Shares****000000**Shares****000000 ZERO HUNDRED AND ZERO*** www.computershare.com **Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000** Shares****000000**Shares****000000* *Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000** Shares****000000**Shares****000000** Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000**Shares****000000** Shares****000000**Shares****000000**S FULLY-PAID AND NON-ASSESSABLE SHARES OF COMMON STOCK OF Sunnova Energy International Inc. (hereinafter called the “Company”), transferable on the books of the Total DTC Company in person or by duly authorized attorney, upon surrender of this Certificate properly endorsed. This Holder Certificate and the shares represented hereby, are issued and shall be held subject to all of the provisions of the Number Certificate of Insurance ID Certificate of Incorporation, as amended, and the By-Laws, as amended, of the Company (copies of which are on Value file with the Company and with the Transfer Agent), to all of which each holder, by acceptance hereof, assents. Transaction Shares CUSIP/IDENTIFIER This Certificate is not valid unless countersigned and registered by the Transfer Agent and Registrar. Numbers ###-###-#### ###-###-#### ###-###-#### ###-###-#### ###-###-#### ###-###-#### ###-###-#### ###-###-#### ###-###-#### ###-###-#### ###-###-#### ###-###-#### Witness the facsimile seal of the Company and the facsimile signatures of its duly authorized officers. DATED DD-MMM-YYYY rgy Inte 6 5 4 3 2 1 e r COUNTERSIGNED AND REGISTERED: 12345678 FACSIMILE SIGNATURE TO COME n na E POR t R A i    a CO T o COMPUTERSHARE TRUST COMPANY, N.A. Num/No v E . I N D n President n o a l TRANSFER AGENT AND REGISTRAR, n I n u 6 5 4 3 2 1 S . c Denom April 1, 2019 . XXXXXX DEL RE 1,000,000 FACSIMILE SIGNATURE TO COME AWA 7 6 5 4 3 2 1 . XX Total 123456789012345 123456 00 XXXXXXXXXX X By Secretary AUTHORIZED SIGNATURE 1234567