| 31819 | United States | Carolina Cool, Inc. | 1294, Surfside Industrial Park, Surfside Beach, SC, 29575 | +1 843 2132050 | www.carolinacool.com | | |
| 31820 | United States | Carolina Diversified Builders LLC | 3605 Augusta Hwy Gilbert, SC 29054 | +1 803 9963069 | carolinadiversifiedbuilders.com | | |
| 31821 | United States | Carolina Electrical Service of Charlotte, Inc. | 3366 Poplar Tent Rd., Concord, NC 28027 | +1 704 7210750 | carolinaelectricalandsolarcontractors.com | | |
| 31822 | United States | Carolina Energy Conservation | 9516 Highway 707, Myrtle Beach, SC 29588 | +1 843 7480295 | www.carolinaenergyconservation.com | | |
| 31823 | United States | Carolina Mountain Solar | 114 Depot St, Murphy, NC 28906 | +1 828 8350015 | carolinamountainsolar.com | | |
| 31824 | United States | Carolina Roofing & Vinyl Siding, LLC | 104 State Ave., Suite 100, Clayton, NC, 27520 | +1 919 5537663 | www.carolinaroofing.co | | |
| 31825 | United States | Carolina Solar Energy, LLC (CSE) | 400 West Main, Suite 503, Durham NC, 27701 | +1 919 6826822 | carolinasolarenergy.com | | |
| 31826 | United States | Carr & Duff, Inc. | 2100 Byberry Road, Huntingdon Valley, PA 19006 | +1 215 6724200 | www.carrduff.com | | |
| 31827 | United States | Carrasco Electric | Carteret, NJ 07008 | +1 201 3342585 | carrascoelectricco.com | | |
| 31828 | United States | Carriere-Stumm LLC | 4034 Tchoupitoulas St., New Orleans, LA 70115 | +1 504 8918833 | www.carriere-stumm.com | | |
| 31829 | United States | Carstensen Construction | | +1 612 8402607 | www.roofsmn.com | | |
| 31830 | United States | Cartier Electrical | 4421 Adam Rd. Simi Valley, California 93065 | +1 805 5779817 | https://www.cartierelectric.com | | |
| 31801 | United States | Capistrano Homes and Landscaping, LLC. | 3825 W. Wig Wag Way, Prescott, AZ, 86305 | +1 928 8300124 | www.capistranohomes.com | | |
| 31802 | United States | Capital Aire Systems | 7170 Hwy 49 #8 Lotus, CA, 95651 | +1 530 6260948 | capitalairesystems.com | | |
| 31803 | United States | Capital City Solar | 111 Derek Place, Roseville, CA 95678 | +1 916 2562785 | www.capitalcitysolar.com | SunPower Corp. | |
| 31804 | United States | Capital Control Systems, Inc. | 2384 S. Curry St. Unit #1, Carson City, NV 89703 | +1 775 8833277 | ccsi-nv.com | | |
| 31805 | United States | Capital Electric & Energy Solutions, LLC, Inc. | PO Box 25506, Honolulu, HI 96825 | +1 808 9889473 | www.capitalelectric808.com | | |
| 31806 | United States | Capital Solar & Roofing | 7891 Central Industrial Dr, West Palm Beach, FL 33404 | +1 800 4301772 | capitalsolarandroofing.com | Hanwha Q CELLS GmbH, Mission Solar Energy | SolarEdge Technologies, Ltd. |
| 31807 | United States | Capital Solar Group, LLC | PO Box 21209, Catonsville, MD 21228 | +1 240 2296809 | www.CapitalSolarGroup.com | | |
| 31808 | United States | Capital Sun Group, Ltd. | 8 Sherman Avenue, Takoma Park, MD 20912 | +1 301 2290671 | capitalsungroup.com | | |
| 31809 | United States | CapStone Solutions | 8195 166th Avenue NE, Suite 100, Redmond, Washington 98052 | +1 425 8619332 | www.capstone-sol.com | | |
| 31810 | United States | Carbon Recall LLC | 1400 Riley Road Macon, GA 31201 | +1 866 3073225 | www.carbonrecallmacon.com | | |
| 31811 | United States | Carey Electric | 4207, Adamson St., Show Low, AZ, 85901 | +1 928 3687614 | https://www.careyelectrical.com | | |
| 31812 | United States | Caribou Construction Company | PO Box 221817, Carmel, CA 93922 | +1 831 6241311 | www.caribouconstruction.com | | |
| 31813 | United States | Carlsbad Solar | PO Box 523, Carlsbad, CA 92018 | +1 760 8269226 | carlsbadsolar.com | SolarWorld Industries GmbH | SMA Solar Technology AG |
| 31814 | United States | Carlson Electric LLC | 10469 Wheeler Street, Hayward, Wisconsin, 54843 | +1 715 6345006 | gosolarwi.com | Fronius International GmbH | |
| 31815 | United States | Carlson Solar | 219 North Prospect Roselle, Illinois, 60172 | +1 630 4045342 | carlsonsolarenergy.com | | |
| 31816 | United States | Carnahan Electric, Ltd. | 6391, Capitol Ave., Diamond Springs, CA, 95619 | +1 530 6422476 | www.carnahanelectric.com | | |
| 31817 | United States | Carolina Connections, Inc. | 422, Huffman Mill Rd., Suite 105, Burlington, NC, 27215 | +1 336 5851314 | https://sattvworld.com | | |
| 31818 | United States | Carolina Contractors, Inc. | 30, Hunter Road, Hilton Head, S.C., 29926 | +1 843 6815994 | https://carolinacontractorsinc.com | | |