| 32131 | United States | Corrales Solar | 1453 W Ella Dr., Corrales, NM 87048 | +1 505 6159388 | corralessolar.com | | |
| 32132 | United States | Correct Solar Installation | | +1 678 8787971 | www.correctsolar.com | | |
| 32133 | United States | CorrEnergy Group | 200 Broadhollow Rd. #207, Melville, NY 11747 | +1 631 4603040 | correnergygroup.com | | |
| 32134 | United States | Cosmic Renovation & Roofing | 1070, Concord Ave #150, Concord, CA, 94520 | +1 877 6539899 | https://www.cosmicrenovation.com | | |
| 32135 | United States | Cosmic Solar, Inc. | 943 Poinsettia Ave, Suite #401, Vista, CA 92081 | +1 760 7491111 | www.cosmicsolar.com | SunPower Corp. | SMA Solar Technology AG, Enphase Energy, Inc., SolarEdge Technologies, Ltd. |
| 32136 | United States | Costa Rica Solar | | +1 506 24460543 | www.cr-solar.com | | |
| 32137 | United States | Cottongim Services | 145, South Ridge Ave., Tifton, GA, 31794 | +1 229 5161025 | https://www.cottongim.net | | |
| 32138 | United States | Cotuit Solar LLC | 3800 Falmouth Road, Marstons Mills, MA 02648 | +1 508 4288442 | cotuitsolar.com | Canadian Solar Inc., S-Energy Co., Ltd., LG Electronics, Inc. | Enphase Energy, Inc., SolarEdge Technologies, Ltd. |
| 32139 | United States | Coty Owens Electric LLC | 137 Souder Drive, Hurst, TX 76053 | +1 817 2800120 | www.cotyowenselectric.com | | |
| 32140 | United States | Countrycrest Enterprises | Fountain Run, KY, 42133 | +1 270 5906756 | countrycrestenterprises.com | | |
| 32141 | United States | Countrywide Contracting Inc. | Stillwater, MN 55082 | +1 651 5287451 | roofingcwc.com | | |
| 32142 | United States | Cowboy Solar | | +1 6822 393011 | www.cowboyofthesun.com | Enphase Energy, Inc. | |
| 32143 | United States | Cox Construction Co. | 1210 Distribution Way Vista, CA 92081 | +1 760 7279020 | www.coxconstructionco.com | | |
| 32144 | United States | Cox Roofing | 7606 Eastern Avenue, Baltimore, MD 21224 | +1 443 4495273 | https://coxroofing.biz | | |
| 32145 | United States | CPS Electric Motors | 454 E Racine St., Jefferson, WI 53549 | +1 920 6745301 | https://cpselectricmotors.com | | |
| 32146 | United States | Competitive Power Ventures Holdings, LLC | 8403 Colesville Road, Suite 915, Silver Spring, MD 20910 | +1 40 7232300 | www.cpv.com | | |
| 32147 | United States | CQI Associates, LLC | 10729-B Birmingham Way, Woodstock, MD 21163 | +1 410 7400667 | www.cqiassociates.com | | |
| 32148 | United States | Clark's Quality Roofing | 334 West Anderson Ave, Murray, Utah 84107 | +1 801 2663575 | clarkroof.com | | |
| 32149 | United States | CR Lighting & Electric, Inc. | 380 N. King St. Layton, UT 84041 | +1 801 5441533 | crsolarinstallations.com | | |
| 32150 | United States | Craft Builders Construction | 845 Black Walnut Wy, Morgan Hill, CA 95037 | +1 888 4976999 | craftbuilders.net | | |
| 32151 | United States | Craft Electric Co., Inc. | 4345 Vanderbilt Place, Birmingham, AL 35217 | +1 205 8414141 | www.craft-electric.com | | |
| 32152 | United States | Craft Electric & Maintenance | 2420 Eastgate Place, Suite A, Snellville, Georgia 30078 | +1 770 9799293 | craftelectricinc.com | | |
| 32153 | United States | Cransten Energy | | +1 800 7186015 | https://cransten.com | | |
| 32154 | United States | Craven Electrical Services, Inc. | 4811 Bethlehem Rd., Richmond, VA 23230 | +1 804 2667000 | www.cravenelectricinc.com | | |
| 32155 | United States | Crawford Electric | 143 Hwy. 201 N. Mountain Home, AR 72653 | +1 870 4254518 | https://crawfordelectric.com | | |
| 32156 | United States | Creation Builders Inc | 22025 Ventura Blvd #1458Woodland Hills, CA 91364 | +1 800 8020749 | www.creationbuildersinc.com | | |
| 32157 | United States | Creative Energy Inc. | 1280 Loho St. Kailua, Hi 96734 | +1 808 2622137 | solarenergyhawaii.com | | |
| 32158 | United States | Creative Solar USA, Inc. | PO Box 1077, Kennesaw, Georgia 30156 | +1 770 4857438 | www.creativesolarusa.com | | |
| 32159 | United States | Credence LLC | 5880 District Blvd. Suit 24, Bakersfield, CA 93313 | +1 661 4508553 | www.credenceenergy.com | | |
| 32160 | United States | Cresit Energy | 4082 Biddle, Wyandotte, MI 48192 | +1 734 2834595 | www.cresitenergy.com | | |