| 31951 | United States | Churner Electric | California | +1 562 8031816 | www.churnerelectric.com | | |
| 31952 | United States | Cianbro | 101 Cianbro Square Pittsfield, ME 04967 | +1 207 4873311 | www.cianbro.com | | |
| 31953 | United States | Cielo Construction Company | 2272 Colorado Blvd #1200, Los Angeles, CA 90041 | +1 800 8973114 | www.cieloconstruction.com | | |
| 31954 | United States | Cienaga Solar | P.O. Box 2035, Pismo Beach, CA 93448 | +1 805 4815310 | cienagasolar.com | Sharp Energy Solutions Europe | OutBack Power, Xantrex Technology Inc, SMA Solar Technology AG, Sanyo Denki Co., Ltd. |
| 31955 | United States | Cinci Home Solar | 3450, River Hills Dr, Cincinnati, OH, 45244 | +1 513 6166044 | cincihomesolar.com | | |
| 31956 | United States | Cincinnati Solar Pros | Cincinnati, OH 45209 | +1 513 8731423 | https://www.cincinnatisolarpros.com | | |
| 31957 | United States | Cinnamon Energy Systems | 1550 Dell Avenue, Unit K, Campbell, CA 95008 | +1 408 8837000 | cinnamon.energy | | SolarEdge Technologies, Ltd. |
| 31958 | United States | Cinran Electrical Solutions | Apple Valley, CA 92308 | +1 310 4677643 | cinran.com | | |
| 31959 | United States | CIR Electrical Constrution Corp. | 400 Ingham Ave, Lackawanna, NY 14218 | +1 716 3625000 | www.cirelectric.com | | |
| 31960 | United States | CIRA Energy, Inc. | 1440 South State College, Suite 4B, Anaheim, CA 92806 | +1 800 7668000 | ciraenergy.com | | |
| 31961 | United States | Circa Energy | 1125 West St., Suite 522, Annapolis, MD, 21401 | +1 800 3157754 | circaenergy.com | | |
| 31962 | United States | Circle L Solar | 3914 Sandshell Drive, Fort Worth, TX, 76137 | +1 817 9452011 | www.circlelsolar.com | | |
| 31963 | United States | Circular Energy | 201 Foch Street, Fort Worth, TX 78756 | +1 866 2745578 | www.circularenergy.com | | |
| 31964 | United States | Cirtcele Electric | 1919 N. Rosemont Mesa, AZ 85205 | +1 480 5459600 | https://www.cirtceleelectric.com | | |
| 31965 | United States | Citadel Roofing & Solar | 4980 Allison Parkway, Vacaville, CA 95688 | +1 707 4465500 | www.citadelrs.com | REC Group, Hanwha Q CELLS GmbH, LONGi Solar Technology Co., Ltd., LG Electronics, Inc. | SMA Solar Technology AG, Fronius International GmbH, Enphase Energy, Inc., SolarEdge Technologies, Ltd. |
| 31966 | United States | Citizens Energy Corporation | 88 Black Falcon Avenue, Suite 342, Boston, MA 02210 | +1 617 3386300 | citizensenergy.com | | |
| 31967 | United States | City Electric | 685 S. Arthur Ave. Louisville, CO 80027 | +1 720 9341234 | cityelectriccolorado.weebly.com | | |
| 31968 | United States | City Solar, LLC | 531A, 6th Avenue, Top Floor, Park Slope, New York, 11215 | +1 347 2540019 | citysolar.us | | |
| 31969 | United States | City Solar LLC | 4545 Transit Rd, Ste 506, Williamsville NY 14221 | +1 716 4447283 | www.citysolar.com | | |
| 31970 | United States | CJ Logan Pump and Electric Inc | PO Box 1159, Arroyo Grande, CA 93421 | +1 805 5743946 | www.cjloganpump.com | | |
| 31971 | United States | CJ Roofing Co. | 4020, Brighton Blvd, Denver, CO, 80216 | +1 303 3942802 | www.cjroofing.com | CertainTeed Corporation | |
| 31972 | United States | CJW Electric | | +1 855 5016100 | cjwelectric.com | | |
| 31973 | United States | Ckm Electrical Services, Inc | 216 Elk St., Albany, NY 12210 | +1 518 5887600 | https://ckmesinc.com | | |
| 31974 | United States | Clackamas Electric | PO Box 51, Beavercreek, OR 97004 | +1 503 6322420 | www.clackamaselectric.com | | |
| 31975 | United States | Clark, Inc. | 3109 Lincoln Highway East, Paradise, Pennsylvania 17562 | +1 717 6877676 | www.clarkinc.org | | |
| 31976 | United States | Clark Advanced Technologies Inc. | 6000, Uptown Blvd., Albuquerque, NM, 87110 | +1 408 8403516 | clarkatc.com/ | | |
| 31977 | United States | Clark Construction Group, LLC | 7500 Old Georgetown Road, Bethesda, Maryland 20814 | +1 301 2728100 | https://www.clarkconstruction.com | | |
| 31978 | United States | Clark EcoEnergy | 306 Airport Road, Lancaster, PA 17602 | +1 717 3925590 | www.clarkecoenergy.com | | |
| 31979 | United States | Clark Electrical Contractors, Inc | PO Box 961, Healdsburg, CA 95448 | +1 800 4214809 | www.ccielectrical.com | | |
| 31980 | United States | Clark's Roofing & Construction | 304 N 143rd St E, Suite A, Wichita, KS 67230-7180 | +1 316 8541260 | www.clarksroofingwichita.com | | |