| 31981 | United States | Clarke & Rush Mechanical, Inc. | 4411 Auburn Blvd, Sacramento, CA 95841 | +1 916 6092667 | www.clarke-rush.com | | |
| 31982 | United States | Clarusys Inc. | 2375 E Camelback Road, Phoenix, AZ 85016 | +1 602 4490102 | www.clarusys.com | Enphase Energy, Inc. | |
| 31983 | United States | Classic Construction Services, Inc. | 2 Hickory Road, Summit, NJ 07901 | +1 908 2735252 | https://www.classicconstructionservice.com | | |
| 31984 | United States | Classic RV Repair & Restorations, LLC | 73 Route 9, Fishkill NY 12524 | +1 914 5238310 | www.classicrvrepairrestorations.com | | |
| 31985 | United States | Clayco Electric Inc. | 2710 Alpine Blvd Suite K-440, Alpine, CA 91901 | +1 619 9712799 | claycoelectric.org | | |
| 31986 | United States | Claypool Electric, Inc. | 1275 Lancaster-Kirkersville Rd. Lancaster, OH 43130 | +1 740 6535683 | www.claypoolelectric.com | | |
| 31987 | United States | Clean Energy Design, LLC | PO Box 686, Osterville, MA 02655 | +1 508 5636990 | cleanenergydesign.com | OutBack Power, Yaskawa - Solectria Solar, SMA Solar Technology AG, Fronius International GmbH, Enphase Energy, Inc., Fimer S.p.A. | |
| 31988 | United States | Clean Energy Solutions, Inc. | 1055 West 7th Street, 33rd Floor, Los Angeles, CA 90017 | +1 800 9941134 | https://www.cleanenergysolar.org | | |
| 31989 | United States | Clean Fuel Connection, Inc. | 11800 Clark Street Arcadia, CA 91006 | +1 626 4451450 | www.cleanfuelconnection.com | SunPower Corp., Kyocera Corporation, Panasonic Corporation (Sanyo) | |
| 31990 | United States | Clean Line Energy | 1001 McKinney Street, Suite 700, Houston, TX 77002 | +1 832 3196310 | www.cleanlineenergy.com | | |
| 31991 | United States | Clean Point Energy | 124 Washington Ave, Suite G, Point Richmond, CA 94801 | +1 530 4000851 | https://www.cleanpointenergy.info | | |
| 31992 | United States | Clean Rays Energy | 4135 Eagle Rock Blvd., Ste 101, Los Angeles, CA 90065 | +1 323 6844473 | www.cleanraysenergy.com | | |
| 31993 | United States | Clean Solar, Inc. | 1445 Koll Circle, Suite 109, San Jose, CA 95112 | +1 888 5517652 | www.cleansolar.com | SMA Solar Technology AG, Enphase Energy, Inc. | |
| 31994 | United States | CleanFocus Energy | 500 Sansome St, Suite 510, San Francisco, CA 94111 | +1 415 7295575 | www.cleanfactorenergy.com | | |
| 31995 | United States | CleanTek LLC | | +1 510 9819886 | https://uscleantek.com | | |
| 31996 | United States | Clear Efficiency | 915, Highland Pointe Drive, #250, Roseville, California, 95678 | +1 916 4382532 | clearefficiencyhome.com/ | | |
| 31997 | United States | Clear Energy Solutions | 1320 Delaware Ave, Wilmington, DE. 19806 Suite 1E | +1 302 7503217 | clearenergysolutions.org | | |
| 31998 | United States | Clear Solar Solutions, Inc. | 2200 Maryann Drive, Turlock, CA 95380 | +1 209 8509290 | https://www.clearsolarsolutions.com | | |
| 31999 | United States | ClearSpot Energy | 7 Stag Ln., Monterey, CA 93940-6305 | +1 650 4007964 | https://www.clearspotenergy.com | | |
| 32000 | United States | ClearSun Power | 1400, Quail St., #100, Newport Beach, CA, 92660 | +1 949 5365120 | https://clearsunpower.com | | |
| 32001 | United States | Clearway Energy Group LLC | 100 California Street, Suite 400, San Francisco, CA 94111 | +1 415 6271600 | https://www.clearwayenergygroup.com | | |
| 32002 | United States | Clēnera, LLC | 800 W Main St, Suite 900, Boise, Idaho 83702 | +1 208 6393232 | clenera.com | | |
| 32003 | United States | Cleveland Roofing Corp | 2498 E Superior Ave, Suite 200, Cleveland, OH 44114 | +1 216 7989030 | clevelandroofingcorp.com | | |
| 32004 | United States | Clever Energy | 20, North Orange Avenue, Unit 1100, Orlando, FL, 32801 | +1 407 2741531 | https://www.gocleverenergy.com | REC Group, Hanwha Q CELLS GmbH, LG Electronics, Inc., Silfab Solar Inc. | SMA Solar Technology AG, Enphase Energy, Inc., SolarEdge Technologies, Ltd. |
| 32005 | United States | Cliff's Welding Shop | 4007 E. Main Street, Mesa, Arizona 85205 | +1 480 8320570 | https://cliffswelding.com | | |
| 32006 | United States | Climate & Energy Solutions | 85 Esat Ave., Chico, CA 95926 | +1 530 8916787 | www.caeschico.com | | |
| 32007 | United States | Climate Control Inc | 4763 S Carolina 153, Easley, SC 29642 | +1 864 2695576 | www.climatecontrolsc.com | | |
| 32008 | United States | Climate Control Systems, Inc | 1942 Highland Ave., NE, Hickory, NC 28601 | +1 828 3581239 | climatecontrolhickory.com | | |
| 32009 | United States | Climate Pro | 1585, Mallory Lane, Suite 202, Brentwood, TN, 37027 | +1 615 2546283 | https://climateprotn.com | | |
| 32010 | United States | Climate Solar Solutions | Venice, California, LA | +1 424 3539997 | https://climatesolarnow.com | | |