| 34021 | United States | JHD Electrician | 19 Ledgetree Road, Medfield, MA 02051 | +1 508 2540705 | jdholmanelectric.com | | |
| 34022 | United States | Jordan High Voltage | 4901 SW 51st Street, Davie, FL, 33314 | +1 954 5877754 | jordanhighvoltage.com/ | | |
| 34023 | United States | Jim In Denver | | +1 720 9004626 | www.jimindenver.com | | |
| 34024 | United States | Just Installed Now Electric | San Diego, CA | +1 619 3293565 | justinstallednow.com/ | | |
| 34025 | United States | JIT Solar | 1910 S. Stapley Drive, Suite 221, Meza, AZ, 85204 | +1 480 6037538 | jitsolar.com/ | OutBack Power, Yaskawa - Solectria Solar, SMA Solar Technology AG, Fronius International GmbH, SolarEdge Technologies, Ltd. | |
| 34026 | United States | JJT Total Engineering and Consultants | 3417 N High St., Columbus, OH, 43214 | +1 614 4574764 | jjtengineering.com/ | | |
| 34027 | United States | JK Solar | | +1 530 2385654 | https://jksolar.net | | |
| 34028 | United States | JK Solar | 14176 Amargosa Rd, Victorville, CA 92392 | +1 866 5377058 | jksolar.com/ | Guangdong Fivestar Solar Energy Co., Ltd., Canadian Solar Inc. | SMA Solar Technology AG, Enphase Energy, Inc., SolarEdge Technologies, Ltd. |
| 34029 | United States | JKB Energy | 941 E. Monte Vista Ave.
, Turlock, CA, 95382 | +1 209 6685303 | www.jkbenergy.com | | |
| 34030 | United States | JKL Electric | Victor, MT 59875 | +1 406 2740687 | jklelectric.com | | |
| 34031 | United States | JL Electrical Service, LLC | P.O. Box 21262, Philadelphia, PA 19114 | +1 215 6370616 | www.jlelectricservice.com | | |
| 34032 | United States | JM & R Electric | 19 Vermont St., Holland NY, 14080 | +1 716 5379821 | jmrelectric.com | | |
| 34033 | United States | JM Solar Power LLC | | +1 786 3095850 | https://www.jmsolarpower.com | Fimer S.p.A. | |
| 34034 | United States | JMAC Electric, LLC | 1010 E Pennsylvania Street, Ste 204 Tucson, AZ 85714-1669 | +1 520 2091621 | www.jmacelectric.com | | |
| 34035 | United States | John Mast Construction | 257 Haney Dr Nappanee, IN 46550 | +1 574 7733243 | https://johnmastconstruction.com | | |
| 34036 | United States | JMS Electrical Contracting LLC | 512 Marshall Mill Rd., Franklinville, NJ 08322-2017 | +1 856 4220060 | jmselectrical.org | | |
| 34037 | United States | JN Davis Roofing | 1404C, North Azusa Ave., #479, Covina, CA, 91722 | +1 626 4128071 | https://jndavis.com | | |
| 34038 | United States | JNM Electric, Inc | PO Box 7059, Bonney Lake 98391 | +1 253 4398892 | jnmelectric.com | | |
| 34039 | United States | Joan of Arc Electric | 919 State Route 33, Freehold, NJ 07728 | +1 732 4142610 | www.joanofarcelectric.com | | |
| 34040 | United States | Jobe Roofing Company | 3026 West 48th Street, Los Angeles, CA 90043 | +1 323 2939684 | www.joberoofing.com | | |
| 34041 | United States | Joe Fortuna Electric Co. | PO Box 7420, Santa Rosa, CA 95407 | +1 707 5266599 | www.joefortunaelectric.com | | |
| 34042 | United States | Joe Lewis Mechanical | PO Box 573, Shingle Springs, California 95682 | +1 530 6776472 | www.joelewismechanical.com | | |
| 34043 | United States | Joe Ward Enterprises Inc | 257 East Lucy Street, Florida City, FL 33034 | +1 305 2336316 | https://www.joewardroofing.com | | |
| 34044 | United States | Jofforts Energy Co., Ltd | | | www.jofforts.com | | |
| 34045 | United States | John E. Fullerton Inc. | 1380 Mount Gretna Road, Elizabethtown, PA 17022 | +1 717 3671228 | https://johnefullerton.com | | |
| 34046 | United States | John E. Rozzo & Sons Electrical | 1230, Jefferson Avenue, Washington, PA, 15301 | +1 724 2252992 | www.rozzoelectric.com | | |
| 34047 | United States | John T. Bates, Electrician | 26, Riverside Dr., Florence, Massachusetts, 01062 | +1 413 3741083 | https://www.johntbateselectrician.com | | |
| 34048 | United States | John Wesley Miller Companies | 2310 E. Broadway Tucson, AZ 85719 | +1 520 3253313 | www.johnwesleymillercompanies.com | | |
| 34049 | United States | Johnson Controls, Inc. | 5757 N. Green Bay Avenue, P.O. Box 591, Milwaukee, WI 53201 | +1 866 4961999 | www.johnsoncontrols.com | | |
| 34050 | United States | Johnson Electric Solar | 5560 Faulconer Street San Diego, California 92015 | +1 619 5491421 | www.johnsonelectricsolar.com | | |