| 31501 | United States | Big Star Builders | 16501 Ventura Blvd., Ste 400, Encino, CA 91436 | +1 888 2766242 | bigstarbuilders.com | | |
| 31502 | United States | Big Sun Community Solar | 110 E. Houston St, San Antonio, TX | +1 210 585 4255 | https://www.bigsunsolar.com | | |
| 31503 | United States | BigSky Solar | PO Box 613, Contoocook, NH 03229 | +1 800 3710838 | www.bigskysolar.com | | |
| 31504 | United States | Billings Electric | 218, Tenth Street, West Billings, MT, 59102 | +1 406 2489394 | www.billingselectricmt.com | | |
| 31505 | United States | Billy Electric, Inc. | 3807 19th Avenue North, Escanaba, MI 49829 | +1 906 7895556 | www.billyelectric.com | | |
| 31506 | United States | Bilt-Well Roofing | 3310 Verdugo Rd, Los Angeles, CA 90065 | +1 323 2542888 | biltwellroofing.com | | |
| 31507 | United States | Biomass North East | | +1 1434 682537 | https://www.biomassnortheast.com | | |
| 31508 | United States | BioStar Solar | 9400 Reeds Rd #150, Overland Park, KS 66207 | +1 913 3694101 | biostarsolar.com | | |
| 31509 | United States | Birch Marine | 71 Commercial St., Suite #203, Boston, MA 02109 | +1 617 7234900 | www.birchmarine.com | | |
| 31510 | United States | Birkel Electric | 652 Trade Center Blvd. Chesterfield, MO 63005 | +1 636 3867000 | birkelelectric.com | | |
| 31511 | United States | Bishop Heating & Air Conditioning | 463 N. Warren Street Bishop, CA 93514 | +1 760 7849034 | www.bishopheatingandac.com | | |
| 31512 | United States | Bishop Solar, LLC. | | +1 602 6908804 | https://www.bishopsolar.com | SunPower Corp. | |
| 31513 | United States | Bison Roofing and Solar, LLC | 4750 N Dixie Hwy Suite 8-9, Oakland Park, FL 33334 | +1 954 5415197 | www.bisonroofing.com | | |
| 31514 | United States | Bithenergy | 113 West Monument Street, Baltimore, Maryland 21201 | +1 410 9621188 | www.bithenergy.com | | |
| 31515 | United States | Bixby Electric, Inc. | 521 Wheeler SE, Albuquerque, NM 87102 | +1 505 8425384 | www.bixbyelectric.com | | |
| 31516 | United States | BJ Electrical Service LLC | | +1 941 7617601 | www.bjsparky.com | | |
| 31517 | United States | Black & Veatch | 11401, Lamar Avenue, Overland Park, KS, 66211 | +1 913 4582000 | www.bv.com | | |
| 31518 | United States | Black Creek Electrical Services, Inc. | 4230 CR 218 Suite 8, Middleburg Florida 32068 | +1 904 2917941 | blackcreekelectric.com | | |
| 31519 | United States | Black Hills Solar, Inc | 1950, Samco Rd, Suite 7, Rapid City, SD, 57702 | +1 605 3408627 | www.blackhillssolar.com | OutBack Power, SolarEdge Technologies, Ltd. | |
| 31520 | United States | Black River Electrical Mechanical | 29642 County Rd., 50 Black River, NY 13612 | +1 315 7887669 | www.nnysolar.com | | |
| 31521 | United States | Black Rock Solar | | +1 775 7627381 | www.blackrocksolar.org | | |
| 31522 | United States | Blackwater Electric Company, Inc. | 400 Network Station, Chesapeake, VA 23320 | +1 757 5499422 | blackwaterelectric.com | | |
| 31523 | United States | Blackwell Heating and Air | 9 S. Sacramento St., Lodi CA 95240 | +1 209 3690991 | https://www.lodiheatandair.com | | |
| 31524 | United States | Blake Electric | 50 West 100 North Richfield, UT 84701 | +1 435 8965468 | blakelectric.com | | |
| 31525 | United States | Blake Electric, Inc. | 100 3rd Ave SW, Waukon, IA 52172 | +1 563 5683686 | www.blakeelectricinc.com | | |
| 31526 | United States | Blalock Electric & Solar Inc | 31885 Corydon St. Lake Elsinore, CA. 92530 | +1 951 4400583 | www.blalock-electric.com | | |
| 31527 | United States | Bland Company | 4303 E. Brundage Lane, Bakersfield, CA, 93307 | +1 661 8363880 | https://www.blandcompany.com | Enphase Energy, Inc., SolarEdge Technologies, Ltd. | |
| 31528 | United States | Blane Robbins Electric, Inc. | 431 W. 100 N., Blackfoot, ID 83221 | +1 208 7854674 | blanerobbinselectric.com | | |
| 31529 | United States | Blattner Energy Inc. | 392 County Road 50, Avon, MN 56310 | +1 320 3567351 | blattnerenergy.com | | |
| 31530 | United States | Blay Electric LLC | 20 Becky Ln, Concord, NH 03301 | +1 603 3405526 | https://www.blayelectric.com | | |