| 38011 | United States | Wing Solar & Wood Energy Inc. | 22040 Manor Lane, Red Bluff, CA 96080 | +1 530 5270557 | wingsolar.net | | SolarWorld Industries GmbH, Canadian Solar Inc. |
| 38012 | United States | WinSol Power Company | 2031 Johns Drive, Glenview, IL 60025 | +1 847 9614440 | www.winsolpc.com | | |
| 38013 | United States | Winters Electric, Inc. | 139 Winters Dr. Colorado Springs, Colorado 80907 | +1 719 4770535 | https://www.winterselectric.com | | |
| 38014 | United States | Wire Works Solar | 304 E. Main St., Fruitland, MD 28126 | +1 410 5461810 | wireworkssolar.com | | |
| 38015 | United States | Wire-Tech Electric Inc. | Richland WA 99352 | +1 509 9472447 | https://wire-techelectric.com | | |
| 38016 | United States | Wired Into The Future Inc. | 3330, Vincent Rd., Suite C, Pleasant Hill, CA, 94523 | +1 925 8723408 | www.wiredintothefuture.com | | |
| 38017 | United States | Wired Right Electrical LLC | PO Box 2205, Fairview, NC 28730 | +1 828 2225032 | https://wiredrightelec.com | | |
| 38018 | United States | WireMasters Electric | 8862 SW 129 terr., Miami, FL 33176 | +1 305 2394119 | wiremasterselectric.com | | |
| 38019 | United States | WISE Construction & Solar | 500 Reserve St., Southlake, TX 76092 | +1 817 3805001 | www.wiseconstructionsolar.com | | |
| 38020 | United States | Wise Power Systems, Inc. | 500 Philadelphia Pike, Wilmington DE 19809 | +1 877 2809473 | wisepowersystems.com | OutBack Power, Xantrex Technology Inc, SMA Solar Technology AG, Fronius International GmbH | |
| 38021 | United States | Wise Solar Inc | 4401 N Atlantic Ave. #200, Long Beach, CA 90807 | +1 888 4067879 | https://www.wisesolar.com | REC Group, SunPower Corp., Panasonic Corporation (Sanyo), LG Electronics, Inc. | Enphase Energy, Inc., SolarEdge Technologies, Ltd. |
| 38022 | United States | WiseCo Electric & Solar | 1750 Prairie City Road, Suite 130 PMB 175, Folsom, CA 95630 | +1 916 7524303 | www.wisecoelectric.com | | |
| 38023 | United States | WM J Kraus & Son Inc. | 1012 Main St. Keokuk, IA 52632 | +1 319 2292318 | https://www.krausandsons.com | | |
| 38024 | United States | Wohlsen Construction | 548 Steel Way, PO Box 7066, Lancaster, PA 17604-7066 | +1 717 2992500 | www.wohlsenconstruction.com | | |
| 38025 | United States | Wolf River Electric | 101 Isanti Parkway NE, Isanti, MN 55040 | +1 763 2296662 | wolfriverelectric.com | | |
| 38026 | United States | Wolf Solar Electric, LLC | P.O. Box 612, Tok, AK, 99780 | +1 907 2555580 | www.wolfsolarelectric.com | | Trina Solar Limited, Sharp Energy Solutions Europe |
| 38027 | United States | Wolf Track Energy | 6323 Pioneer Junction Rd., Duluth, MN 55804 | +1 218 3025601 | https://wolftrackenergy.com | Panasonic Corporation (Sanyo) | |
| 38028 | United States | Wolfe & Sons Heating and Cooling, Inc. | 989 Old W Henderson Rd, Columbus, OH 43220 | +1 614 4510846 | https://www.wolfeandsons.com | | |
| 38029 | United States | Wolff Mechanical Inc. | 1701 S. Indian Bend, Suite 101, Tempe, AZ 85281 | +1 602 8140004 | https://azairconditioning.com | | |
| 38030 | United States | Wong Greentech | 241 Fulton St., Palp Alto, CA 94301 | +1 650 3537752 | www.wonggreentech.com | SMA Solar Technology AG, Enphase Energy, Inc. | |
| 38031 | United States | Woodall Construction Services, LLC | Burleson, Texas 76028 | +1 817 9462733 | woodallconstructionservices.com | | |
| 38032 | United States | Woodlands Solar Installation | The Woodlands, Texas | +1 281 5244223 | https://www.woodlandssolarinstallation.com | | |
| 38033 | United States | Wooten's Electric, Inc. | 305 Stone Chimney Rd SW, Supply, NC 28462 | +1 910 7546832 | www.wootenselectric.com | | |
| 38034 | United States | World Class Services | 7385 North State Route 3, Suite 126, Westerville, Ohio 43082 | +1 614 7398670 | https://www.getworldclassservice.com | | |
| 38035 | United States | World Solar Solution LLC | New Jersey, 4, Crossroads Drive, Suite 116, Hamilton, NJ, 08691 | +1 888 2703861 | worldsolarsolution.com | | |
| 38036 | United States | WorldStar solar | 5023 N Pkwy Calabasas, Calabasas, CA, 91302 | +1 800 5714211 | worldstarsolar.com | Panasonic Corporation (Sanyo), LG Electronics, Inc. | Enphase Energy, Inc., SolarEdge Technologies, Ltd. |
| 38037 | United States | Worldwide Energy, Inc. | P.O. Box 14982 Lenexa, KS 66285 | +1 913 3100705 | www.worldwideenergy.com | | |
| 38038 | United States | Wray Electric | 801 N Prospect Street Suite 1, Ellensburg, WA 98926 | +1 509 9684746 | www.wrayindustries.com | | |
| 38039 | United States | WRB Energy | 1414 Swann Avenue, Suite 201, Tampa, FL 33606 | +1 813 2513737 | wrbenergy.com | | |
| 38040 | United States | Winona Renewable Energy, LLC | 1449 Ridgewood Dr., Winona, MN 55987 | +1 507 3120190 | www.Winonarenewablernergy.com | | |