| 30511 | United Kingdom | Worcester Renewable Energy Ltd | Bond House, Link Business Centre, Howsell Road, Malvern, Worcestershire, WR14 1UQ | +44 1684 892121 | www.worcester-renewable.co.uk | | |
| 30512 | United Kingdom | Worcester Renewables Ltd | Harbour, Atch Lench Road, Church Lench, Evesham, WR11 4UG | +44 1386 871490 | worcesterrenewables.com | | |
| 30513 | United Kingdom | Work Work Ltd | Comer Business & Innovations Centres, North London Business Park, 3 Oakleigh Road South, London, N11 1GN | +44 20 89027290 | workworkltd.com | LG Electronics, Inc. | |
| 30514 | United Kingdom | WRB Group Ltd | Unit 8 Somerton Ind Est, Dargan Cresent, Belfast BT3 9JB | +44 28 90370650 | https://wrbni.uk | | |
| 30515 | United Kingdom | WS Parsons Ltd | Station Road, Tenterden, Kent, TN30 6HE | +44 1580 762627 | www.wsparsons.co.uk | | |
| 30516 | United Kingdom | West Yorkshire Gas Solutions Ltd | Unit 1, Brookwoods Industrial Estate, Burrwood Way, Holywell Green, Halifax, West Yorkshire, HX4 9BH | +44 1422 750125 | www.wygs.co.uk | | |
| 30517 | United Kingdom | Wyvis Roofing | Unit 13a, Dalcross Industrial Estate, Inverness IV2 7XB | +44 1463 718653 | www.wyvisroofing.co.uk | | |
| 30518 | United Kingdom | Xerogrid Solar | 219 Stainbeck Lane, Leeds, LS7 2PS | +44 7973 829955 | https://www.xerogrid.com | OutBack Power, Victron Energy BV | OutBack Power, Simpliphi Power, Inc. |
| 30519 | United Kingdom | XKY Energy Ltd. | 4 Howden Hall Gardens, Edinburgh EH16 6UN | +44 7921 147034 | https://www.xkyenergy.co.uk | | |
| 30520 | United Kingdom | XL Electrical Excellence | 5 The Mews, 6 Putney Common, Putney, London, SW15 1HL | +44 800 4332477 | www.xlelectricals.co.uk | | |
| 30521 | United Kingdom | Xpert Energy Installations Ltd. | 2 Hercules House, Calleva Park, Aldermaston, Reading, Berkshire RG7 8DN | +44 118 9303600 | www.xpertenergy.co.uk | | |
| 30522 | United Kingdom | Y Solar Ltd. | Unit 60, Enterprise Centre, Cranborne Road, Potters Bar, EN6 3DQ | +44 844 2720036 | www.ysolar.co.uk | SMA Solar Technology AG, Enphase Energy, Inc., Fimer S.p.A. | |
| 30523 | United Kingdom | Yorkshire Electrical Solar Ltd | 38 Rotherham Road, Parkgate Rotherham, Yorkshire, S62 6EA | +44 1709 718980 | https://yecgroup.co.uk | | |
| 30524 | United Kingdom | YES Energy Solutions | Unit 1, Brookwoods Industrial Estate, Burrwood Way, Holywell Green, Halifax, West Yorkshire, HX4 9BH | +44 1422 880100 | www.yesenergysolutions.co.uk | | |
| 30525 | United Kingdom | Yingli Namene Solar Ltd. | 51 Holland Street, London W8 7JB | | https://www.yinglinamene.com | | |
| 30526 | United Kingdom | Yorkshire Energy Systems | Windsor House, Cornwall Road, Harrogate, HG1 2PW | +44 1423 529144 | www.yorkshireenergysystems.co.uk | | |
| 30527 | United Kingdom | Your Eco | The Old Church School, Frome, Somerset, BA11 1HR | +44 1373 485023 | https://yourecouk.com | | |
| 30528 | United Kingdom | ZA Electrical | 19 Oak Hall Park, Burgess Hill West Sussex RH15 0DH | +44 74600 37733 | zaelectrical.com | JA Solar Holdings Co., Ltd. | SMA Solar Technology AG, SolaX Power Network Technology(Zhejiang) Co.,Ltd. |
| 30529 | United Kingdom | Zanussi Solar | Unit 1 Lakes Court, Lancaster Business Park, Newborough Road, Needwood, DE13 9PD | +44 330 3335177 | www.zanussisolar.co.uk | | |
| 30530 | United Kingdom | ZC Energy Ltd. | 1 Castle Row, London W4 4JQ | +44 7872 959498 | zc-energy.com | | |
| 30531 | United Kingdom | Zero Carbon Solution | Stackley House, Stretton Road, Great Glen, Leicester LE8 9GP | +44 1162 593591 | zerocarbonsolution.co.uk | | |
| 30532 | United Kingdom | Zestec | 9 Nimrod Way, Ferndown, Dorset BH21 7UH | +44 1202 862760 | https://zestecgroup.co.uk | AU Optronics Corporation | Sungrow Power Supply Co., Ltd. |
| 30533 | United Kingdom | ZimSolar, Hanwa Technology Ltd | Radlett, Hertfodshire WD7 9DJ | +44 1923 854572 | www.zimsolar.co.uk | | |
| 30534 | United Kingdom | Zing Energy Ltd. | JR Quarter, Moy Road Industrial Estate, Taffs Well, Cardiff, CF15 7QR | +44 330 8084365 | https://wearezing.com | | |
| 30535 | United Kingdom | Zion Energy Limited | 26 Tan Y Waun, Penrhos, Ystradgynlais, Swansea, SA9 1QY | +44 330 0438081 | www.zionenergy.co.uk | | |
| 30536 | United Kingdom | ZLC Energy Ltd | Glebe House, Beach Road, Carlyon Bay, St. Austell, Cornwall, PL25 3PG | +44 1726 390390 | www.zlcenergy.co.uk | | BYD Company Limited, LG Electronics, Inc. |
| 30537 | United States | "Joe" Dickey Electric | 180 W. South Range Rd, PO Box 158, North Lima, OH 44452 | +1 330 5493976 | dickeyelectric.com | | |
| 30538 | United States | 1 Solar Solution, LLC | 6170 Research Rd, Inside UNT Bldg, Frisco, TX 75033 | +1 855 6017652 | 1solarsolution.com | ReneSola Ltd. | SMA Solar Technology AG, Fronius International GmbH, SolarEdge Technologies, Ltd. |
| 30539 | United States | 1 Source Solar, LLC | 3020 SW Oralabor Rd #116, Ankeny, IA 50023 | +1 515 2891974 | 1sourcesolar.com | | |
| 30540 | United States | 1 Star Energy | PO Box 40, Colleyville, TX 76034 | +1 239 8965725 | www.1starenergy.com | | |