| 28531 | United Kingdom | Coretech Solar | Unit 3, Brockholes Industrial Park, Brockholes, Holmfirth, West Yorkshire, HD9 7BN | +44 1484 661313 | coretechsolar.co.uk/ | | |
| 28532 | United Kingdom | Cornerstone Renewables Ltd. | Units 2-4, Fuller Road, Harleston, Norfolk IP20 9EA | +44 1379 853613 | www.cornerstonelimited.co.uk | | |
| 28533 | United Kingdom | Cornish Roofing Company Ltd | Pennyhayle, St. Kew Highway, Wadebridge, Cornwall, PL30 3ED | +44 1208 816991 | https://www.cornishroofing.co.uk | | |
| 28534 | United Kingdom | Cosmos Energy | Liberty House, The Enterprise Centre, Greenham Business Park, Newbury, Berkshire RG19 6HS | +44 1488 668090 | www.cosmosenergy.co.uk | | |
| 28535 | United Kingdom | Cotswold Renewables | 39 Park Farm, Bourton-on-the-Water, Cheltenham, Gloucestershire, GL54 2HF | +44 1451 810710 | cotswoldrenewables.com | | |
| 28536 | United Kingdom | Coulston Electrical Installations | 77 Brownlow Drive Rise Park Nottingham, Nottinghamshire NG5 5AA | +44 115 9551417 | www.solarpanelinstallationnottingham.co.uk | | |
| 28537 | United Kingdom | Countrywide Solar Ltd. | 3 Baughton Hall Cottages, Earls Croome, Worcestershire, WR8 9DQ | +44 776 6745400 | www.countrywidesolar.co.uk | | |
| 28538 | United Kingdom | Cowley Electrical Ltd. | 33 Maidenhair Drive, Rugby, CV23 0SE | +44 7799 113661 | cowley-electrical.co.uk | | Aleo Solar GmbH, SunPower Corp., JA Solar Holdings Co., Ltd., Trina Solar Limited, Canadian Solar Inc., Panasonic Corporation (Sanyo), Perlight Solar Co., Ltd., Jinko Solar Holding Co., Ltd., LG Electronics, Inc. |
| 28539 | United Kingdom | Cowley Electrical Contractors Ltd. | Callow Hill, Brinkworth, Chippenham SN15 5DZ | +44 1666 510976 | cowley-electrical.com | | |
| 28540 | United Kingdom | CDW Services (UK) Ltd | 20-22 Wenlock Road, London, N1 7GU, England | +44 1202 718297 | www.cpflatroofing.co.uk | | |
| 28541 | United Kingdom | Complete Plumbing Clean Energy Ltd | 16-18 Paxton Place, London, Greater London, SE27 9SS | +44 2086 709538 | www.cpce.co | | |
| 28542 | United Kingdom | CPSL Group Ltd | Goodyear Business Park, New Street, Mawdesley, Ormskirk, Lancashire, L40 2QP | +44 1704 841848 | https://www.cpsl-group.com | | |
| 28543 | United Kingdom | Craig Michael Electrical | 9 Cloisters Way, St Georges, Telford, TF2 9PY | +44 1952 606799 | https://www.craigmichaelelectrical.co.uk | | |
| 28544 | United Kingdom | Craven Energies Ltd | The Barn, Lane Head Farm, Carleton, Skipton, N. Yorkshire BD23 3HT | +44 1756 831050 | www.cravenenergies.co.uk | | |
| 28545 | United Kingdom | CRC Electrical and Building Services | King's Lynn, Norfolk PE33 0NH | +44 7584 494420 | https://crcservice.co.uk | | |
| 28546 | United Kingdom | Croft Roofing Limited | Lower Turner Lane Farm, Lower Turner Lane, Addingham, Ilkley, LS29 0LG | +44 1943 839032 | www.croftroofing.co.uk | | |
| 28547 | United Kingdom | Croft Solar | 25 Sawston Close, Shrewsbury, SY3 6AY | +44 1743 358048 | www.croftelectrical.com | | |
| 28548 | United Kingdom | Cross Group | 58 Hamiltonsbawn Road Industrial Estate, Armagh, BT60 1HW, Northern Ireland | +44 28 37526090 | www.cross-group.org | | |
| 28549 | United Kingdom | Cruden Energy Solutions | Hillcrest, Knutsford Road, Grappenhall, Warrington, Cheshire, WA4 3LA | +44 1925 267314 | www.crudengroup.co.uk | | |
| 28550 | United Kingdom | CS Electrical Contracting (UK) Ltd. | 6 Leamington Grove, Swindon, Wiltshire SN3 1NU | +44 1793 847191 | cs-elec.co.uk | | |
| 28551 | United Kingdom | CS Electrical | 11 Meadowside, Newquay, TR7 2LJ | +44 1637 879745 | https://www.electriciannewquay.co.uk | | |
| 28552 | United Kingdom | CS Electrical Installations Ltd. | 30 Wincrofts Dr, London SE9 2RG | +44 20 88509704 | www.cselectrical.com | | |
| 28553 | United Kingdom | CSM Installations Ltd | Ceme Innovation Centre, Marsh Way, Rainham, Essex, RM13 8EU | +44 208 5965163 | https://www.csminstallations.com | | |
| 28554 | United Kingdom | CSolar ltd | 5 Windmill Road, Exhall Coventry, CV79GP | +44 7428 249261 | www.csolar.biz | | |
| 28555 | United Kingdom | CTA Electrical & Solar Services | 19 Score View, Ilfracombe EX34 8EZ | +44 7796 271548 | https://www.ctasolar.com | | |
| 28556 | United Kingdom | Cuberoot Energy Ltd | 82 Broad Street, Syston, Leicester, LE7 1GH | +44 116 2603545 | www.cuberoot-energy.co.uk | | |
| 28557 | United Kingdom | Cumbria Roofing | 2, Chapel St, Egremont, CA22 2DU | +44 1946 841848 | cumbriaroofing.co.uk/ | | |
| 28558 | United Kingdom | Current Energy Solutions Ltd | 4, Capricorn House, 28 Beer Road, Seaton, EX12 2PD | +44 1297 761671 | www.currentenergysolutions.co.uk | | Kyocera Corporation |
| 28559 | United Kingdom | Current Generation | | +44 1256 331572 | www.currentgeneration.co.uk | | Hanwha Q CELLS GmbH, Romag Ltd, Azur Space Solar Power Gmbh, Kyocera Corporation, Mitsubishi Electric Corporation, Sharp Energy Solutions Europe, Panasonic Corporation (Sanyo), Phono Solar Technology Co., Ltd., AU Optronics Corporation |
| 28560 | United Kingdom | Current Technologies Limited | 11 Axis Court, Mallard Way, Swansea SA7 0AJ | +44 7773 770882 | www.current-tech.co.uk | | |