| 28891 | United Kingdom | Faraday Electrics Ltd | Nottingham | +44 115 9894024 | www.faradayelectrics.co.uk | | |
| 28892 | United Kingdom | Farm Renewables | Hillcrest House, Bury Road, Lavenham, Suffolk CO10 9QG | +44 1787 248098 | www.farmrenewables.co.uk | | |
| 28893 | United Kingdom | AP Faulkner (Heating) Ltd | Unit K Bridge Farm, Reading Road, Arborfield, Reading RG2 9HT | +44 118 9884343 | www.faulkner-heating.co.uk | | |
| 28894 | United Kingdom | Fawcett Electrical Ltd | Unit D3, Crofthead Business Park, Skelmanthorpe, Huddersfield, West Yorkshire, HD8 9EB | +44 1484 863769 | www.fawcettelectrical.co.uk | | |
| 28895 | United Kingdom | First Choice Services UK Ltd. | Anvil Cottage, Forge Lane, Boxley, Maidstone, Kent, ME14 3DS | +44 1622 661551 | www.firstchoiceservicesltd.co.uk | | |
| 28896 | United Kingdom | FDG Group | Goeland House, 178 St Albans Rd., Arnold Nottingham NG5 6GW | +44 115 8456556 | https://nottinghamenergycentre.co.uk | | |
| 28897 | United Kingdom | Feed It Green Ltd. | Hanover House, Hanover Street, Liverpool, Merseyside, L1 3DZ | +44 800 0147788 | feeditgreen.com | | |
| 28898 | United Kingdom | Feed-In Tariffs | | +44 800 0588039 | www.fitariffs.co.uk | | |
| 28899 | United Kingdom | Feeney Electrical Ltd | Unit 7D Benbow Estate, 15 Killylane Road, Eglinton, Co. Derry. BT47 3DW | +44 2871 811085 | https://feeneyelectrical.com | | |
| 28900 | United Kingdom | Ferguson Energy | 8 John Anderson House, Shore Street, Oban, Argyll, PA34 4NT | +44 1631 566127 | www.ferguson-energy-oban.co.uk | | |
| 28901 | United Kingdom | Fern Electrical Services | | +44 1524 858321 | www.fernelectricalservices.co.uk | | |
| 28902 | United Kingdom | Fervo Renewable Energy | 16 Wakes Meadow, Bunbury, Tarporley, Cheshire, CW6 9SH | +44 333 2402121 | www.fervo.co.uk | SolarEdge Technologies, Ltd. | |
| 28903 | United Kingdom | FES Group | Forth House, Pirnhall Business Park, Stirling, FK7 8HW | +44 1786 819600 | www.fes-group.co.uk | | |
| 28904 | United Kingdom | FG Trew and Son Ltd | 49 / 50 King Edward Road, Swansea, SA1 4LN | +44 1792 462614 | www.fgtrew.co.uk | | |
| 28905 | United Kingdom | Free Green Energy Corporation Ltd. | Oakways, Tubbs Lane, Highclere, Newbury, Berkshire, RG20 9PQ | +44 844 4815855 | www.freegreenenergy.co | | |
| 28906 | United Kingdom | FineLine Solar | Newnham Court Shopping Village, Bearsted Road, Maidstone, Kent, ME14 5LH | +44 808 1634522 | www.fineline-windows.co.uk | | |
| 28907 | United Kingdom | Firehawk Ltd | Unit 6-14 Peel Street, Failsworth, Manchester, M35 0UF | +44 161 6835424 | firehawk.ltd.uk | | |
| 28908 | United Kingdom | Fires and Heating | Unit 89, Norwell Drive, Perth Airport, Scone Perth PH2 6PL | +44 1738 553330 | firesandheatingltd.co.uk | | |
| 28909 | United Kingdom | First Call PV Services | Y Felin, Llanddewi Brefi, Tregaron, Ceredigion SY25 6RP | +44 7779 597112 | https://www.firstcallsvs.com | | |
| 28910 | United Kingdom | First Class Electrics | 26 Bourne Road, Godalming, Surrey, GU7 3NH | +44 1483 429989 | www.firstclasselectrics.co.uk | SMA Solar Technology AG | |
| 28911 | United Kingdom | First Phase Electrical Contractors | 12 Elliot St, Elliots Town, New Tredegar, NP24 6DP | +44 1443 820668 | | | |
| 28912 | United Kingdom | First Solar PV Ltd | 17 Eton Grove, London SE13 5BY | +44 20 83332729 | https://firstsolarpv.co.uk | | |
| 28913 | United Kingdom | First-Fix Electrical and Solar | 81 Dalelands Estate, Market Drayton TF9 1BD | +44 7817 994078 | https://www.first-fixelectrical.co.uk | | |
| 28914 | United Kingdom | First4Solar | 9 Park Square East, Leeds, West Yorkshire, LS1 2LH | +44 8450 036882 | first4solar.co.uk | SolarWorld Industries GmbH, JA Solar Holdings Co., Ltd., Panasonic Corporation (Sanyo), LG Electronics, Inc. | Enphase Energy, Inc. |
| 28915 | United Kingdom | FK Construction Ltd. | Keenan House, 22-26 Stockport Road, Altrincham, WA15 8EX | +44 161 9261350 | www.fkgroup.co.uk | | |
| 28916 | United Kingdom | FKB Electrical Ltd | Unit 10, Quakers Coppice, Crewe Gates, Cheshire, CW1 6EW | +44 1270 501244 | https://www.fkb.co.uk | | |
| 28917 | United Kingdom | Flat Roofing Specialists UK | 53 High Street, Blyton, Gainsborough, United Kingdom, DN21 3JX | +44 800 6446612 | www.flatroofinguk.co.uk | | |
| 28918 | United Kingdom | F & G Plumbing & Heating Engineers Ltd | 58 Largo Road, St Andrews, KY16 8NJ | +44 1334 461017 | www.flemingandgibson.co.uk | | |
| 28919 | United Kingdom | Flex Eco Services Ltd. | 29 Grove Hill, Colyton, Devon EX24 6ET | +44 1297 551321 | flexecoservices.co.uk | | |
| 28920 | United Kingdom | Flexisolar Ltd | Unit 3, Manor Farm, Low Road, Fenstanton, Huntingdon, Cambridge PE28 9HU | +44 1480 277866 | https://www.flexi-solar.com | | |