| 30001 | United Kingdom | RW Bell Building Services Ltd. | Unit 4, 34 Atholl Road, Pitlochry, PH16 5BX | +44 1796 472263 | www.rwbell.com | | |
| 30002 | United Kingdom | Ryan Askew Electrical Services Ltd | 27-29 Scholes Lane, Rotherham, S61 2RG | +44 1144 183362 | www.rotherhamelectrician.net | | |
| 30003 | United Kingdom | Ryse Energy UK Ltd (Sustainable Energy Systems Ltd.) | Disley Close, Blackpool, FY4 5FN | +44 800 4488028 | https://www.ryse.energy | SMA Solar Technology AG | |
| 30004 | United Kingdom | S & D Electrical Services | The Studio, 38 Coney Six, East Wittering, West Sussex, PO20 8DL | +44 1243 671255 | sdconstructionltd.co.uk | Yingli Green Energy Holding Co., Ltd., Canadian Solar Inc., Panasonic Corporation (Sanyo), Hyundai Energy Solutions | |
| 30005 | United Kingdom | S & T Camper Conversions | Unit 33, Britannia Mill, Stoneholme Industrial Estate, Crawshawbooth, BB4 8AX | +44 1706 563835 | https://www.sandtcampers.co.uk | | |
| 30006 | United Kingdom | S Notaro Windows Ltd | Huntworth, Bridgwater TA7 0AJ | +44 1278 662298 | https://www.notarowindows.com | | |
| 30007 | United Kingdom | S-Power Energies | The Pixmore Centre, Pixmore Avenue, Letchworth, SG6 1JG | +44 1462 708610 | www.s-power.co.uk | SMA Solar Technology AG, Fronius International GmbH, SolarEdge Technologies, Ltd. | |
| 30008 | United Kingdom | S&D Electrical Services Ltd. | The Studio, 38, Coney Six, East Wittering, West Sussex, PO20 8DL | +44 1243 671255 | www.sdelectricalservicesltd.co.uk | Shenzhen Growatt New Energy Technology Co., Ltd., Ginlong Technologies Co., Ltd | |
| 30009 | United Kingdom | S&P Roofing | Unit 5, Premier Business Park, Westfields Trading Estate Faraday Road, Hereford, HR4 9NZ | +44 1432 842550 | www.sp-roofing.co.uk | | |
| 30010 | United Kingdom | S&S Electrics | 6 Castle Cl, Stockton-on-Tees TS19 0SL | +44 770 3337011 | sands-electrics.co.uk | | |
| 30011 | United Kingdom | Safe & Protect Ltd. | 10 Bridge Place, Galashiels, TD1 1SN | +44 1896 753730 | safeandprotectltd.co.uk | SolarEdge Technologies, Ltd. | |
| 30012 | United Kingdom | Safegas Limited | Gemini House, Sandbeck Way, Wetherby, West Yorkshire, LS22 7DN | +44 1937 588181 | https://safegas.co.uk | | |
| 30013 | United Kingdom | Safeguard Electrical Engineering Ltd. | 7 Hill Rise, St Neots, Cambridgeshire, PE19 1ST | +44 1480 811700 | www.safeguard-electrical.co.uk | | |
| 30014 | United Kingdom | Safeheat Torbay Limited | Dainton Elms, Marldon Road, Ipplepen, Newton Abbot, TQ12 5TY | +44 1803 812090 | www.safeheattorbay.co.uk | | |
| 30015 | United Kingdom | Sage Building Envelope Contractors Ltd | 3 Sycamore Court, Birmingham Road, Coventry, West Midlands, CV5 9BA | +44 24 77464664 | www.sagebec.co.uk | | |
| 30016 | United Kingdom | Salop Energy Ltd | Unit 7, Maverick Business Park, 292 Monkmoor Road, Shrewsbury, SY2 5TF | +44 1743 236266 | www.salopenergy.com | Kyocera Corporation, Suntech Power Co., Ltd., Sharp Energy Solutions Europe, Panasonic Corporation (Sanyo), Hyundai Energy Solutions, Jinko Solar Holding Co., Ltd., LG Electronics, Inc. | SMA Solar Technology AG, Fronius International GmbH |
| 30017 | United Kingdom | Sangel Solar Technologies International | 68 King William St., London, EC4N 7DZ | +44 20 79404667 | www.sangeltech.com | SMA Solar Technology AG | |
| 30018 | United Kingdom | SAS & Trewartha's Plumbing and Heating Ltd | 1B Miller Court, Miller Business Park, Station Rd, Liskeard, Cornwall | +44 1579 340505 | www.feeltheheatuk.com | | |
| 30019 | United Kingdom | SASIE Ltd. | Waterway House, Waterway Street, Nottingham, NG2 3DY | +44 115 9161046 | www.sasie.co.uk | | |
| 30020 | United Kingdom | Save Energy UK Ltd. | 10, Albany Business Park, Cabot Lane, Poole, Dorset, BH17 7BX | +44 1202 986262 | saveenergyuk.co.uk | | |
| 30021 | United Kingdom | SaveHeatEnergy Renewables Ltd. | Unit 21, Beehive workshops, Durham, DH1 2XL | +44 191 3864062 | www.saveheatenergy.co.uk | | |
| 30022 | United Kingdom | Saving Energy Ltd. | Unit 19, Oban Court, Wickford, Essex SS11 8YB | +44 800 9549689 | www.savingenergyuk.co.uk | | |
| 30023 | United Kingdom | SBE Electrical & Security | 5 Roxholme Road, Leeds, Chapel Allerton, West Yorks LS7 4JG | +44 7831 441538 | www.sbeelectrical.co.uk | | |
| 30024 | United Kingdom | Scallan Renewables | 17a Janefield Place, Dundee DD4 7AD | +44 1382 451717 | https://www.scallanrenewables.co.uk | Canadian Solar Inc. | SolarEdge Technologies, Ltd. |
| 30025 | United Kingdom | SCD Group Limited | Norton House, Peckfield Business Park, Phoenix Avenue, Leeds, LS25 4DY | +44 333 3238300 | scd-ltd.com | | |
| 30026 | United Kingdom | SCJ Electrical | Ferguson Business Park West, Bedlington, NE22 7DH | +44 1670 811292 | https://www.scjelectrical.co.uk | | |
| 30027 | United Kingdom | SCL Electrical and Energy Limited | 6 Chartergate, Moulton Park, Northampton, NN3 6QF | +44 1604 790684 | sameracontracting.com | | |
| 30028 | United Kingdom | Scoop Electrical Services | 33, Glebe Gardens Grove, Wantage, Oxfordshire, OX12 7LX | +44 7885 363690 | www.wantageelectrics.com | | |
| 30029 | United Kingdom | Scott and Foggon Ltd | Unit 4, Oxnam Road Industrial Estate, Oxnam Road, Jedburgh TD8 6LS | +44 1835 863357 | www.scottandfoggon.co.uk | | |
| 30030 | United Kingdom | SCS Group | Brassey Road, Shrewsbury, Shropshire SY3 7FA | +44 1743 359888 | scsgroup.info | | |