Solar installers across London
From Kingston to Harrow, Bromley to Ealing, our engineers fit solar and batteries on London homes and businesses. Free survey, clear quote, one tidy team from start to finish.
- 20+ years
- Family-run
- Which? Trusted Trader
Get your free quote
No-obligation. We'll call you back to talk it through, usually the same working day.
London boroughs and towns we cover
We are based just outside the capital in Walton-on-Thames, so south and west London are on our doorstep. We also work across the rest of Greater London.
South and south-west London
Kingston upon Thames, Surbiton, Richmond, Twickenham, Wimbledon, Sutton, Croydon, Putney, Wandsworth.
West and north-west London
Ealing, Hounslow, Hillingdon, Uxbridge, Harrow, Brent, Hammersmith and Fulham.
North and east London
Barnet, Enfield, Haringey, Waltham Forest, Redbridge, Havering.
South-east London
Bromley, Bexley, Lewisham, Greenwich, Lambeth, Southwark.
Not sure we reach your street? Send your address and we will confirm in one call.
Solar that suits London homes
London roofs are not all the same, and neither are the people living under them. Here is what we plan for.
- Terraces, semis and mansion blocks. We design around chimneys, dormers and shared walls, and tell you honestly how many panels your roof can take.
- Flats and small roofs. Limited space is where a battery and efficient panels earn their keep. Ask us what is realistic.
- Tight streets. We plan scaffolding and deliveries around narrow roads and parking restrictions before install day.
- Shops, offices and workshops. Commercial roofs across the capital, with help on planning permission where it is needed.
Tell us what your roof looks like and we will say what London homes like yours usually fit.
How your install runs
The same four steps in every area. Nothing hidden.
Free survey
We look at your roof, your meter and how you use power, and answer your questions.
Design and quote
A clear, no-obligation quote with the right panels, inverter and battery for you.
Install
A tidy install by our own engineers, then your apps set up and the system explained.
Looked after
Paperwork handled, and maintenance and health checks available when you want them.
Book your free survey and see your own numbers before you decide anything.
What customers say about SW3
Real reviews from homeowners we have installed for.
Excellent service from initial enquiry through to completion. Paul and Chris run a great team and are hands on to ensure everything runs smoothly. Installation was carried out in just one day and we were briefed thoroughly about the system before they left. Wouldn't hesitate to recommend SW3 and so happy we found them.
SW3 installed an excellent system to our home and provided exceptional service. They prioritise customer satisfaction. They strived to meet even our bespoke requests and their rates are fair. Kudos to Chris for the wonderful process from the initial discussion til post-installation, and for always keeping me updated. Kudos also to Matt who installed our system and who was really hardworking and knowledgeable. I would definitely recommend SW3 to everyone.
We were quoted for 14 panels and 2 batteries and an installation date was set for 2 months later. Everything was delivered on time and the team arrived when agreed. The work was carried out by one electrician who was excellent. It was a very neat installation and done in a day and a half. Any queries were dealt with promptly and to our satisfaction. We would recommend the company.
Want the same experience in London? Ask for your free quote today.
Why London homeowners choose SW3
20+ years
Over two decades of renewable energy experience behind every install.
Fully insured
All our work is insured and backed by guarantees.
Family-run
You deal with the same small team, names you will recognise by the end.
No obligation
Free quotes with no pressure and no hard sell.
Compare us with anyone. Our quote is free and you can sleep on it.
Solar in London: quick answers
Do you install solar in my part of London?
We cover Greater London. Put your postcode in the checker on this page or call us on 0204 538 1967 and we will confirm straight away.
Will I need planning permission in London?
Most home installs do not, but listed buildings and some conservation areas can be different. We check before we quote and tell you what to expect.
Can I have solar on a flat or small roof?
Often yes. Flat roofs can use tilted mounting frames, and a battery helps make the most of a smaller array. A survey will tell us what fits.
More questions? Call us and talk to a real person.
Other areas we cover
Looking for something else? See domestic solar, battery storage or commercial solar.
Ready to go solar in London?
Tell us a little about your home and we will come back with a free, no-obligation quote. Or ring, we are happy to talk it through.