Installer fitting a black solar panel on a sunny roof

Family-run solar, fitted right first time

SW3 Green Energy has been installing across London and the South East for over 20 years. We survey, design, fit and sort the paperwork, so you just enjoy lower bills.

Which? Trusted Trader
Which? Trusted TraderApproved for solar, batteries and EV chargers
  • 20+ years
  • Family-run
  • Fully insured

★★★★★“Installation was carried out in just one day and we were briefed thoroughly about the system before they left.”

Caroline Warwick, SW3 customer

Get your free quote

No-obligation. We'll call you back to talk it through, usually the same working day.

We only use your details to reply about your quote.

Certified, accredited and reviewed by the people who check installers

Which? Trusted TraderMCS certifiedNICEIC approved contractorRECC memberHIES accredited memberTrustMarkNAPITFlexi-OrbGivEnergy approved installerAllume SolShareThe Renewable Energy Hub approved installerCheckatradeTrustpilotYell

Everything to make, store and use your own power

Solar PV and battery storage are our specialism. We also fit heat pumps and EV chargers, and look after systems once they're up.

Not sure what you need? Tell us about your home and we'll suggest a sensible setup.

We handle it all, start to finish

From the first chat to the final paperwork, one family team looks after your project. You'll know who's coming and what happens next.

  1. Free survey

    We visit, look at your roof, meter and usage, and answer every question.

  2. Clear quote

    A detailed, no-obligation quote with the setup we'd recommend and why.

  3. Installation

    Our own engineers fit your system, often in a single day, and leave it tidy.

  4. Set up and aftercare

    We connect your apps, register with your energy supplier and stay on hand.

What our customers say

Rated on Which? & Checkatrade

Real reviews from homes we've fitted. You'll meet the same names: Chris, Paul, Sherri, Matt and Constantine.

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.

Caroline WarwickSolar installation

A big thank you to Chris, Paul, and the whole team at SW3 Green Energy Services Ltd! A couple of months ago, I had a 15-panel solar system installed, complete with microinverters and a Powerwall battery. I'm already seeing real savings, especially with being able to make the most of off-peak rates and getting good returns from my energy provider's export rates.

What really impressed me about SW3 Green Energy was their reliability and professionalism. They were on top of everything from the first quote to the final paperwork. My setup was a little complex, with specific requirements around the placement of the Gateway and Powerwall, plus integration with my Zappi EV charger. They handled it all seamlessly.

Even when my energy provider botched the smart meter installation, leaving my system down, Chris came back to sort things out and got it up and running again.

Shaun Day15 panels, micro-inverters, Powerwall

Stellar experience from start to finish. Chris, Paul, Sherri and anybody on their team has been extremely competent and nice to deal with. They inspected my property, provided a detailed survey suggesting a sensible setup, with good explanations about how it would all work together and they provided a very reasonable quote, with highest quality materials. By the end of the day they were able to get all my apps set up and properly configured with the energy provider.

Enrico BerardoSolar and battery

I'd highly recommend using SW3 for my new solar panels and battery purchase and install. The entire process was so smooth, from initial booking to the quick installation on the day. Thank you.

IGD LimitedSolar panels and battery

Very professional from start to finish. Excellent communication, installation of solar panels, battery charger and other equipment was on time and Constantine, the engineer, worked tirelessly with a minimum of fuss and bother. Follow up has also been excellent. Thank you.

Andrew HoskinsSolar, battery charger and equipment

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.

Margaret Paul14 panels and 2 batteries

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.

Rafael dela CostaHome solar system

Join them. Get a free, no-obligation quote from the same team.

Years of keeping it simple and above board

Our green energy story began in the heart of London over two decades ago. We're still family-run, and still the people who answer the phone.

Over 20 years

Reliable renewable energy systems that stand the test of time.

All above board

All our work is fully insured and backed by solid guarantees.

Family first

Rooted in London and the surrounding communities, with a personal service.

No obligation

Hassle-free quotes. It starts with a simple conversation.

SW3 Green Energy's fully electric van, wrapped in solar panel artwork, parked on a street
A member of the SW3 team standing in front of a company van

A brand new, fully electric van fleet

Part of practising what we preach. Look out for us on your street.

Installing across London and the South East

Based in Walton-on-Thames, our engineers cover London, Surrey, Kent, both Sussexes and the South West.

Map of our service area: Greater London, Surrey, Kent, East and West Sussex, Hampshire, Hertfordshire and Essex
Our core service area. Further afield? Give us a call.

Offers and new services

Switch to Octopus and get £50 off your first bill

Sign up to Octopus Energy's 100% renewable electricity through our referral link and £50 comes off your first bill. Octopus also has export tariffs that suit solar homes.

Octopus Energy logo

New: solar battery covers

Protect your investment from weather and wear. A cover helps an outdoor battery last longer and keeps it performing at its best.

Refer a friend

Know someone thinking about solar? Send them our way and we'll say thank you.

Want to know what solar could do for your bills? Ask for a free survey.

Why homeowners are going solar

  • Lower bills. Solar can cut electricity bills by up to 80%, depending on how much you use and when.
  • Earn from what you don't use. Sell spare electricity back to the grid on an export tariff.
  • Low running costs. Panels need little upkeep once installed.
  • A smaller carbon footprint. Clean power from your own roof.
  • Charge your EV from the sun. Pair solar with a smart charger like a Zappi.
Rows of solar panels under a blue sky

Ready to make your own power?

Tell us a little about your home and we'll come back with a free, no-obligation quote. Or just ring, we're happy to talk it through.