Solar Panel Installers London
Looking for solar panel installation for your London home?
You have the choice of using a national solar panel installer or a local solar panel installation company. While below we discuss some of the pros and cons of each, first, here is a list of solar panel installers based in London that have achieved excellent customer ratings in 2026.
We've also included information regarding the areas they cover and the brands they work with.
| London Solar Panel Installers | Area | Brands include: | Google Customer Rating | TrustScore | Year Incorporated |
|---|---|---|---|---|---|
| Efficient Home Energy Ltd | Based in Bromley; installs in London and Kent | Sharp and AEG for the panels and Growatt for inverters | 4.9 | 4.9 | 2015 |
| Joltify | Based in Kingston upon Thames, installing across South London and the M4 & M3 corridors | SolarEdge, GivEnergy, Growatt, myenergi, Fox ESS | 4.9 | 2020 | |
| PET (Personal Electric Technology) | London | Canadian Solar, JA Solar, Jinko, Longi, myenergi, SolarEdge, SunSynk, GivEnergy, Fox ESS, PylonTech | 4.8 | 2022 | |
| Solar4good | Head office in Harrow, with other offices in Leicester, Basildon, Glasgow, Exeter and Manchester | Canadian Solar, JA Solar, Jinko, myenergi, GivEnergy, Fox ESS, PylonTech, Q Cells, SolaX, Solis, Trina Solar | 4.9 | 2020 | |
| Tarven Solar Energy | Based in Orpington, covering Kent and the south east including Maidstone, Dartford, Sevenoaks, Croydon, Sidcup, Bromley, Bexley, Tunbridge, Farnborough and everywhere in between | Suntech, Trina Solar, Jinko, SolarEdge, Sunsynk, myenergi | 4.9 | 4.8 | 2017 |
| SW3 GREEN ENERGY SERVICES | Based in Walton On Thames; installs in Croydon, Redhill & Surrounding Areas | JA Solar, GivEnergy, SolaX, Sunsynk, SolarEdge, Enphase | 5.0 | 4.8 | 2022 |
| The Solar Co. | Based in Bromley | Canadian Solar, JA Solar, SolarEdge, Sunsynk, Solis, Tesla Energy | 4.9 | 4.7 | 2020 |
Note: of the above list, we should point out that the company with the highest TrustScore and one of the highest Google customer ratings, Efficient Home Energy Ltd, is not the same as the large, national company with the nearly identical name, Effective Home, which is based in Yorkshire. There are a few larger, nationwide installers headquartered in London as well, including Joju Solar (TrustScore 4.3) and Evergreen Power Solar (TrustScore 4.4), who also have an office in Leicester.
The companies listed in the table above are based in London, maintain active MCS certifications for 2026, and have strict TrustScores of at least 4.6 out of 5 from at least 30 customer reviews, alongside Google customer ratings of at least 4.4 out of 5 (where available).
The companies above can be a great starting point for your research, but of course, there may be other London installers more suited to your specific property needs. The above list is meant to be a list of local companies based in London—but there are many other companies that are based elsewhere yet frequently install in London. You may also want to read our related article about the best national solar panel installers, such as Effective Home and Glow Green, which readily install across the capital.
Check Google Maps for other solar installers in your area, and you can even contact neighbours with solar panels to ask about their installers. First-hand, personal recommendations can be a fantastic source of information!
Should I use a local solar panel installer in London, or a national installer?
When deciding which type of installer to use, here are some factors to keep in mind:
Pros and cons of using a national company
A national company might be better at the following:
- Quick quote turnaround
- Offering lower prices due to volume bulk-buy discounts
- Deep product knowledge (e.g., if they exclusively work with a limited set of flagship products)
A national company might be worse due to the following:
- Installation teams might be outsourced/contracted out to third parties
- Limited solar panel manufacturers only (e.g., some install only one or two types of panels)
- Quote and technical survey might be conducted online or over the phone (not on-site)
In addition, national companies tend to have been in operation much longer, whereas some of the local companies are quite young and less established. Ensuring your chosen company has the financial stability to honour a 10- or 20-year warranty is crucial.
Note: 'Online' or 'phone-only' quotes and technical surveys are great for efficiency—you can get a quote in literally minutes. But an on-site technical survey can save you time in the long run and helps ensure the system you get is truly optimised for your home. For example, it can be difficult for remote software to accurately estimate how many panels can actually fit around complex London roof lines, dormers, or chimneys. If your roof space is at a premium, you need a physical survey to safely maximise the panel count.
Want to learn more? Read our related article about the best national solar panel installers.
Pros and cons of using a local London solar panel installer
A local company might be better at the following:
- Installation teams are much more likely to be in-house staff (as opposed to contracted out)
- Knowing the specific planning permission quirks and shading realities of dense London boroughs
- More personalised "hand-holding" customer service
- Having your company nearby in case of problems or hardware faults
- On-site quotes and surveys are the default (vs. remote)
- Sourcing specific equipment you desire (they may be less likely to have strict, exclusive partnerships with specific manufacturers)
A local company might be worse due to the following:
- Quote turnaround and installation wait times might be slower
- Because they do less volume, they may not be able to pass on the massive bulk-buy discounts that national brands offer