Is plug-in solar legal in London?
The compliant route to install plug-in solar in the UK in 2026 is a CPS-registered electrician with a hardwired connection, typically £250 to £450. This applies nationwide, including London. BS 1363 (UK 13A plugs and sockets) and BS 7671:2018 + Amendment 4:2026 (the IET Wiring Regulations) do not currently authorise plugging small generating equipment into a 13A wall socket. The DESNZ Interim Product Specification, finalised in the government's July 2026 response but not yet in force, does not by itself amend BS 1363 or BS 7671.
For renters in London: the Renters' Rights Act 2025 means your landlord cannot unreasonably refuse a portable plug-in system that requires no permanent structural work. See our full renter's guide for how to approach this conversation.
London solar performance
London has the highest proportion of renter households of any UK region, around 50% of the capital's housing stock is privately rented. It's also the largest market for plug-in solar in the UK, both because of renter density and because London properties tend to have reasonable south-facing exposure despite the urban environment.
PVGIS data (EU JRC satellite irradiance database) puts London's average annual solar irradiance at approximately 961 kWh/kWp for a south-facing system at 35° tilt, the optimal angle for a static installation in the UK. Applied to an 800W system with a 0.85 system efficiency factor, this produces approximately 653 kWh per year.
Summer months (May–August) account for roughly 60% of London's annual solar generation. June is peak month, with irradiance values 4–5× higher than December. An 800W system in London will generate approximately 100–130 kWh in June and as little as 20–30 kWh in December. For home-workers or remote workers, consumption timing generally aligns well with generation.
London's urban heat island effect means temperatures slightly above the national average, which can marginally reduce panel efficiency at peak summer temperatures, but this effect is small (around 2–3%) and well within normal variation.
London solar adoption: DESNZ March 2026 numbers
Across the 75 parliamentary constituencies that make up Greater London, DESNZ recorded 62,774 domestic solar PV installations totalling 238 MW of capacity at the end of March 2026. London's per-household installation rate is the lowest of any English region, which reflects both the rental skew above and a housing mix with more flats and fewer pitched south-facing roofs. For the same release, Yorkshire and the Humber recorded 133,919 domestic installations and the South West 225,240.
These figures cover total domestic solar PV adoption of all types: predominantly rooftop systems installed under the Feed-in Tariff and successor schemes, plus a small fraction of unaccredited installations (where plug-in and balcony solar would sit). The numbers measure solar uptake in the area as a whole. They are not a count of plug-in solar specifically; DESNZ does not currently break out plug-in solar as a separate line in its monthly release.
Source: DESNZ, Solar photovoltaics deployment (Accredited Official Statistics, March 2026 release, published 30 April 2026). Full UK constituency dataset: CSV download.
What if my panels don't face south?
South-facing is optimal, but it's rarely a dealbreaker. East or west-facing panels produce approximately 80% of the south-facing figure, around 522 kWh/year in London, saving roughly £136/year. North-facing produces around 60%, still generating electricity, just with a longer payback period of around 7.3 years.
If you're on a high floor with an unobstructed view, east-west performance can be very good. The key variable is shading: a south-facing panel in partial shade will often underperform a west-facing panel with a clear skyline.
Your DNO: UK Power Networks
London is served by UK Power Networks. Under G98, you (or your CPS electrician) must notify UK Power Networks within 28 days of connecting your system to the grid. This is the "connect and notify" rule, you don't need approval before connecting, just notification after.
To submit your G98 notification to UK Power Networks, visit: ukpowernetworks.co.uk/connections. You'll need your address, MPAN (on your electricity bill), the installer's CPS registration number, and the inverter's G98 certificate number (included in your kit's documentation).
For more detail on the full G98 process, see our G98 / DNO notification guide.
Renting in London
London renters face a specific challenge: many purpose-built flat developments have shared roof access and restricted balconies. The most practical mounting for London renters is a balcony rail clamp system, which fits most iron and steel railing profiles common in Victorian conversions and post-war estates. Ground-floor and garden flat tenants often have the easiest access for a freestanding ground frame.
The practical path for renters is: get a portable ground frame or balcony rail clamp mounting (no drilling), order the kit, have a CPS electrician make the connection, and notify UK Power Networks within 28 days. When you move, take it all with you and re-notify the new DNO at your next address.
10 London areas that benefit most from plug-in solar
London has the rooftops but not always the access. Around a third of Greater London's surface is building roofs, and the Mayor's Solar Together London group-buying scheme and Solar Action Plan have pushed domestic solar, but they mainly help owner-occupiers with their own roof. Much of the city rents or lives in flats, where a rooftop array is not an option. For London's renters and flat-dwellers, a plug-in or balcony kit is the version of solar that actually fits.
Plug-in solar suits rented homes, where the Renters' Rights Act 2025 protects a portable system that leaves no permanent marks; flats with a balcony, of which London has more than anywhere in the UK; and outer-borough houses with a south-facing garden. Tenure varies sharply across the 32 boroughs: the 2021 Census recorded over 40% of homes privately rented in Kensington and Chelsea and fewer than 30% owner-occupied in Tower Hamlets, while Havering tops home ownership at 70.5%. The ten areas below stand out on tenure, housing type and aspect.
- Tower Hamlets. Fewer than 30% of homes are owner-occupied, by the 2021 Census, and the borough is dense with new-build balcony flats around Canary Wharf and Poplar. Balcony solar is built for exactly this.
- Newham. High private renting and lower average incomes, with Stratford's towers full of balconies. A bill saving lands hardest here.
- Hackney. Young, green-leaning renters in converted flats and new-builds, where a portable kit suits a short tenancy.
- Islington. Dense flats and Georgian conversions with high private renting. Conservation streets restrict rooftop PV, so a low-profile balcony panel is often the only route, subject to checking conservation status first.
- Lambeth. Brixton, Streatham and Clapham mix high-renter flats with terraces and rear gardens, and strong weekday occupancy from working at home.
- Southwark. Peckham and Bermondsey combine heavy social and private renting with riverside new-builds whose balconies face the Thames.
- Kensington and Chelsea. Over 40% of homes are privately rented, by the 2021 Census, mostly mansion-block flats in conservation areas where roof PV is restricted, leaving balcony and low-profile kits.
- Brent. Diverse and high-renter, with Wembley Park's wall of new balcony flats and good south aspects.
- Croydon. An outer borough mixing town-centre flats with suburban terraces and south-facing gardens, suited to either a balcony or a ground-mounted pair.
- Havering and Bexley. The capital's highest home ownership, Havering at 70.5% in the 2021 Census, in suburban semis and terraces with gardens where a freestanding kit beats the cost of a full roof install.
These are editorial picks based on tenure, housing mix and typical orientation, not a guarantee for any single address. Shading, the exact aspect of your balcony or garden, and your landlord's agreement decide the result, so check your own roofline or model your spot with the free shadow simulator, then run the postcode calculator before buying. Your DNO, UK Power Networks, must be notified under G98 within 28 days of connecting, and the compliant install route in 2026 is still a CPS-registered electrician with a hardwired connection, with the standard-plug route expected once the BSI plug-in solar standard publishes, expected July 2026.
Costs and what to budget
| Item | Cost |
|---|---|
| EcoFlow STREAM 800W kit (panels + microinverter) | £499 |
| Mounting frame or balcony clamps | £30–£80 |
| CPS-registered electrician (connection + G98) | £250–£450 |
| Total (estimated) | £779–£1,029 |
The DESNZ Interim Product Specification, out for consultation until 30 June 2026, is a product specification. By itself it does not amend BS 1363 or BS 7671, so the compliant install route in London remains a CPS-registered electrician. We track the standards on the changelog.
Questions specific to London
- Based on PVGIS irradiance data for London and a south-facing 800W system, approximately £170 per year at the April 2026 rate of 26p/kWh. East or west-facing installations save around £136–£153/year.
- UK Power Networks is the Distribution Network Operator for London. You notify them, not your electricity supplier, within 28 days of connecting your system. Visit ukpowernetworks.co.uk/connections to submit your G98 notification.
- Yes. The Renters' Rights Act 2025 means your landlord cannot unreasonably refuse a portable plug-in system. A no-drill balcony rail mount or freestanding ground frame leaves no permanent marks and moves with you when you leave. See our renter's guide for the full approach.
- No. Plug-in solar panels of this type are permitted development and do not require planning permission under current UK rules, as long as you're not in a listed building or conservation area with specific restrictions. If your property has these designations, check with your local planning authority first.
- It depends on your home. Plug-in and balcony solar suit London's renters and flat-dwellers, concentrated in inner boroughs like Tower Hamlets, Newham, Hackney and Kensington and Chelsea, and outer boroughs with south-facing gardens like Croydon, Havering and Bexley. Aspect, shading and landlord permission decide the result for any specific address.
Ready to install in London?
Browse the EcoFlow STREAM kits available now on Amazon UK, or calculate your exact savings using our PVGIS-powered calculator.
