In short: since 27 August 2026, small plug-in solar kits can legally be plugged straight into a socket in Great Britain. They are a cheap option for flats and renters, as long as the owner agrees.
Plug-in balcony solar
These are small kits, usually one or two panels, that you mount on a balcony, wall or garden and plug into an ordinary socket. The rules that came in on 27 August 2026 say:
- the kit’s output is limited to 800 watts;
- it must be a complete product that meets the official standard for plug-in solar, plugged directly into a fixed wall socket, never an extension lead or adaptor;
- you must tell your local electricity network operator within 28 days of connecting it, using a short online form.
A plug-in kit will not power your whole home, but it can cut your daytime bills. It does not currently qualify for Smart Export Guarantee payments.
If you rent
You need your landlord’s permission for any solar, including plug-in kits. If you are on a lower income, your landlord may be able to get rooftop solar paid for through the Warm Homes: Local Grant. See grants and loans.
If you own a flat
Rooftop solar on a block of flats usually needs agreement from the freeholder and often the other leaseholders, because the roof is shared. Some blocks share one system between all the flats. Check your lease, and speak to your managing agent before you get quotes.
Community energy
If solar at home is not possible, community energy groups let you invest in local solar projects and share in the returns. Search for groups in your area.
Own a house with a roof?
Get quotes for a full rooftop system from MCS-certified installers.