Plug-in solar panels: what to know before buying

Compliant plug-in solar kits can now be used in England, Scotland and Wales. Before buying, check that the kit meets the rules and is suitable for your home. Plug-in use is not currently permitted in Northern Ireland.

Rules checked 5 September 2026. The change took effect in Great Britain on 27 August 2026.

What is plug-in solar?

A plug-in kit uses a small number of panels and an inverter to supply electricity through a suitable mains socket. It can help power appliances while the sun is out.

The permitted maximum output into the socket is 800 W. This is much smaller than a typical rooftop system, so think about the electricity you use during daylight rather than expecting it to power the whole home.

Check these points before buying

1. The product: choose a compliant model and check it against the official device register linked in the Energy Saving Trust checklist.
2. Your permissions: check planning requirements and any landlord, freeholder or lease conditions.
3. The mounting: panels must be secure and suited to the location. Follow the rules for walls and balconies, including restrictions on timber.
4. The socket and wiring: follow the manufacturer’s requirements. Ask an electrician if you are unsure whether your wiring is suitable.
5. The installation: use one device per property, plugged directly into a suitable mains socket. Do not use an extension lead or an adapted plug.
6. Registration: follow the official instructions to register the device after installation.

Read the buying and installation checklist

Will a kit suit your home?

Look for a secure position with good daylight and little shade. Consider when you use electricity: a small kit is most useful when you can use its output as it is generated.

Ask the seller about expected yearly generation, the full cost of mounting and any electrical work, and the warranty. Follow the supplied safety and shutdown instructions.

What about rooftop panels?

A professionally designed rooftop system can produce more electricity and may offer battery storage. If you have suitable roof space, compare the costs of a fitted system and how many panels might suit your home.