Are Plug-in Solar Panels Legal in the UK?

Yes — in Great Britain, compliant plug-in solar products can now be connected directly to a standard UK mains socket, subject to the applicable product and safety requirements. The position changed in 2026 when the government introduced a simplified framework and an interim product specification for plug-in solar devices. Northern Ireland is treated separately, and other rules — planning, leases, building rules and safe mounting — still apply.

How many solar panels are you allowed to have in the UK?

There is no single maximum number of solar panels that applies to every UK solar installation. Rooftop systems, for example, are limited mainly by roof space, planning rules and the connection arrangements agreed with the network operator.

For plug-in solar panels in Great Britain, the limit is set by the product rather than by a panel count. The current interim product specification limits a plug-in solar product to a maximum apparent power of 800 VA, and currently allows one plug-in solar product per household. So if you are asking "how many solar panels can I have?" for a plug-in system, the answer depends on how the compliant product is designed — not on a fixed number of panels.

Planning rules, your property type, where and how the panels are mounted, lease or freeholder requirements and nation-specific rules may still apply. Our regulations page sets out the current position, the best plug-in solar kits guide explains what to look for in a compliant system, and the savings calculator shows what an 800W setup could realistically save.

What changed in 2026

Before 2026, there was no simplified route for consumer plug-in solar in Great Britain, and connecting generation through an ordinary socket was not an approved arrangement. The government's regulatory amendment and interim product specification created a defined category of plug-in solar devices that can be connected through a standard socket when the product meets the specification.

The specification is described as interim, so details may change. We record the version and date of the source we rely on below, and update this guide when it changes.

Connecting to a standard socket

A compliant plug-in solar product is designed to connect through a standard BS 1363 plug and socket. That does not mean any panel and inverter can be plugged in. Check that:

• the product states that it meets the current interim product specification
• you follow the manufacturer's instructions for connection
• the socket is in good condition and suitable for the product
• you do not use extension leads, multi-way adaptors, travel adaptors or modified plugs

If you are unsure about the condition of your electrical installation, or a socket or circuit needs to be installed, altered or assessed, use an appropriately qualified electrician. Our guide to whether you need a special socket and the plug-in solar safety checklist cover this in more detail.

Notifying your network operator

Generation connected to the electricity network is covered by connection rules administered by Distribution Network Operators. Read our guide on whether you need to notify your DNO for what currently applies to plug-in solar and how to find your network operator.

Planning permission

Freestanding and wall-mounted panels on many houses fall within permitted development, subject to size and siting limits. Listed buildings, conservation areas and flats are treated differently, and balcony-mounted panels may need consent from the freeholder or managing agent regardless of planning status. Planning rules also differ between England, Wales and Scotland.

Renters and leaseholders

Being legal does not remove the need for permission. Tenants usually need the landlord's written agreement, and leaseholders usually need consent from the freeholder or managing agent before attaching anything to a balcony, wall or railing. See landlord and freeholder permission and can tenants install plug-in solar.

Batteries

Plug-in battery systems and plug-in solar devices integrated with batteries are outside Great Britain's current simplified plug-in solar framework. Read can you use a battery with plug-in solar before buying a kit that includes one.

Northern Ireland

The Great Britain framework does not automatically apply in Northern Ireland. Read is plug-in solar legal in Northern Ireland before buying.

Practical checklist

• The product states it meets the current interim product specification (maximum 800 VA)
• Only one plug-in solar product per household
• Connected as the manufacturer specifies, directly into a suitable standard socket
• No extension leads or adaptors
• Any network operator notification that applies has been made
• Written permission from the landlord, freeholder or managing agent where needed
• Mounting hardware that is secure and suitable for wind at your location

This guide is general information, not legal or electrical advice.