115 answers on solar panels, plug-in solar, home batteries, portable power stations, planning, installers, costs and export payments in England, Wales, Scotland and Northern Ireland, each linked to its sources.
Reviewed · fast-moving answers are re-checked against the official pages every week
In England, Wales and Scotland, yes, for compliant devices. Since 27 August 2026 a qualifying plug-in solar device can be sold and plugged into a standard socket under SI 2026/848. In Northern Ireland, compliant kits can be sold but are not yet permitted to be plugged in. A kit is only lawful if it meets the government's specification, so an ordinary solar kit with a UK plug fitted is not automatically legal.
It caps what the inverter can feed into your home: up to 800 VA of apparent power and 3.5 amps. The panels can be rated higher, up to 2,000 W in total under the specification, but the inverter holds the output to 800 W, which manufacturers sometimes call clipping. The specification also says that if the panels add up to more than 960 W, a professional check of your wiring should be considered first.
Do I have to register plug-in solar or tell my network operator?
Yes. The Energy Saving Trust says you are legally required to register a plug-in solar device before you use it, on the UK Plug-In Solar Registration website, giving your name, postcode and the device's make and model. The government specification also requires your network operator to be notified when you connect and when you disconnect the device. Keep the confirmation you receive, and ask your network operator if you are unsure whether your registration covered that notification.
Should I plug in my solar kit or have it wired in?
Both can be lawful in England, Wales and Scotland. A compliant plug-in kit is designed to be plugged into a suitable socket by the householder. Having a system wired into your consumer unit by a qualified electrician costs more, but it gets its own protected circuit installed to wiring standards, which can be the safer choice in an older home or where you are unsure about the wiring. A wired-in system is not limited to 800 W and can include a battery, but it then follows the normal rules for solar: the installer notifies the network operator, and building and electrical safety rules apply.
Do I need planning permission for solar panels in England?
Usually not. Domestic solar panels are normally permitted development, meaning no planning application is needed, provided the conditions are met. The permitted development right was updated on 27 August 2026 to cover plug-in solar, with a transition until the end of 26 August 2027 during which you can follow either the old or the new rules. The conditions differ for houses and blocks of flats.
Do I need planning permission for solar panels in Wales?
GOV.WALES says fixing solar panels to the roof of a single dwelling house is likely to be permitted development, provided they are not above the ridgeline and project no more than 200 mm, with extra conditions for flat roofs and conservation areas. Those rights apply to houses, so flat occupiers are advised to contact their local planning authority. The GOV.WALES guidance does not mention plug-in or balcony solar, so check with your council before fixing plug-in panels.
Possibly, but you need permission first. The Energy Saving Trust advises tenants, leaseholders and residents of managed buildings to get permission from whoever is responsible for the building, such as the landlord, freeholder or building manager, before buying. It says to get explicit permission if you plan to drill into walls or need an external mains socket.
For most homes, installation is currently zero-rated. A 0% VAT rate applies to the installation of energy-saving materials, including solar panels, in residential accommodation in Great Britain from 1 April 2022 and in Northern Ireland from 1 May 2023, until 31 March 2027. The reduced 5% rate is scheduled to return after that unless the government extends the relief. The relief is tied to installation, not to materials alone.
The Energy Saving Trust says there is no exact formula and installers will advise. A sensible starting point is the electricity you use outside your cheapest hours, allowing for the part of the battery that cannot be used. For a home using Ofgem's typical 2,500 kWh a year, that works out at around 6 to 7 kWh. Homes with a heat pump or electric car usually need more.
The Energy Saving Trust recommends getting at least three quotes from MCS-certified installers. Businesses carrying out MCS installations must belong to one of two consumer codes approved by the Chartered Trading Standards Institute, the Renewable Energy Consumer Code (RECC) or HIES, which give you access to alternative dispute resolution if something goes wrong. Check the certification yourself on the MCS website rather than relying on a logo.
The Energy Saving Trust puts the average home solar system at around £7,600 for about 4.5 kWp, roughly 12 panels. Installation in a home currently has 0% VAT, under the relief scheduled to run until 31 March 2027. Prices vary with roof access, scaffolding and the equipment chosen, so compare at least three quotes.
Can I get paid for the electricity plug-in solar exports?
Not normally. Citizens Advice says that under the current rules you cannot be paid for unused power from a plug-in kit, so you use it or lose it. Smart Export Guarantee payments need an MCS-certified (or equivalent) installation, which a plug-in kit will not normally have, although you can ask your supplier what it offers.
Do I need an electrician to use a portable power station with solar panels?
No, as long as it stays a stand-alone set-up. The panel plugs into the portable power station, your appliances plug into the portable power station's own sockets, and it recharges from an ordinary wall socket like any other appliance. Nothing is connected to your consumer unit (fuse box), so there is no electrical installation work. An electrician is needed only if you want the portable power station to supply your home's own circuits, which requires a proper changeover (transfer) switch.
Is it worth charging a portable power station on a cheap overnight tariff?
It saves a little, but rarely enough to pay for the portable power station on its own. A 2 kWh unit takes about 2.2 kWh from the socket to fill and gives back roughly 1.75 kWh of mains power, allowing for losses. On an Economy 7 night rate of about 14p that costs around 31p, against about 46p for the same electricity at Ofgem's average single-rate price cap figure of 26.32p for October to December 2026 (Economy 7 day rates are higher, so the real gap can be bigger): a saving of about 15p, or roughly £55 a year if you empty and refill it every day. On an electric car tariff of around 7.6p the saving is nearer £105 a year. The real benefits are convenience and backup.
