What is plug-in solar, and how does it work in the UK?

Plug-in solar is a complete, matched set of solar panels and a microinverter, supplied with a manufacturer-fitted mains plug. It connects to a standard household socket, and your home uses that solar electricity first, drawing less from the grid. Under the Great Britain 2026 framework a device is limited to 800 VA of AC output, so it offsets part of your usage rather than powering a whole home.

A plug-in solar kit is a single, tested combination of solar panels and a microinverter, supplied as one product with its own connection lead. The panels stand on a patio, garden or ground-accessible flat roof using the supplied mounting hardware; the microinverter converts their DC output to mains AC; the lead plugs into a suitable socket. Nothing is spliced into your fixed wiring, and nothing about the kit is assembled by you from loose parts.

You will see the same idea described as plug in solar panels, plug and play solar, a mini solar system, balcony solar panels or a balcony power plant. The vocabulary comes from continental Europe, where these systems have been common for years. The hardware concept is the same; the rules that govern it in Great Britain are new and specific.

What it is not

Plug-in solar is not a rooftop installation, and it is not a battery product. It does not power your home during a power cut, it does not replace a full PV system, and it is not designed to be expanded with extra panels bought separately. The value is in a modest, honest reduction of the electricity you buy while the sun is on the panels.

If you already understand the principle and want to see hardware, SocketPower supplies complete UK plug-in solar kits — including the 800W-class kits covered by this framework.

Output follows daylight. On a bright day a kit near its rated output covers a good share of the background load a home always draws — fridge, router, standby, hot water controls — and any appliance running at the time. What you do not use in that moment flows out to the network.

This is why self-consumption matters more than headline wattage. A kit that generates while you are out and nothing is running saves less than the same kit in a household with daytime occupancy. That is one reason we do not publish a single headline savings or payback figure — it would be meaningless across different homes.

The Plugs and Sockets etc. (Amendment) Regulations 2026 came into force on 27 August 2026. Alongside the Government's July 2026 response and the final interim product specification, they set out what a compliant plug-in solar device is and how it may be supplied and used.

The 800 VA figure is an AC apparent-output limit at the inverter, not a limit on panel capacity. That is why a kit can carry more than 800 W of panels: the DC array is deliberately larger than the AC output so the inverter runs closer to its ceiling for more of the day, while the AC output stays inside the limit at all times.

The deeper legal detail — the product specification, BS 1363, the role of BS 7671 where fixed wiring is involved and the Northern Ireland position — is covered in our legality guide.

Three things decide it: somewhere to put panels that gets real sunlight, a socket and circuit that are suitable, and permission to proceed if the property is not entirely yours to alter.

If you rent or live in a flat, the permission question usually matters more than the technical one — see plug-in solar for renters and flats. If your outdoor space is a balcony, see our guide to balcony solar.

Because every compliant device shares the same AC ceiling, kits differ mainly in DC panel capacity, physical footprint and what is included. The SocketPower range is complete matched kits, all all with one microinverter limited to 799 VA:

Prices shown are current RRPs and include VAT where applicable; they are not an installation offer and nothing here is described as zero-rated installation. How to weigh those differences against each other is set out in our buyer's comparison guide, and what arrives in the box is listed on kit contents and setup.

Two obligations sit alongside the purchase. First, network notification: your DNO must be told about the device under G98, and SocketPower handles the applicable notification for kits bought from us — the detail is in the G98 guide and the notification service page.

Second, electrical safety. The socket and circuit must be suitable, residual-current protection must be present, and the manufacturer's instructions must be followed exactly. Never use an extension lead, multiway adaptor, travel adaptor or plug-in RCD adaptor with a plug-in solar device. The full set of checks is in the safety guide.