Is plug-in solar as good as rooftop solar?

No, and it is not trying to be. A typical domestic rooftop system is four to five kilowatts and generates several times what an 800 VA plug-in device can. Plug-in solar wins on cost, speed, reversibility and access — not on output.

That needs care. The plug-in framework and the current network rules allow one plug-in solar device per household, and an existing installation changes the notification picture. If you already have rooftop solar, talk to us or your network operator before adding a plug-in device.

Which pays back faster?

It depends far more on your circumstances than on the technology. Plug-in has a much lower entry cost, so the absolute sum at risk is small; rooftop generates far more, so the absolute saving is larger. Neither is universally quicker, and anyone claiming otherwise is guessing.

Will plug-in solar get me export payments?

Assume not. The Smart Export Guarantee generally requires MCS certification or other evidence a supplier will accept, and the position for plug-in solar is uncertain. The value of a plug-in device comes from electricity you avoid buying.

Can I take a plug-in kit with me when I move?

Yes. That is one of its defining advantages. Unplug it, unballast the frame, put it in the car. A rooftop system stays with the building.

Does plug-in solar need an installer?

The framework is designed so a compliant complete device does not require an installer. It does require a suitable external socket on a circuit with modern residual-current protection — and any work on your fixed wiring, including adding that socket, is a job for a qualified electrician.

Comparison · Two different jobs

Plug-in solar vs rooftop solar: an honest comparison

They are not competitors. A rooftop system is a designed, installed, several-kilowatt asset attached to your building. A plug-in kit is a capped 800 VA appliance you stand in the garden and unplug when you move. If you own a suitable roof and can fund a full installation, rooftop generates far more. If you rent, lease, cannot use your roof, or simply do not want a five-figure project, plug-in is the only route that exists.

Last reviewed: 13 August 2026

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Plug-in output cap: 800 VA AC
Typical rooftop: 3–5 kW installed
Plug-in entry price: £599
Framework live: 27 August 2026

Side by side

Plug-in solar and rooftop solar compared
	Plug-in solar	Rooftop solar
Output	Capped at 800 VA AC; typically 600–1,050 kWh a year	Commonly 3–5 kW; several thousand kWh a year
Cost	£599 – £1,199, one purchase	Typically a four to five figure installed project
Installation	Self-set-up of a complete tested device; no scaffolding	Designed, scaffolded and installed by an accredited installer
Time to running	The afternoon it arrives	Weeks to months, survey to commissioning
Where it goes	Garden, patio or ground-accessible flat roof, free-standing	Fixed to the roof structure
Reversible	Yes — unplug and remove; goes with you when you move	No — it stays with the building
Renting or leasing	Feasible with the landlord or freeholder's permission	Rarely feasible for a tenant
Network process	G98 notification, handled by SocketPower	Installer handles notification and certification
Export payments	Do not assume any	Usually eligible for the Smart Export Guarantee via MCS
Power cuts	Stops — it is not a backup supply	Stops unless specifically designed with backup

When plug-in solar is the right answer

You rent, or you lease a flat, and a permanent roof installation is not yours to authorise.
Your roof faces the wrong way, is shaded, is too small, or is not structurally suitable.
You want to start generating this month rather than next quarter.
You do not want to commit a four or five figure sum to find out whether solar suits your household.
You may move within a few years and want to take the asset with you.
You have a garden, patio or accessible flat roof with a reasonable southern outlook.

When rooftop solar is the right answer

You own the property and the roof is suitable, unshaded and large enough.
You want to displace a substantial share of your annual consumption, not a slice of daytime load.
You want to pair generation with a home battery or an EV charger at meaningful scale.
You want export payments and are prepared to go through MCS certification.
You intend to stay in the property long enough to see the payback through.

If that describes you, get rooftop quotes. We would rather say so than sell you an 800 VA device that was never going to meet the expectation.

Can you have both?

Not straightforwardly. The current network rules allow one plug-in solar device per household, and an existing generating installation changes what your Distribution Network Operator already has on record. If you have rooftop solar and want to add a plug-in kit, the notification position needs checking first — find your network operator or ask us.

What about a battery?

Plug-in batteries and battery-integrated devices are outside this framework entirely. Storage has to be part of a conventional designed installation. See the regulation hub for the detail.

Putting the numbers in proportion

A 4 kW rooftop array in the Midlands might produce in the region of 3,400 kWh a year. The Pro Max 1260W, the largest plug-in kit we sell, models at a few hundred kWh below a third of that — because it is physically a third of the panel area behind an inverter capped at 799 VA.

The relevant comparison is not output per year, it is output per pound committed, per month of waiting, and per unit of disruption. Model your own case in the savings calculator, and see payback by region for the full dataset.

Common questions

See the kit range Estimate your savings Is plug-in solar legal?

Sources

Plug-in solar: final-stage impact assessment(opens in a new tab) — DESNZ (PDF)
Final Plug-in Solar Device Interim Product Specification(opens in a new tab) — DESNZ (PDF)
Energy Networks Association — connecting small-scale generation (G98)(opens in a new tab) — Energy Networks Association

Editorial note · Last reviewed 13 August 2026

Written and reviewed by SocketPower, a trading name of Storm Renewables Ltd (SC802881). This guide is general information about plug-in solar in Great Britain, not electrical design advice for your property. Always follow the instructions supplied with your product and use a qualified electrician for any work on your fixed wiring.

Keep reading

Plug-in solar in Great Britain: the framework covers single-phase solar PV with a maximum inverter apparent output of 800 VA, and SocketPower devices are limited to 799 VA continuous AC output. Plug-in batteries and battery-integrated devices are outside the framework and are not sold by SocketPower. The current G98 arrangements allow one plug-in solar device per household, and network notification remains required — SocketPower handles the applicable notification for kits bought from us. This framework applies in Great Britain from 27 August 2026 and not in Northern Ireland. Always follow the instructions supplied with your product, check that your socket and circuit are suitable, never use extension leads, multiway adaptors, travel adaptors or plug-in RCD adaptors, and obtain any permissions you need before installing.