The roof was never the point
We have spent twenty years assuming solar lives on a roof, because that is where the expensive, bolted-down systems had to go. Plug-in solar lets you put the panels where the sun actually is, which is often not the roof, it is the open, south-facing corner of the garden that currently grows weeds. Free of the roof, you also lose the scaffolding, the roof-works quote, and the small heart attack when someone mentions your rafters.
A garden array has one big advantage a roof can never match: you can aim it. Roofs are stuck at whatever pitch and direction they were built. A ground frame can sit at the ideal tilt, around 30 degrees, pointing due south, which is the single biggest lever on how much electricity you actually get.
Where in the garden to put it
Four favourites cover most gardens. A freestanding ground frame, ballasted or pegged, in the sunniest open patch, which usually gives the best generation. A shed or summerhouse roof, if it faces somewhere between east and west through south. A solar pergola or canopy over a patio, which doubles as shade for you and a mount for the panels. Or a fence-line frame along a south or west boundary where lawn space is tight.
The only real enemy is shade, and gardens are full of it: trees, the house itself, next door's extension, that ambitious leylandii. Watch the garden across a sunny day and pick the spot that stays lit longest through the middle of the day, then confirm the numbers for your postcode with the savings calculator.
Getting the power back to the house, safely
A garden array sits further from the house than a balcony kit, so cabling and weatherproofing matter. The proposed UK rules and the safety study are clear on the principles: outdoor components and outdoor sockets need a proper ingress rating, at least IP55, so rain is a non-event, and the kit connects through one suitable socket using the manufacturer's own plug. That often means a weatherproof outdoor socket installed by an electrician, not an extension lead run out through a window, which is exactly the improvised setup the safety bodies warn against.
If you are near the coast, there is a genuine extra consideration: salt air corrodes. The interim specification even calls for salt-mist corrosion testing for kit used in marine environments, so coastal gardeners should pick hardware rated for it. For how the panels and microinverter fit together, see our microinverters guide.
What a garden array can save
Aimed properly, an 800W garden kit generates around 650 to 700 kWh a year across much of England, a little more in the sunny south. The national modelled saving for a south-facing 800W kit is about £124 a year at the Ofgem cap of 26.11p per kWh that runs from 1 July to 30 September 2026, since only part of that generation is used in the house as it is made. The DESNZ analysis, on more cautious self-consumption assumptions, lands a typical 800W saving between about £70 and £110 a year. The reason a garden often beats a roof in practice is simple: you put it at the right angle, in the sun, away from the chimney's shadow. The calculator shows what your garden can do.
The legal bit, kept short
Plug-in solar became legal in the UK on 27 August 2026 under SI 2026 No. 848, after Ofgem approved the G98 change on 11 August 2026. As of 15 September 2026, 48 kits from 13 manufacturers show as Compliant on the ENA G98 Type Test Register, 15 of them are on sale, and the cheapest is £432. A kit on the register plugs into an ordinary 13A socket and you self-notify your network operator afterwards, with no electrician needed. A CPS-registered electrician and a hardwired connection are required only for a kit that is not on the register. A modest garden array is generally permitted development, though listed buildings and conservation areas can have limits worth checking. The rules allow one device per household up to 800W. Status on the standards tracker.
Common questions about garden solar
- Yes. A garden ground frame, a shed roof or a solar canopy can host an 800W plug-in kit, and being able to aim it due south at the right tilt often beats a fixed roof for generation.
- Through one suitable socket using the manufacturer's plug, with outdoor parts rated to at least IP55. In practice that usually means a weatherproof outdoor socket fitted by an electrician, not an extension lead through a window.
- A modest freestanding garden array is generally permitted development, but height and siting limits apply, and listed buildings or conservation areas can restrict it. Check with your local planning authority if either applies.
- It can. Salt accelerates corrosion, and the interim specification calls for salt-mist corrosion testing for marine environments, so coastal gardeners should choose hardware rated for it.
Your garden is a power station waiting to happen.
See the ground-mount and panel kits on Amazon UK, or get your real savings number for your garden's sun and orientation first.
