Plug-in solar installation

The defining feature of plug-in solar is that you set it up yourself. No scaffolding, no certificate, no waiting list. That does not make it a job to rush — most of what goes wrong is mounting, not electrics.

Do you need an electrician?

For a standard setup, no. The device is a consumer appliance with a plug on the end; it goes into a socket you already have. That is the entire point of the plug-in route, and it is why no installer certification is involved.

You should call a qualified electrician if:

• There is no weatherproof outdoor socket where the device needs to plug in and one must be fitted. This is notifiable work in England and Wales and typically costs £120–£250.
• The consumer unit is old, lacks RCD protection, or you are unsure of its condition.
• The outbuilding's supply is a long, unknown-provenance run you have never had checked.
• Anything about the existing installation looks damaged, scorched or improvised.

Siting: the decision that sets your output

Before you buy a bracket, spend a sunny day watching the spot. Orientation and shading determine most of your generation, and neither is fixable later without moving the whole thing.

• South is best, at a tilt of roughly 20–35°. East or west costs you meaningfully; north is not worth the hardware.
• Shade is worse than it looks. A fence panel, chimney or single branch across a panel in the middle of the day disproportionately cuts output.
• Watch the season. A spot clear in June may sit in the shadow of a neighbour's roof in October.
• Cable length matters. The device has to reach a real socket without an extension lead, so pick a location that respects that.

Mounting and ballast

A solar panel is a sail. Wind loading is the thing that damages plug-in installations in Great Britain, not electrical failure.

• Ground frames are the easiest and safest option. Weight them properly — slabs, blocks or ballast trays — to the manufacturer's figure, and more if you are on an exposed site.
• Flat outbuilding roofs suit tilt frames, but check the structure will carry both the panel and its ballast. Many garden buildings will not.
• Walls and fences need fixings into something structural. A feather-edge fence panel is not structural.
• Balcony railings need railing-specific brackets and, usually, permission — see permissions and our balcony guide.
• Pitched house roofs are out. Working at height and penetrating a roof covering is professional work.

The electrical side

• Plug directly into a fixed socket. No extension leads, no reels, no multi-way adaptors.
• Outdoors, the socket must be weatherproof and rated for outdoor use, with the cover closed on the cable.
• Route cable so it cannot be trodden on, mown, strimmed or chewed; clip it, do not coil it.
• One device per household — you cannot add a second to increase output.
• Keep the DC connectors dry and seated before the panel sees daylight.

The sequence

• Check the kit against the rules: 800VA AC output, up to 2,000Wp DC, one per household.
• Choose and observe the location across a full day.
• Assemble the frame on the ground and position it.
• Ballast or fix it to the manufacturer's specification.
• Mount the panel, then the microinverter in its shaded, ventilated position.
• Connect DC, route and clip the AC cable, then plug in.
• Register the device — see registration.
• Keep the paperwork, and photograph the installation for your own records.

Renting or leasehold

Ask first. A tenancy agreement usually restricts alterations and anything fixed to the building, and a lease will normally cover the exterior and communal areas. A free-standing ground frame that leaves no marks is the easiest thing to get agreed.

Afterwards

• Rinse the panel occasionally — British rain does most of it, but pollen and dust build up.
• Re-check fixings and ballast after the first serious gale, then annually.
• Watch for vegetation growing into what was a clear line of sun.
• Keep the plug and socket cover in good condition.