Plug-in solar FAQ
The questions everyone asks about plug-in solar in the UK.
Is plug-in solar legal in the UK?
Yes. Plug-in solar became legal across England, Scotland and Wales on 27 August 2026 under SI 2026 No. 848. Before this, typical plug-in kits did not fit cleanly within UK wiring rules.
Do I need an electrician or installer?
No. Kits are designed to plug into a standard UK socket via a microinverter. No MCS certification is required for typical balcony kits. If you have any doubt, a quick chat with a qualified electrician is always sensible.
How much can I save?
The government estimates up to £110 a year for a typical household, covering around 20% of average household electricity use. Actual savings depend on sunlight, kit size and how much power you use during the day.
Can I use it if I rent or live in a flat?
Usually yes. Balcony or window mounting needs no structural changes, which is why plug-in solar is sometimes called balcony solar. Check with your landlord if you rent, but many systems can be installed and removed without leaving a mark.
Do I need a battery?
No. Without a battery, the system offsets daytime usage - the simplest and cheapest option. Many kits are expandable, so you can add a battery later if you want to use more power in the evening.
Is it safe to plug into a normal socket?
Yes, when you use a UK-market kit with a certified microinverter and a BS 1363 plug. The microinverter ensures power is fed safely and synchronised with the grid. Only buy kits designed for the UK market.
What is a microinverter?
A small device that converts the DC electricity from the solar panel into AC electricity matching your home supply. It is built into or supplied with plug-in solar kits and is what makes safe "plug and play" operation possible.
Where can I buy a kit?
Major retailers including Argos, Amazon, Currys, B&Q, Screwfix and Lidl are stocking plug-in solar kits since the market opened. See our comparison for a shortlist.
How long do the panels last?
Solar panels typically carry 25-year warranties and can keep producing for longer. Check the inverter warranty separately, as inverters usually have shorter lives.
Will it power my whole house?
No - plug-in solar is designed to offset a portion of your electricity use (around 20% for a typical household), not to replace your supply. For whole-home solar you would need a conventional roof installation.