Energy saving plugs in the UK
Updated October 2026 · WattLock UK team
An energy saving plug is a device you plug into a socket to cut wasted electricity. WattLock is a plug-in energy saver built for UK homes.
Quick answer
An energy saving plug is a device you plug into a socket to cut wasted electricity. WattLock is a UK plug-in energy saver that covers a whole circuit, from £39.
Types of energy saving plugs
- Smart plugs – switch appliances on and off by app or timer
- Standby plugs – cut power to appliances on standby
- Plug-in energy savers like WattLock – work on the whole circuit they're plugged into
Why people choose WattLock
- No app, no Wi-Fi, no subscription
- One unit covers a whole socket circuit, not a single appliance
- Built to the UK plug standard with a fire-resistant casing
- 30-day money-back guarantee
| Bundle | Price | Was | Price per unit | Typical home |
|---|---|---|---|---|
| 1 × WattLock | £39 | £78 | £39.00 | Flat or small bungalow (1 circuit) |
| 2 × WattLock | £59 | £156 | £29.50 | 2–3 bed house |
| 3 × WattLock | £78 | £234 | £26.00 | House with separate kitchen circuit |
| 4 × WattLock | £117 | £312 | £29.25 | Large home or extension |
What is an energy saving plug?
'Energy saving plug' is used to describe several different products. Smart plugs switch appliances on and off on a timer or from your phone. Standby-killer plugs cut power when a TV is switched off. Plug-in energy savers like WattLock are designed to work on the circuit itself rather than a single appliance. Knowing which type you need saves money and disappointment.
Which type is right for you?
- Want to schedule a heater or lamp? A smart plug suits you.
- Annoyed by TV standby lights? A standby saver plug works well.
- Want a fit-and-forget device for each socket circuit? That's where WattLock fits.
- Want the full picture of your usage? Ask your supplier for a free smart meter.
Buying an energy saving plug safely in the UK
Choose a plug made for British 3-pin sockets, sold by a seller with a UK address for returns and a clear money-back guarantee. Be wary of listings that promise to cut your bill by a fixed percentage, show foreign plugs, or don't explain what's inside. WattLock comes with a UK plug, fire-resistant casing, free tracked delivery and a 30-day money-back guarantee.
Frequently asked questions
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