WattLock Energy Saver reviews
Updated October 2026 · WattLock UK team
An honest buyer guide: what WattLock is, its pros and cons, and how to judge it for yourself.
Quick answer
WattLock is a plug-in energy saver for UK sockets, sold only at wattlock.co.uk from £39. We're a new store, so we only show verified customer reviews – none are published yet. You can test it at home with a 30-day money-back guarantee.
Our honest overview of WattLock
- What it is
- A small plug-in energy saver for UK socket circuits
- Price
- From £39 (£26 each in the 3-pack)
- Fitting
- About 10 seconds, no tools
- Best for
- UK homeowners and renters who want a simple, no-app device
Our verdict: worth trying risk-free if you want a fit-and-forget device for each socket circuit and are happy to judge results with your own meter readings.
This overview is written by the WattLock UK team. Because we sell WattLock, we've kept it factual and included the downsides too. It isn't a customer review – verified customer reviews will appear on this page as they come in.
WattLock key facts
| Feature | Details |
|---|---|
| Plug | British 3-pin (no adaptor) |
| Inside | TrueWatt circuit with approved capacitor |
| Casing | Fire-resistant |
| Covers | One socket circuit per unit |
| Fitting | Plug in – about 10 seconds |
| App / Wi-Fi | None needed |
| Price | £39 for 1, down to £26 per unit in a 3-pack |
| Delivery | Free tracked UK delivery |
| Guarantee | 30-day money-back |
WattLock pros and cons
Pros
- Fits in about 10 seconds – no tools or electrician
- No app, Wi-Fi or batteries
- Made for British 3-pin sockets
- Fire-resistant casing
- Free tracked UK delivery
- 30-day money-back guarantee
Cons
- Results vary by home, appliances and tariff
- You need one unit per socket circuit
- Sold online only – not in shops
- No verified customer reviews published yet
Order WattLock
Up to 62% off- 1Enter delivery address
- 2Pay securely
- 3Dispatched with tracking
Free UK delivery
30-day money-back guarantee. Not happy? Send it back for a full refund. Read the terms. Secure Shopify checkout, prices include VAT.
Who WattLock is for – and who it isn't
A good fit if you:
- Want a simple device with no app, settings or installation
- Run appliances such as fridge-freezers, washing machines or tumble dryers every day
- Rent and can't make changes to your home
- Are happy to compare meter readings and use the 30-day guarantee
Probably not for you if you:
- Want a guaranteed, fixed reduction in your bill – nobody can honestly promise that
- Use very little electricity already
- Want remote control and timers – a smart plug suits that better
How to test WattLock yourself
- For 7 days, note your daily kWh from your smart meter or take a meter reading at the same time each day.
- Fit one WattLock on each socket circuit – see how to use WattLock.
- Record the same readings for the next 2–4 weeks, keeping your routine similar.
- Compare similar days – weather and daylight make a big difference.
- Not happy? Email us within 30 days for a full refund.
How to spot fake energy saver reviews
- Stock photos, no dates and no way to contact the reviewer
- "Review" sites ranking dozens of brands with near-identical wording
- Claims of halving a bill within days
- Five-star ratings on a brand-new product with hundreds of reviews overnight
- Reviews for lookalike products sold under a similar name on marketplaces
Fake reviews are illegal under UK consumer law. If a review sounds too good to be true, trust your own test instead. Read more in Is WattLock legit?, Does WattLock work? and Is WattLock safe?
Our review promise
- Only verified buyers with a real order number
- Critical reviews published alongside positive ones
- We never pay for, write or edit customer reviews
- No invented star ratings – ever
Share your WattLock review
Bought WattLock? Tell us how many circuits you have, how many units you fitted, how you measured, and over what period. We'll publish your review once your order is verified.
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Free UK delivery · 30-day money-back guarantee