A Shelly Power Strip 4 Gen4 in use behind a television

6 metered sockets, one system

The Energy Monitoring Kit

Stop guessing which appliance is taking the money. Six sockets that each report what is plugged into them, and switch it off when it should not be running.

No electrician Nothing is wired in. It plugs into sockets you already have, it works in a rented flat, and it moves house with you.

69 EUR 79.80 EUR Save 10.80

Free delivery. Ships from the manufacturer. Fourteen days to change your mind under EU distance selling rules.

No subscriptionWorks without internetNot tied to your supplier

What is in the box

Six sockets, because one number tells you nothing

Your meter already gives you one total for the whole house. These give you six separate numbers you can act on, and a switch behind each one.

1 ×

Shelly Power Strip 4 Gen4

Four sockets, each metered and each switchable on its own, plus USB. It replaces the extension lead behind your television, which is where standby actually lives.

2 ×

Shelly Plug M Gen3

Two roaming sockets for the appliances that live somewhere else. The freezer, the dryer, the dehumidifier, the second fridge in the garage.

The Shelly app showing per socket consumption

6 ×

Watts now, kilowatt hours over time

One tells you what a thing is drawing this second. The other tells you what it will have cost you by Christmas. You need both, and your meter gives you neither.

How they work together

Measure, find, automate. In that order.

Every energy product sells you the third step. Without the first two you are automating a guess.

Evening oneThe strip goes behind the televisionSet, box, console, soundbar, router. Six things on one lead that nobody has ever separated, and the first place standby hides.

Evening oneThe two plugs go on your suspectsWhatever you have privately blamed for the bill. Half the time this ends the argument by clearing it.

Week oneYou get a number instead of a hunchNot a rating off a label. What the machine in your utility room actually drew, this week, in euros.

Week twoThe shape tells you more than the numberAn appliance drawing the right power for far too long is an appliance that needs a seal, a defrost or a service. No label can tell you that.

From then onThe socket does it, not youA schedule instead of a habit, and a notification the week something changes rather than a settlement letter in ten months.

The deal

What it costs against what it replaces

79.80 EUR

The same devices bought separately on this store

69 EUR

As the kit, with free delivery

180 EUR

A professional energy audit. Once, and it ends in a PDF of estimates.

Comparison

Against everything else that claims to cut your bill

Including where we lose. A meter in your consumer unit sees more than this does. It also needs an electrician, and you cannot take it with you.

	Your supplier's app	One smart plug	Smart thermostat	Paid audit	This kit
Tells you which appliance did it	No	One at a time	No	Estimates	Six at once
Separates the six things behind your television	No	No	No	No	Yes
Shows how long an appliance ran, not just how much	No	Yes	No	No	Yes
Acts on what it finds	No	That socket	Heating only	No	Yes
Keeps measuring after the first month	Yes	Yes	Yes	No	Yes
Needs no electrician, works in a rental	Yes	Yes	No	Yes	Yes
Measures hardwired circuits with no plug	No	No	No	Estimates	No
Monthly subscription	Sometimes	No	Sometimes	No	No

The last row is the honest limit. Your water heater, hob, oven and fixed lighting are wired in and have no plug, so nothing here can see them. Measuring those means a meter inside your consumer unit and an electrician to fit it.

What buyers say

4.4 across 333 reviews of these two products

★★★★★

"Great useful product for controlling, monitoring and customizing your appliances."

A. · verified buyer, Power Strip 4 Gen4

★★★★★

"Working well, shows all power net information U, f, I, P, E."

z. · verified buyer, Plug M Gen3

★★★★★

"Great product with a lot of functions. BTHome works great."

S.K. · verified buyer, Power Strip 4 Gen4

★★★★

"Nice design, good features and easy configurability."

R.K. · verified buyer, Power Strip 4 Gen4

Before you order

The things worth checking

Do I need an electrician?

No, and not for any part of it. The strip replaces an extension lead, the plugs go in sockets. That is also why it works in a rented flat and why you can take it with you when you move.

Will it measure my water heater or my oven?

No. Anything wired in has no plug for this to sit behind. If your heating and hot water are electric, this sees the appliance half of your bill and not the heating half. If you heat with gas, almost your entire electricity bill is plug loads and it sees nearly all of it.

Six sockets is not many. Is it enough?

It is enough to find the problem, which is the job. Four stay behind the television permanently. The other two roam: a fortnight on the freezer, a fortnight on the dryer, a fortnight on whatever you have started to wonder about. Most people have their answer inside a month.

Does it work with my supplier and tariff?

It measures your own sockets, not your supplier's meter, so it does not care who bills you or what you pay. On a day and night rate it pays back fastest, because you can move the loads that will move.

Will it work without internet?

The schedules run on the devices themselves, so they keep going when the router does not. What you lose while it is down is the graph on your phone, not the automation.

Does it need a hub?

No. Both join your Wi-Fi directly and speak Matter, so they also work with Apple Home, Google Home, Alexa, SmartThings and Home Assistant without anything in between.

How much will it actually save me?

Nobody can tell you that honestly, because it depends on what you find. Households that can simply see their consumption use five to seven percent less, which is fifty to seventy euros a year on an average EU bill. What you do about the appliance you find is usually the bigger number.