Energy & efficiency
Smart meters: what they do (and don’t)
Few household gadgets attract more folklore than the smart meter. In practice it is a free meter that sends its own readings, unlocks the cheapest tariffs going, and occasionally sulks. Here is what it actually does, what it does not, and the fix path when yours goes quiet.
By the Tickover team · Published 20 May 2026 · 5 min read
What a smart meter actually is
Two parts. The meters themselves replace your old gas and electricity meters and send readings automatically over a dedicated secure network, not your wifi and not your broadband. The in-home display, the little screen everyone pictures, is only a window onto them. Estimated bills end the day it all goes in.
It is free from your supplier, installed by their engineer, and should never cost you a penny. If anyone rings or knocks offering to fit one for money, that is not how any of this works. Book it through your supplier and pay nothing.
The display is the point
Kilowatt-hours are abstract; pounds per hour are not. Watching the display tick upwards while the kettle, the tumble dryer or the forgotten heater runs is what actually changes habits. Give it one ordinary week to learn your baseline, then start experimenting with schedules and thermostat settings. It is step one of the bill-cutting order for a reason: you cannot cut what you cannot see.
Getting one fitted
Book through your supplier
Online or by phone, free, with both fuels usually swapped in a single visit.
Clear a path to your meters
Empty the cupboard under the stairs or wherever they hide. The engineer needs proper access.
Expect a short power-off
Each supply goes off briefly while its meter is swapped. Plan around anything that minds.
Have the display demonstrated
The engineer pairs it and shows it working before leaving. Keep it plugged in somewhere you will actually see it.
Watch one normal week
No experiments yet. The baseline week is what makes every later change measurable.
Half-hourly data, cheaper hours
The quiet superpower is half-hourly readings, because they unlock time-of-use tariffs: cheap overnight windows for charging an electric car, and export payments if you have solar panels. None of that works on an old meter that gets read four times a year. Knowing what the house actually costs to run also feeds a sensible maintenance budget, which is where the meter earns its keep long after the novelty fades.
| The myth | The fact |
|---|---|
| It uses my wifi | It has its own secure network; no broadband involved |
| It will put my bills up | It measures; your tariff prices. Estimates end |
| It breaks if I switch supplier | Current meters switch cleanly; early ones are being caught up |
| It watches everything I do | It records usage totals, and you choose how often it shares |
| You have to pay for one | Free from your supplier, always |
| No display means it is broken | The display is optional; the meter still does the work |
When a smart meter goes dumb
The classic complaint: the display sits blank or stuck on “waiting”, and bills quietly drift back to estimates. The fix path depends on which part lost touch, so start by working out whether it is the display or the meter itself.
The revive ritual
Check your bill first
Actual readings still arriving means only the display has lost touch. Estimated readings mean the meter itself has gone quiet.
Restart the display next to the meter
Charge it, power it off and on, and let it re-pair within a few metres of the electricity meter. Range is short.
Ask your supplier to reconnect it
They can nudge the connection remotely and re-pair displays. First-generation (SMETS1) meters that went dumb after switching are being migrated onto the national network; ask where yours sits in the queue.
Send manual readings meanwhile
A monthly photo of the meter keeps bills real while the smart side gets sorted.
Prepay and privacy, calmly
A smart meter runs in credit or prepay mode, and moving between them is a settings change by the supplier, not a new meter. Prepay top-ups happen from your phone rather than a shop counter, and strict rules govern switching anyone to prepay without consent. In a power cut the display may go blank, but your credit and readings sit safely in the meter itself; the power cut checklist covers the rest of that drill.
On privacy: the meter records how much energy you used and when, not what you used it for, and you choose how often it shares, from monthly down to half-hourly. Suppliers cannot sell identifiable usage data without your say-so. As surveillance devices go, it is a poor one.
£0
what a smart meter should ever cost you
30 min
reading frequency that unlocks EV tariffs
SMETS2
the current standard; switches suppliers
Not sure what you’re dealing with?
Display blank, readings gone back to estimates, or a prepay question you cannot get a straight answer to? Answer a few questions and Tickover will tell you the likely cause and whether the fix is yours or your supplier’s.
Quick answers
Do I have to pay for a smart meter?
No. Smart meters are free from your energy supplier, fitted by their engineer, and that is the only route to getting one. Nobody legitimate sells them door to door or over the phone. If you are ever quoted a price for the meter or its installation, decline and book directly with your supplier instead.
Why has my smart meter stopped sending readings?
Usually one of two things. If your bills still show actual readings, only the in-home display has lost its connection: charge it, restart it next to the electricity meter, and ask your supplier to re-pair it. If bills have gone back to estimates, the meter itself needs attention from the supplier, and older first-generation meters may be waiting for migration onto the national network.
Do I need a smart meter for solar panels?
For export payments, yes. The Smart Export Guarantee, the scheme under which suppliers pay for electricity you send to the grid at the time of writing, needs half-hourly export readings that only a smart meter provides. Panels generate happily without one, but you give the exported units away for nothing.
Will a smart meter itself lower my bills?
Not on its own; it measures rather than saves. The savings come from what the display makes visible, from the end of estimated billing, and from time-of-use tariffs that need half-hourly readings to exist. Since the meter costs nothing, that trade is about as one-sided as home upgrades get.
This guide is general information for UK homes, not advice about your specific property. Anything involving gas must be done by a Gas Safe registered engineer, and notifiable electrical work by a qualified electrician. If you smell gas, call the National Gas Emergency line on 0800 111 999. If you’re ever unsure, stop and get a professional in — that’s exactly what Tickover is for.
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