Energy & Utilities Smart Meters UK — Benefits, Problems + Should You Get One? Everything you need to know about smart meters. How they work, the benefits, common problems, SMETS1 vs SMETS2, and whether you should get one installed.
1 October 2025
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4 min read
Smart meters are the next generation of gas and electricity meters, automatically sending readings to your supplier and showing your energy use in real time. Over 30 million have been installed in UK homes.
What Is a Smart Meter? Component What It Does Smart electricity meter Measures electricity use, sends readings automatically Smart gas meter Measures gas use, sends readings automatically In-Home Display (IHD) Shows real-time and historical usage in £ and kWh Communications hub Connects meter to supplier via secure network
How They Work Feature Detail Readings sent Automatically, typically daily or half-hourly You can still read it Physical display shows usage In-home display Shows costs in near-real-time Network used DCC (Data Communications Company) secure network Data security Encrypted, regulated, you control who sees data
Benefits Benefit Detail Accurate bills No more estimated bills No meter readings No need to submit readings manually Real-time usage information See what you’re spending Better tariffs Access to time-of-use and smart tariffs Easier switching New supplier gets readings automatically Prepayment features Top up remotely, no key/card Remote operations Credit/prepay mode change without visit Help suppliers Grid management (benefits everyone)
Potential Problems Problem Reality Goes “dumb” when switching SMETS2 meters should work across suppliers; SMETS1 may lose smart functions temporarily Connectivity issues Some rural areas have poor signal IHD stops working Can request replacement; meter still works Anxiety from seeing costs Some people find real-time costs stressful Privacy concerns You control data sharing; suppliers use anonymised data Installation disruption Takes 30–60 minutes; supply off briefly Cannot be forced You can refuse
SMETS1 vs SMETS2 Feature SMETS1 SMETS2 Installed 2011–2018 (mostly) 2018–present Switching Often lost smart functions Works across all suppliers Network Supplier’s own network DCC national network IHD Supplier-specific Standardised Current installs No longer installed Standard for new installs
If You Have SMETS1 Situation Outcome Switching supplier May temporarily lose smart functions Meter still works Yes — as a standard meter Upgrading to SMETS2 Supplier can arrange (free) IHD stops showing data Normal; meter readings still sent automatically in background
Smart Tariffs Tariff Type How It Works Best For Time-of-use Different rates at different times Those who can shift usage Agile/variable Half-hourly pricing Very flexible users EV tariff Cheap overnight for EV charging Electric vehicle owners Economy 7/10 Cheap night rate (traditional) Storage heaters, overnight use
Examples of Time Savings Action Standard Tariff Smart/ToU Tariff Running dishwasher at 11pm vs 6pm Same cost Significant saving Charging EV overnight Same cost Much cheaper Doing laundry off-peak Same cost Cheaper
Getting a Smart Meter Step Detail 1 Contact your energy supplier 2 Book installation appointment 3 Engineer installs meter(s) — 30–60 minutes 4 Engineer shows you how to use IHD 5 Start using real-time data
What to Expect on Installation Day What Happens Duration Engineer arrives — Supply turned off briefly 15–30 minutes Old meter removed — New meter installed — Supply restored — IHD set up and explained 5–10 minutes Total time 30–60 minutes
Using Your In-Home Display Feature How to Use Real-time cost See what you’re spending right now (£/hour) Historical data Compare days, weeks, months Budget setting Set daily budget; display warns if exceeded By fuel Switch between gas and electricity views Traffic light system Green/amber/red for usage levels
Tips for Behaviour Change Action Impact Check daily spend each morning Awareness prompts action Identify high-use appliances Turn on one at a time, watch IHD Set a daily budget Challenge to stay within it Compare with yesterday/last week Track improvement
Should You Get a Smart Meter? Get One If Situation Why You forget to submit readings Automatic readings You want real-time usage data IHD visibility You have/want an EV Access to EV tariffs You want smart tariffs Required for time-of-use You are on prepayment Easier top-ups
Consider Waiting If Situation Why Very rural location Connectivity issues possible Planning to switch supplier soon Get settled first SMETS1 concerns If supplier is still installing SMETS1 (rare now)
No Reason to Refuse If Concern Reality Privacy Data is secure; you control sharing Cost It is free; you pay indirectly either way Forced usage reduction Does not control your supply Health concerns Radio emissions lower than mobile phones
For more on managing energy costs, see our reduce energy bills guide and energy price cap explained .