Energies
Smart Meters Guide UK — What You Need to Know
Complete guide to smart meters in the UK. How they work, benefits and concerns, how to get one, and whether you should accept a smart meter.
Smart meters are becoming the standard. Here’s everything you need to know.
What Is a Smart Meter?
How It Works
| Feature |
Details |
| Measures usage |
Like normal meter |
| Sends readings |
Automatically to supplier |
| In-home display (IHD) |
Shows real-time usage |
| No estimates |
Bills always accurate |
| Two-way communication |
Can receive tariff updates |
Components
| Part |
Purpose |
| Smart electricity meter |
Measures electric use |
| Smart gas meter |
Measures gas use |
| Communications hub |
Sends data securely |
| In-home display |
Shows usage and costs |
Benefits of Smart Meters
For You
| Benefit |
Details |
| Accurate bills |
No more estimates |
| See real-time usage |
On IHD |
| No meter readings |
Happen automatically |
| Better budgeting |
Know costs as you go |
| Time-of-use tariffs |
Access cheaper rates |
In-Home Display Shows
| Information |
Benefit |
| Current energy use |
See what’s on now |
| Cost so far today |
Track daily spending |
| Historical data |
Compare usage patterns |
| Gas and electricity |
Both fuels |
| Running costs |
See expensive appliances |
Tariff Opportunities
| Tariff Type |
Benefit |
| Time-of-use |
Cheaper rates at certain times |
| EV tariffs |
Very cheap overnight charging |
| Export tariffs |
Get paid for solar export |
| Agile tariffs |
Variable pricing by half-hour |
Types of Smart Meter
SMETS1 vs SMETS2
| Feature |
SMETS1 |
SMETS2 |
| When installed |
2013-2018 |
2019 onwards |
| If you switch supplier |
May lose smart function |
Keeps smart function |
| Network |
Supplier-specific |
National network (DCC) |
| Recommendation |
Ask for upgrade if you have one |
Current standard |
Checking What You Have
| Indicator |
SMETS1 |
SMETS2 |
| Installation date |
Before 2019 |
2019 onwards |
| Lost smart when switching |
Yes |
No |
| Ask supplier |
They can confirm |
They can confirm |
Getting a Smart Meter
How to Request
| Step |
Action |
| 1 |
Contact your energy supplier |
| 2 |
Request smart meter installation |
| 3 |
Book appointment |
| 4 |
Installation takes 1-2 hours |
| 5 |
Engineer shows you IHD |
What to Expect
| Stage |
Details |
| Appointment |
Engineer visits your home |
| Power off |
Brief interruption during swap |
| Duration |
1-2 hours typically |
| Cost |
Free from your supplier |
| IHD setup |
Engineer sets up and explains |
Eligibility
| Situation |
Can Get Smart Meter? |
| Standard home |
Yes |
| Rented property |
Yes |
| Flats |
Usually yes |
| Old wiring |
May need upgrade first |
| Prepayment |
Yes (smart prepay) |
Concerns and Answers
Common Worries
| Concern |
Reality |
| Data privacy |
Data protected, opt out of half-hourly sharing |
| Health (EMF) |
Emit less than mobile phones, same as WiFi |
| Switching problems |
SMETS2 works with all suppliers |
| Meter accuracy |
Regulated and tested |
| Forced installation |
You can refuse |
Data and Privacy
| Data Type |
Who Sees It |
| Daily readings |
Supplier (for billing) |
| Half-hourly readings |
Optional — you choose |
| Real-time on IHD |
Only you |
| Sharing with third parties |
Only with your consent |
If You Have Problems
| Issue |
Solution |
| IHD not working |
Contact supplier for replacement |
| Meter not sending |
Engineer visit may be needed |
| Lost smart function |
Request upgrade to SMETS2 |
| Readings seem wrong |
Contact supplier to investigate |
Smart Prepayment
How It Works
| Feature |
Details |
| Same smart meter |
But in prepayment mode |
| Top up remotely |
App, online, phone |
| No shop visits |
Unless you prefer |
| See balance |
On IHD and app |
| Emergency credit |
Still available |
Benefits Over Traditional Prepay
| Smart Prepay |
Traditional Key/Card |
| Top up from home |
Go to shop |
| See balance easily |
Check meter |
| Better tariff access |
Limited deals |
| Switch suppliers easily |
Harder to switch |
Using Your Smart Meter
Making the Most of IHD
| Feature |
How to Use |
| Daily budget |
Set target and track |
| Appliance detective |
Turn things on, see impact |
| Spot waste |
Find always-on drains |
| Compare days |
See pattern differences |
Saving Money
| Strategy |
How |
| Watch the display |
Notice what uses most |
| Time heavy usage |
Use cheaper rate periods |
| Spot standby drain |
Turn things off properly |
| Track heating cost |
Know your daily heating spend |
| Set budget alerts |
Some IHDs allow this |
Time-of-Use Tariffs
| Tariff Type |
How It Works |
| Economy 7 |
Cheaper overnight (7 hours) |
| EV tariffs |
Very cheap 00:00-05:00 |
| Agile tariffs |
Price changes every 30 mins |
| Best for |
EV owners, storage heaters, flexible users |
Summary: Smart Meter Checklist
Before Installation
| Consider |
Notes |
| Your meter type |
SMETS2 is current standard |
| Rental? |
Can request — landlord can’t refuse |
| Old wiring? |
May need update |
| Prepayment? |
Smart prepay available |
During Installation
| Expect |
Details |
| 1-2 hour appointment |
Engineer in home |
| Brief power cut |
During meter swap |
| IHD demonstration |
How to use display |
| Free |
No charge from supplier |
After Installation
| Action |
Benefit |
| Learn your IHD |
Understand the display |
| Check readings work |
Confirmed on account |
| Consider time-of-use tariff |
If lifestyle suits |
| Watch and learn |
See what uses energy |
Key Points
| Point |
Details |
| Not compulsory |
You can refuse |
| No direct savings |
Helps you change behaviour |
| SMETS2 best |
Works with all suppliers |
| Privacy protected |
You control data sharing |
Smart meters don’t automatically save money, but they give you the information to take control of your energy use. For most households, they’re a sensible upgrade — especially if you want access to time-of-use tariffs or just accurate bills.