We use cookies to allow us and selected partners to improve your experience and our advertising. By continuing to browse you consent to our use of cookies. You can understand more and change your cookies preferences here.

Coronavirus Read our latest advice
Reviews based on facts
Our rigorous tests find the facts, and our impartial reviews tell you the truth about how products perform. First month £5, then £9.99 per month, cancel anytime.
Try Which?
19 October 2020

Smart meter roll-out

What's the latest on the smart-meter switchover and how does it affect you? Is it delayed? When will you get a smart meter? We answer your questions about the smart meter roll-out.
Smart meter in home 479610
SI
Sarah Ingrams

Energy companies are in the process of replacing all old-style gas and electricity meters with smart meters. 

Smart meters measure your exact gas and electricity use and then send the information back to your energy supplier, without the need for someone to come and take your meter readings.

But the purpose of the smart meter roll-out is far broader. They’re part of the wider ‘smart grid’ planned by the government, intended to be cheaper and more efficient, and incorporate smart home products, electric cars and more.

More than 20m smart meters have been installed in homes so far. However, they’re not being installed fast enough to fit them in every home by the end of 2020 as originally planned, especially as the coronavirus pandemic has caused further delays. 

The government has therefore extended the deadline. Suppliers now have until mid-2021 to take 'all reasonable steps' to install them in homes and small businesses, with a final deadline of mid-2025 to install them in all homes and in businesses of all sizes. 

Read on to find out why smart meters are being rolled out and why there have been delays so far, or jump ahead to find out about the smart future.

Smart meter roll-out: the story so far

The official national smart meter roll-out began in 2016 and was originally planned to finish in 2020. However, suppliers have now been given extra time to keep installing meters.

The roll-out start date was pushed back multiple times, and there have been delays with many parts of the roll-out since.

Completing the national roll-out is an enormous logistical and technical challenge for the energy industry, involving visits to around 30m homes and small businesses, and installing about 53m new meters.

As of June 2020, energy suppliers had fitted more than 20m smart meters in homes in Britain. Installations were halted at the start of lockdown but have since started up again.

Smart meters installed by large energy companies

The large energy firms need to install more than 46m meters in people's homes in total. Government figures reveal that the number of smart meters installed in 2019 was nearly 500,000 lower than the previous year, and the first quarter of 2020 saw just under 1 million smart meter installations for the first time since 2016.

Just under 135,000 were installed in the second quarter of 2020 as a result of the pause in installations during the pandemic. 

What do smart meters do?

If you don’t already have smart meters, your energy company will contact you to arrange to install them, or you can request an appointment from your energy company.

Once fitted, smart meters will send information about your energy use to a central  body called the Data and Communications Company (DCC). The DCC's wireless network links each home's smart meter with their energy supplier, network operators and energy-service companies. Find out more about how smart meters work.

First and second-generation smart meters

There are two types of smart meter: first and second-generation. You might also hear these referred to as SMETS1 and SMETS2. SMETS stands for Smart Metering Equipment Technical Specification.

Most of the smart meters fitted so far are first-generation smart meters. 

First-generation meters weren't fully compatible with the wireless network when they were installed. Switching supplier when you have one can cause it to revert to being a ‘dumb’ meter, and you’ll have to submit meter readings again. Find out more and what you can do in smart meter problems and how to solve them.

Second-generation meters are connected to the DCC’s wireless network when they’re installed, and so don’t have this problem.

So far, most smart meters installed are first-generation ones. 

All suppliers should now be installing second-generation smart meters. However, even though the end date for first-generation meters to stop being installed has long passed, there’s no guarantee that energy providers have stopped installing them. To be sure, check with your supplier before you agree to have a smart meter fitted.

Since 15 March 2019, any first-generation meters installed have not counted towards energy suppliers' targets. The second-generation smart meters will form the bulk of the smart meter roll-out.

By the end of 2021, energy companies are meant to either enrol 'dumb' first-generation smart meters on to the DCC network, or replace them with second-generation smart meters. 

A smart future

Smart meters could bring huge potential for you, your energy company, and the wider energy system.

For you, a smart meter is the means to get in-depth information about your energy use – for example, how much you’re spending on running your flatscreen TV. Studies are being done into how smart meters could alert you if elderly relatives are showing signs of dementia (by revealing unusual patterns in eating and sleeping shown by electricity use), or dangerously underheating their homes in winter.

You should be able to switch suppliers much more quickly in future, for example via an app. Plus you could trade energy with your neighbours or sell surplus electricity you’ve generated from solar panels.

Find out more about the Smart Export Guarantee, which pays households that put renewable electricity into the grid.

Your energy company will get automatic meter readings, up to every half hour, so it can offer you tariffs tailored to when you use energy – potentially saving you money. Smart time-of-use tariffs are already available from some companies, and offer cheaper rates for electricity at certain (less popular) times of day.

There are community energy schemes taking advantage of this, such as Energy Local. This matches local renewable generation with users nearby in real time, so they only pay for electricity used on top of what their local generator produced.

The nationwide installation of smart meters is a key part of the shift from standard, passive electricity grids to 'smart grids'. These use digital technology, so network operators can predict much more accurately how much electricity is needed by the country, and when, so they can better match supply with demand.

Smart appliances connected to the grid in future could be used to help manage surges in demand (for example, millions boiling the kettle at half time during the FA cup final) by switching off momentarily, and electric cars could be used as batteries to store excess-generated electricity. Network operators will have detailed information on power cuts so they can better manage them.

The more of us who have smart meters, the greater the benefits, according to Ofgem. The government says the smart network benefits ‘depend on a critical mass of SMETS2 meters being installed’.

You can object to having a smart meter installed if you really don't want one. Find out more in our guide to smart meter essentials.