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Making first generation meters smarter

Migrating first generation meters

DCC are working closely with customers to migrate more than 16 million first generation meters onto our network. When complete, many more consumers will enjoy the full benefit of their smart meter.

Programme overview

First generation meters explained


What are first generation meters?

First generation smart meters, also known as SMETS1, which have been installed for years, don't always allow the consumer to change energy supplier without losing the ability to send readings automatically. Second generation, or SMETS2, meters began being installed in 2018 and allow the consumer to switch seamlessly between energy suppliers as they are connected to a nation-wide secure smart meter network. The government has put in place a programme to move first-generation meters onto this network, giving old meters the same benefits as new meters.

Woman checking smart meter


Benefitting Britain

Enrolling these meters will enable interoperability as consumers switch between energy suppliers, improve security and save industry many millions of pounds a year. The programme is underway with the first group of meters migrated in 2019.

Is your meter smart?

Check what type of smart meter you have and if it's working in smart mode. We have worked with Citizens Advice to provide a tool that allows you to check if your smart meter has been migrated onto our network.

Check your meter
Smart meter

Find out more

Frequently Asked Questions

Why are first generation smart meters being updated?

To realise the full benefits of smart metering, the Government decided that along with a new unified network and single smart meter standard, all older smart meters should be migrated to this singular network rather than remaining on various unconnected networks. This will allow seamless energy supplier switching and smart operation no matter what smart meter generation you have or who originally installed it.


The DCC was given the role by the Government of coordinating the ‘migrating’ of these meters onto the nationwide network. This has required working across the energy industry to make sure suppliers can bring their customers onto our network in a secure and seamless manner.

What will change with my smart meter?

Its operation will only be improved. The display will continue to operate, and other functions like topping-up, if it’s a prepayment meter, will remain the same. The big difference will be its ability to securely and automatically send meter reads, no matter which supplier you are currently on, or plan to switch to.

When will my meter be migrated?

Unfortunately, the DCC is unable to provide consumers with exact dates for the migration of their meters. DCC and Energy Suppliers are working together to ensure the SMETS1 Enrolment & Adoption Programme is completed by the end of 2022. If there is a problem with migrating your meters, your energy supplier will arrange for second generation (SMETS2) meters to be installed.

How will you migrate my meter?

Migration will be completed over-the-air (OTA), meaning the new software will be delivered wirelessly without a visit from a technician. It is most likely that you will not be required to do anything, and you may not notice the change happening until your current energy supplier notifies you. There will be no disruption to your energy supply.

Can I request an early migration?

Though we appreciate you would like the added convenience of having your smart meter on our network, we ask everyone to be patient. Meters will be moved gradually over the course of the rollout.

Is this safe?

Yes, it is safe, and you will not lose power.


As these meters are in people’s homes and are so important to daily life, the programme has been designed to be extremely cautious. This means that each meter type will be extensively tested and suppliers have been given advice to ensure there will be no issues with supply or billing.

Is my data safe on your network?

Our network has been built to the highest security standard which has been reviewed by the National Cyber Security Centre. It uses high levels of encryption, and the most important data passes over our network without us having the ability to see it. Only your supplier can see how much energy you are using and when. We can only see all of your data with your explicate approval.

Who is migrating my first generation meter?

For the migration of dormant meters (meters not giving automatic readings) the DCC will play the lead role. For active meters, the consumer’s energy supplier has a key role in supporting the migration, which the DCC will help manage. It will be the energy supplier setting the date, contacting customers if necessary, and ensuring all billings are in order. They will also be accountable for ensuring prepayment customers do not lose supply during the migration. We have advised all suppliers to put measures in, such as temporarily putting the meter in credit mode during migration to ensure supply is not lost.

Will I lose smart functionality if I switch supplier?

If your meters have not been migrated then there is a risk that you will have to provide your energy supplier with meter readings, if they are unable to obtain the information directly from your meters. The DCC and energy suppliers are working together to ensure all eligible meters are migrated by the end of 2021.

What is the difference between first and second generation meters

First generation (SMETS1) meters were installed by energy suppliers to meet their obligations to offer and install smart meters for consumers, before the DCC became operationally ready. Whilst the core functionality offered by a SMETS1 meter is the same as SMETS2, the manner in which information is currently provided to energy suppliers differs, as the communication is managed through different Smart Meter System Operators (SMSOs), where SMETS2 meters communicate through a single service managed by the DCC. Once a SMETS1 meter has been migrated, the communication will operate in the DCC's total systems. This enables consumers to change energy suppliers without loss of smart capabilities.

Will migration change with the way I top up my prepay meter?

The way you top up will remain the same. Your energy supplier will contact you ahead of migration to ensure the process is completed without any disruption.