Updated on 10/11/25 by Ben_OVO
The SMETS1 smart meter enrolment process - your guide
If you had a first-generation smart meter installed (this was usually before 2019), you might be aware of previous issues when it came to switching suppliers, as not all suppliers could communicate with all smart meters.
In order to rectify this a national remote upgrade took place to make sure all SMETS1 meters will be able to communicate your smart meter usage data to all energy suppliers, much like SMETS 2 meters.
This process is known as ‘Enrollment and Adoption’ (E&A) and is managed by the Data Communications Company (DCC).
Why did smart meters need to be updated?
To get the full benefits of smart meters, the government decided there should be one unified smart meter data network. This makes smart meters work more effectively with all energy suppliers, improving the efficiency of the grid and helping us all to cut carbon emissions.
How did the update happen?
Your smart meter was updated wirelessly, so you don’t need a visit from an engineer – and there won’t be any disruption to your energy supply.
When was my meter enrolled?
This table shows the previous time frames depending on the Meter Manufacturer.
| Meter Manufacturer | MSN format | Fuel | Expected migration to Smart |
| Secure | YYP | Electric | 2022 |
| G4P | Gas | ||
| Elster | YYK | Electric | 2022 |
| G4K | Gas | ||
| Aclara | YYM | Electric | 2022 |
| G4F | Gas | ||
| Itron | YYS | Electric | 2022 |
| G4 | Gas | ||
| L+G | YYL | Electric | 2022 |
| ZYYQ | |||
| ZYYN | |||
| E6S | Gas |
How can I easily identify if the meter is Secure?
Secure Electric Meter Serial Numbers will start with XXP (eg 18P) and Gas Meter Serial Numbers will start with G4P. You can find the Meter Serial number on the front of your meters.
Could a S1 Secure meter go through E&A with no signal?
The short answer to this is no. A S1 Secure meter must be in communication with us in order for OVO to migrate the meter. Check to see if your meter has WAN here.
Would I have received an email when my meter is being upgraded?
The Data Communications Company (DCC) updated SMETS1 meters in batches, and we sent emails or letters to let you know. This included a data protection statement for obtaining and using your meter readings.
Could all meters go through E&A?
There were some meters that couldn’t go through E&A and needed replacing, such as older EDMI meters.
Was the update optional?
This update wasn’t optional because all SMETS1 meters needed to be updated and connected to the Data Communications Company (DCC) by September 2022. It was a government initiative so everyone had to do it – not just OVO customers.
How can I check if my meter has been updated?
You can check whether your meter has completed the enrolment process using this online tool.
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