Monitor and Save Energy

Navigating Smart Meter Standards in the UK: SMETS1 vs. SMETS2

Smart meters have become a central component of the modern energy landscape, providing consumers with real-time data and more control over their energy consumption. In the United Kingdom, various smart meter standards (all run by DCC) have emerged to allow interoperability and ensure a seamless transition to a more energy-efficient future. In this article, we’ll delve into the different standards and how they are shaping the way we manage and consume energy.

A Smart Meter Example
An example smart meter in England

Understanding Smart Meters

Smart meters are devices that measure electricity and gas consumption and transmit this data to energy suppliers, also unlike traditional meters, they offer real-time information on energy usage, enabling consumers to make informed decisions about their consumption patterns. They also eliminate the need for manual meter readings and help suppliers monitor energy demand more accurately.

Want to take advantage of your Smart Meter?

If you have a smart meter in the UK, be sure to check out our guide on setting up your “SMETS” meter in Home Assistant, and if you’re already saving energy, how to save money.

Types of Smart Meter Standards

In the UK, two primary meter standards are in use:

SMETS1 (Smart Metering Equipment Technical Specification 1)

SMETS1 was the initial standard for meters deployed in the UK. These meters use various communication methods, including SMS and mobile networks, to transmit data to energy suppliers. However, a drawback of SMETS1 is that the meters might lose their smart functionality when consumers switch suppliers. This issue led to the development of the updated SMETS2 standard.

SMETS2 (Smart Metering Equipment Technical Specification 2)

SMETS2 is the current and most advanced standard for smart meters in the UK. These meters offer improved interoperability, ensuring that their smart features remain active regardless of the energy supplier. SMETS2 meters use a consistent communication protocol called the Data Communications Company (DCC) network. This network connects all smart meters and ensures seamless data transmission between consumers, suppliers, and network operators.

Benefits of Different Standards

Each meter standard comes with its own set of benefits:

Benefits of SMETS1:

  • Early Introduction: SMETS1 meters were the first to be deployed, paving the way for smart meter adoption, although this impacted future compatibility.
  • Basic Functionality: SMETS1 meters still offer real-time energy data and remote readings.

Benefits of SMETS2:

  • Interoperability: SMETS2 meters ensure continued smart functionality even when switching suppliers.
  • Standardized Communication: The DCC network used by SMETS2 meters provides a consistent and secure data transmission method.
  • Future Compatibility: SMETS2 meters accommodate future energy innovations and technologies.

Transitioning to SMETS2 Smart Meter

The UK is actively working to transition from SMETS1 to the SMETS2 standard and suppliers are replacing SMETS1 meters with SMETS2 meters to enhance interoperability, providing consumers with a more consistent experience. The goal is to create a unified and efficient smart energy ecosystem that benefits both consumers and the energy sector.


Smart meters are transforming the way we manage energy, offering real-time insights and control over consumption. Understanding the different standards in the UK, namely SMETS1 and SMETS2, is essential for consumers and suppliers alike. As the country moves towards the widespread adoption of SMETS2 meters, the energy landscape is set to become more interconnected, efficient, and responsive to consumer needs.

For more insights into the world of energy management and automation, explore our other articles on integrating with your SMETS meter your Home Assistant installation and why you should start monitoring your energy with Home Assistant.

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