How does a smart meter work?

Smart meters automatically send your energy usage data to your supplier, eliminating the need for manual readings and offering a clearer picture of your consumption. This guide explains the technology behind these devices, their practical benefits for managing energy and costs, and addresses common concerns.

Smart meters offer a modern approach to energy management, providing accurate billing and insights into your household's usage. If you're looking to understand your energy consumption better and manage your bills more effectively, switching to a supplier that embraces this technology is a great step.

How does a smart meter work? Here's how that connects to your home supply: With Fuse Energy, you get clear pricing, real-time usage data, 24/7 human customer support, and a modern energy experience designed around you. Signing up takes just a few minutes, so you can take control of your bills from day one. Click here to switch to Fuse Energy today and start saving.

Understanding smart meters: the basics

What is a smart meter?

A smart meter is a next-generation gas or electricity meter that digitally measures your energy consumption and securely sends this data to your energy supplier. Unlike traditional meters that require manual readings, smart meters automate this process, providing more accurate billing and near real-time insights into your energy use. This national rollout is a government-backed programme designed to modernise the energy grid across Great Britain, with a target for all suppliers to offer smart meters to every domestic property by the end of 2030.

Key components of a smart meter system

A typical smart meter system comprises three main elements:

• The smart meter itself: This is the device installed for your electricity and/or gas supply, replacing your old meter. It records your energy usage.
• A communications hub: Often located on top of your electricity meter, this hub acts as the bridge, securely transmitting your energy data.
• An In-Home display (IHD): This small, portable screen shows your energy consumption in near real-time, typically in pounds and pence, helping you monitor your usage.

The technology behind your smart meter

How data is transmitted: the DCC network

Smart meters transmit energy usage data via a secure, dedicated national network managed by the Data Communications Company (DCC). This network is specifically designed for smart meter communications, ensuring the data is protected and reliable. This dedicated infrastructure means your energy usage information is kept separate from your internet traffic and is not reliant on your home broadband connection. The DCC operates the central smart meter communications network in Great Britain, routing data between meters, energy suppliers, and network operators. Smart meters send readings automatically, typically daily, to your energy supplier.

What information your smart meter sends

Your smart meter primarily sends readings of your electricity and gas consumption. This includes:

• Energy usage data: Detailed records of how much electricity (in kilowatt-hours, kWh) and gas (converted to kWh from cubic metres or feet) you are using.
• Meter readings: Automated readings eliminate the need for you to submit them manually, ensuring your bills are based on actual consumption rather than estimates.
• Meter health information: Some meters can send basic diagnostic information, helping your supplier identify potential issues.

The information sent is strictly related to your energy consumption. It does not track your activities within the home or collect personal data unrelated to energy use.

The role of your In-Home display (IHD)

The In-Home Display (IHD) is your window into your energy consumption. It shows near real-time energy usage in pounds and pence, giving you immediate feedback on how much energy you're using. This can be particularly useful for:

• Spotting energy-intensive appliances: You can see the impact of turning on appliances, helping you identify which ones use the most energy.
• Monitoring costs: The IHD translates your usage into monetary terms, making it easier to understand your spending.
• Setting budgets: By observing your consumption patterns, you can make informed decisions to manage your energy use and potentially reduce your bills.

Benefits of having a smart meter

Accurate billing and real-time usage data

One of the most significant advantages of smart meters is accurate billing. Because your meter automatically sends readings to your supplier, your bills are based on precisely how much energy you've used, rather than estimates. This means no more unexpected catch-up bills due to under-estimated usage. The near real-time data from your IHD also empowers you to see your consumption as it happens.

Empowering energy management

Smart meters provide the foundational data necessary for you to gain transparency and control over your energy usage. By understanding when and how you use energy, you can make informed decisions to optimise your consumption. This capability allows you to adjust your habits, use appliances more efficiently, and potentially reduce your energy expenditure. It's about giving you the capability to manage your energy, not just consume it.

Supporting a modern energy grid

The national smart meter rollout is a government-backed programme aimed at modernising the energy grid. Smart meters play a crucial role in creating a more efficient and responsive energy system. The aggregated data helps energy suppliers and network operators better understand demand patterns, which can lead to more efficient energy distribution and the integration of more renewable energy sources.

Addressing common smart meter concerns

Data privacy and security

Concerns about data privacy are understandable. However, smart meters communicate via a secure national network managed by the DCC, not your home's Wi-Fi. This network is encrypted and dedicated solely to smart meter data, providing a high level of security. The data collected is primarily your energy consumption, used for billing and to help you manage your usage. Ofgem, the UK's energy regulator, oversees smart meter operations, ensuring consumer protection and data security standards are met. Energy suppliers need your consent to access and use your data, especially for more detailed usage patterns or marketing purposes.

Smart meters and your bills: saving money

Installing a smart meter does not automatically guarantee lower energy bills. Instead, smart meters provide you with the data and insights needed to make informed choices about your energy consumption. By actively engaging with the information from your IHD and understanding your usage patterns, you can identify opportunities to reduce waste and manage your costs more effectively. The power to play with your energy usage comes from the transparency the meter provides.

What about Radio Teleswitch (RTS) meters?

The legacy Radio Teleswitch Service (RTS) for switching between peak and off-peak rates is being phased out. The phase-out began on 30 June 2025, with the service being switched off for good. If you have an RTS meter, your current energy supplier will need to replace it with a smart meter. RTS meters are unsupported for switching to Fuse Energy. Once your supplier has replaced your RTS meter with a smart meter, you can then switch to Fuse and benefit from modern energy management tools and a digital-first experience.

Getting and using your smart meter

Is there a cost to install a smart meter?

For eligible homes, smart meter upgrades are typically free. Energy suppliers, including Fuse Energy, offer free smart meter upgrades. This means you won't incur any upfront costs for the installation of the new meter.

Making the most of your smart meter data

Once your smart meter is installed, here's how to make the most of the data it provides:

• Monitor your IHD regularly: Check your In-Home Display to understand your near real-time energy usage and identify patterns.
• Identify energy hogs: Notice spikes in usage when certain appliances are turned on. This can help you decide when and how to use them more efficiently.
• Adjust habits: Use the insights to make small changes, such as turning off lights in empty rooms or unplugging devices when not in use.
• Engage with your supplier's tools: Many suppliers offer apps or online portals that provide more detailed breakdowns of your energy consumption, helping you track progress over time. Fuse provides customer support via in-app chat to assist customers in understanding and troubleshooting their smart meters.

By actively using the information from your smart meter, you can take control of your energy consumption and work towards a more efficient and cost-effective home.

Understanding how your smart meter works can help you make smarter energy choices. Fuse Energy offers clear pricing and in-app usage data, making it easier to manage your energy consumption. Switching to Fuse is quick and straightforward, giving you greater control over your household's energy from day one. Click here to switch to Fuse Energy today.