--- title: "RTS meter: what it is and what to do" description: "RTS meter: understand what it is, why it's being phased out from 30 June 2025, and what steps you need to take for a free smart meter upgrade." url: "https://www.fuseenergy.com/blog/rts-meter" updated: "2026-10-08" --- # RTS meter: what it is and what to do RTS meters are a legacy electricity meter type in the UK that use longwave radio signals to switch between peak and off-peak electricity rates. The industry-wide phase-out of the Radio Teleswitch Service (RTS) began on 30 June 2025, meaning these meters are being retired. If you have an RTS meter, your current energy supplier must replace it with a smart meter, and this upgrade is provided free of charge. This guide explains what an RTS meter is, why it is being removed, and what steps you need to take to ensure your energy supply and billing remain accurate during this transition. If you have an RTS meter, your current supplier will replace it with a smart meter. Once that is done, you can switch to Fuse Energy for a modern energy experience. Click [here](https://www.fuseenergy.com/app/boarding/premises) to get started. ## What is an RTS meter? An RTS meter is a type of electricity meter that relies on longwave radio signals to manage different electricity tariffs, typically for peak and off-peak periods. These meters were introduced in the 1980s to automatically switch between cheaper off-peak rates - often for electric storage heaters or hot water systems that charge overnight - and more expensive peak rates. This system helped balance the load on the National Grid by encouraging electricity usage during quieter times. ### How radio teleswitching works RTS operates by receiving signals from a central transmitter. These signals instruct the meter to switch between different registers. For instance, during off-peak hours, the meter records consumption on a cheaper tariff register, then switches to a more expensive one during peak hours. This technology allowed energy suppliers to offer tariffs like Economy 7 or Economy 10, which provided cheaper electricity at specific times of the day. ### Identifying your RTS meter Identifying an RTS meter can sometimes be tricky, as they come in various shapes and sizes. However, there are common indicators to look for. You might see a label or display mentioning "RTS", "Radio Teleswitch", or "Economy 7". These meters often appear as older, larger electricity meters, sometimes with a small aerial or a visible clock mechanism. You might also have a separate switch box near your main electricity meter labelled "radio teleswitch" or "RTS". This separate box is often black. If you are unsure, check your electricity bill or contact your current energy supplier, who can confirm your meter type. ## Why is the radio teleswitch service being switched off? RTS is being switched off because it is an outdated technology that has reached the end of its operational life. The supporting infrastructure for the radio signal is no longer viable. ### The end of legacy technology Introduced in the 1980s, the RTS system relies on infrastructure that is becoming increasingly expensive to maintain. It is not compatible with the demands of a modern, smart energy grid. The industry-wide RTS shutdown is a crucial step towards a more efficient and flexible energy system. ### Benefits of modern smart meters Replacing RTS meters with smart meters offers several advantages. Smart meters provide automated readings, which helps ensure accurate billing and eliminates the need for manual meter readings. They also enable access to a wider range of modern, flexible tariffs that can help you manage your energy usage more effectively. ## When is the RTS switch-off date? The industry-wide phase-out of RTS began on 30 June 2025. This marks the start of a managed approach to switching off the RTS signal. ### Ofgem's phase-out timeline Ofgem, the UK's energy regulator, is overseeing this industry-wide phase-out. Energy suppliers are working together to replace RTS meters. This managed transition allows suppliers to address any issues that may arise. ### What this means for your supply If you have an RTS meter, your energy supplier should have contacted you to arrange an appointment to upgrade your electricity meter. It is crucial to respond to these communications as soon as possible to avoid potential disruption to your heating and hot water supply. Your current supplier is responsible for upgrading legacy teleswitch meters to ensure a suitable alternative metering system is installed. ## What you need to do about your RTS meter If you have an RTS meter, the most important step is to arrange its replacement. Your current energy supplier is responsible for this process. ### Contacting your current supplier Your energy supplier will contact you if you have an RTS meter to arrange the installation of a new meter. If they have already contacted you, it is important to take action and book the installation. If you have not heard from them or are unsure, contact your current energy supplier directly to schedule your smart meter upgrade. They are responsible for arranging a meter replacement for RTS customers. ### The free smart meter upgrade process The replacement of an RTS meter with a smart meter is a free upgrade provided by your current energy supplier. You will not have to pay your supplier to install a new meter. This ensures that all customers can transition to modern metering without financial burden. > **Is the RTS meter replacement free?** > > Yes, the replacement of your RTS meter with a smart meter is a free upgrade. Your current energy supplier is responsible for providing this upgrade at no cost to you, ensuring a smooth transition to modern metering technology. ## What happens if you do not replace your RTS meter? Ignoring warnings about the RTS switch-off can lead to significant problems with your energy supply and billing. ### Impact on multi-rate tariffs If your RTS meter is not replaced before the signal is switched off in your area, you may lose the benefits of multi-rate tariffs like Economy 7 or Economy 10. The meter might stop functioning properly, meaning it can no longer switch between peak and off-peak rates. This could result in your heating and hot water systems remaining constantly on or off, or charging at the wrong times of day. After the smart meter installation, you will be able to access a wider range of tariffs. ### Risk of estimated billing Without the RTS signal, your supplier may not be able to accurately determine when you used your electricity. This could lead to estimated energy bills, which might not reflect your actual consumption and could result in higher costs. Estimated bills can also make it difficult to manage your energy budget effectively. ## Moving forward with a smart meter Once your RTS meter has been replaced with a smart meter, you will gain access to a range of benefits and more control over your energy usage. ### Advantages of smart metering Smart meters offer accurate, real-time data on your energy consumption, allowing you to see how much electricity you are using and when. This information can empower you to make informed decisions about your energy habits and potentially reduce your bills. They also enable more flexible and dynamic tariffs, moving away from the "use less" mindset towards optimising usage when energy is abundant. ### Choosing a modern energy supplier Once your current supplier has upgraded your RTS meter to a smart meter, you will be ready to explore modern energy solutions. Fuse Energy offers a digital-first app that provides clear usage data, greater control over your energy, and 24/7 human customer support. While Fuse Energy does not install or upgrade RTS meters - this essential replacement is handled by your current energy supplier - we are here to provide a superior energy experience once your smart meter is in place. Managing your energy bills should be clear and easy to understand. Fuse Energy focuses on straightforward pricing, so you can see exactly what you are paying without unnecessary complexity. If you have a smart meter, you can view detailed usage data through the app or website, helping you understand how you can lower your bills. Our 24/7 human support team is always on hand with fast response times whenever you need help. Click [here](https://www.fuseenergy.com/app/boarding/premises) to switch to Fuse Energy today. Find out about our mission by clicking [here](https://www.fuseenergy.com/mission). --- Rates, availability, and regional off-peak windows change. Check the source page for current terms. **Disclaimer** For the avoidance of doubt, this article is provided for informational purposes only and is not intended to constitute legal or financial advice. The author and/or Fuse Energy shall not be responsible for any losses arising out of any reliance on the information contained herein.