RTS meter: what it is and why it's ending

The Radio Teleswitch Service (RTS) switch-off is an industry-wide change affecting many UK homes, particularly those with multi-rate tariffs like Economy 7. This guide explains what an RTS meter is, why the service is ending, and the steps you need to take to ensure your energy supply and billing remain accurate.

If you're looking to modernise your home's energy setup after upgrading from an RTS meter, Fuse Energy offers transparent pricing and a digital-first experience. Click here to see how easy it is to switch.

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 teleswitch service meters work

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 explained or Economy 10, which provided cheaper electricity at specific times of the day.

Identifying an RTS meter

Identifying an RTS meter can sometimes be tricky, as they come in various shapes and sizes. However, there are a few common indicators:

• Multiple displays: Many RTS meters have two or more sets of numbers or displays, corresponding to different tariff rates (e.g., 'Rate 1' and 'Rate 2').
• "RTS" or "teleswitch" label: Some meters may have "RTS" or "Teleswitch" printed on the front.
• Time switch: Older meters might have a built-in mechanical time switch that clicks audibly when it changes rates.
• No smart meter features: If your meter doesn't have a digital display that shows real-time energy usage, or if you've never been offered a smart meter upgrade, it's likely an older type, potentially an RTS meter.

If you're unsure, the best way to confirm is to check your electricity bill, which should specify your meter type, or contact your current energy supplier. You can also learn more about understanding your energy bill to help identify details about your supply.

Why is the RTS service being switched off?

RTS relies on outdated technology that is no longer sustainable or efficient. The infrastructure is ageing, and maintaining it is becoming increasingly difficult. This industry-wide phase-out is part of a broader effort to modernise the UK's energy grid and transition all homes to smart meters.

The RTS signal is being switched off in an industry-wide phase-out that began on 30 June 2025. This means that RTS meters can no longer receive the signals needed to switch between peak and off-peak rates.

What happens if you have an RTS meter?

If you have an RTS meter, your current energy supplier is responsible for replacing it with a modern smart meter, free of charge. They should have contacted you, or will do so, to arrange this upgrade. It's crucial to get your meter upgraded to avoid potential issues with your energy supply and billing.

The benefits of upgrading to a smart meter

Upgrading from an RTS meter to a smart meter offers several advantages:

• Accurate billing: Smart meters send automatic readings to your supplier, ensuring you only pay for the energy you use, eliminating estimated bills.
• Access to modern tariffs: With a smart meter, you can access a wider range of innovative tariffs, including time-of-use tariffs that reward you for using electricity during off-peak hours, often with more flexibility than older Economy 7 plans.
• Better energy management: Smart meters come with an in-home display (IHD) that shows your energy usage in near real-time, helping you understand and control your consumption.
• No more manual readings: You won't need to submit meter readings manually, saving you time and effort.

What if you don't upgrade your RTS meter?

If your RTS meter is not replaced, it will no longer receive the signals to switch between peak and off-peak rates. This can lead to several problems:

• Loss of multi-rate functionality: Your meter may become stuck on a single rate, potentially the more expensive peak rate, meaning you could be overcharged for your electricity.
• Inaccurate or estimated bills: Without the correct signals, your supplier may struggle to bill you accurately, leading to estimated bills that don't reflect your actual usage.
• Higher energy costs: Being stuck on a higher rate or receiving inaccurate bills could result in you paying more for your energy than necessary.

It is in your best interest to arrange a smart meter upgrade with your current supplier as soon as possible.

How to upgrade your RTS meter

The process for upgrading your RTS meter is straightforward:

1. Contact your current energy supplier: They are obligated to replace your RTS meter. Get in touch with them to arrange an appointment.
2. Schedule the installation: Your supplier will book a date for a qualified engineer to visit your home and install the new smart meter. You can find more information about smart meter installation on our blog.
3. Enjoy your new meter: The installation is free, and the engineer will ensure everything is working and answer any questions you may have.

Switching to Fuse Energy after your upgrade

Once your current supplier has replaced your RTS meter with a smart meter, you'll be ready to experience modern energy management. Fuse Energy offers innovative tariffs and a digital-first experience designed to put more power in your hands. With a smart meter, you can unlock the full potential of your energy usage and benefit from transparent, accurate billing.

Managing your energy should be simple and clear. Once your RTS meter is replaced with a smart meter, Fuse Energy can help you make the most of your new technology with straightforward tariffs and real-time usage insights. Our app provides detailed breakdowns of your energy consumption, helping you understand and control your bills. Plus, our 24/7 human support team is always ready to assist. Click here to switch to Fuse Energy today. You can also learn more about our mission to make energy fairer and greener here.