A smart meter warning has been issued to over 600,000 households and businesses still relying on outdated Radio Teleswitch Service (RTS) meters.
With the system set to shut down permanently on 30 June 2025, those who fail to upgrade risk losing heating, hot water and access to cheaper off-peak rates.
Ofgem, alongside energy suppliers British Gas, EDF, EON, Ovo, and Octopus, is urging customers to act swiftly to avoid disruptions and further challenges, especially as energy price rises continue to strain household budgets.
Outdated meters set to go offline
The RTS system, introduced in the 1980s to manage off-peak energy tariffs like Economy 7, will be permanently switched off on 30 June 2025.
The technology, which uses BBC Radio 4’s longwave signal, has reached the end of its operational life.
Charlotte Friel, Director for Retail Pricing and Systems at Ofgem, highlighted the urgency: “This high-profile campaign aims to enhance the ongoing efforts to reach affected customers and ensure they book their meter upgrade. Failure to act could lead to customers losing control over their heating or hot water, or facing higher bills.”
Ofgem confirmed that all RTS customers should have been contacted by their energy supplier by the end of 2024. The campaign includes TV, radio, and billboard adverts, with TV presenter Lorraine Kelly helping to raise awareness.
Smart meters to replace RTS Technology
Smart meters are being promoted as the primary replacement for RTS meters, offering customers.
Ofgem say that smart meters provide real-time energy data, potentially helping households better manage consumption and access flexible tariffs.
Friel added: “Smart meters can open up a wider range of tariffs and give customers more visibility over their energy use, ultimately helping them save money.”
The government has pledged to ensure a smooth transition, working closely with Ofgem and energy companies.
How to tell if you have a RTS meter
To determine if your electricity meter is a Radio Teleswitch Service (RTS) meter, look for these signs:
- Switch box labelled "Radio Teleswitch": Check near your meter for a device explicitly marked with this label.
- Electric or storage heaters: RTS meters are often paired with these types of heating systems.
- No gas supply: You may have an RTS meter if your area doesn’t have a gas network, such as in rural areas or blocks of flats.
- Time-based energy tariff: If your energy tariff offers cheaper rates at specific times, like Economy 7, Economy 10, or Total Heat Total Control, you might have an RTS meter.
How to avoid scams and prepare early
With the looming deadline, Ofgem warns customers to be cautious of scams.
“Upgrades come at no extra cost,” an Ofgem spokesperson assured. Customers are advised to contact their supplier if they have concerns about their options.
Dhara Vyas, CEO of Energy UK, stated: “Energy suppliers are working closely with Ofgem and consumer groups to ensure a seamless upgrade process. By acting now, customers can avoid disruption and enjoy the benefits of modern energy management.”
Ofgem are warning that those who fail to upgrade to a smart meter upgrade risk network disruptions and increased costs.
