Smart Secure Electricity Systems (SSES) tariff interoperability: code and licence modifications
The Secretary of State has made changes to Electricity Supply Standard Licence Conditions and the Retail Energy Code using his power under section 245(1)(a) and (e) of the Energy Act 2023.
Applies to England, Scotland and Wales
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The Smart Secure Electricity Systems (SSES) Programme is designed to create the technical and regulatory frameworks to unlock the untapped flexibility from small scale devices, such as domestic electric vehicle charge points and heat pumps.
The Tariff Interoperability Arrangements will introduce an obligation on electricity suppliers to make pricing data available in a standardised format. This is an important government-led initiative which will make it easier for electricity customers to participate in consumer-led flexibility by automating how Energy Smart Appliances (ESAs) connect to price signals. This will enable consumers to save money on their electricity bills.
The initial phase of Tariff Interoperability will be delivered by introducing changes to the Electricity Supply Standard Licence Conditions and the Retail Energy Code.
Section 245(1)(a) of the Energy Act 2023 gives the Secretary of State power to make modifications to licences, and section 245(1)(e) provides power to modify the industry codes maintained in accordance with the conditions of these licences for the purposes of facilitating, promoting, ensuring the security of, or otherwise regulating load control.
In accordance with section 246(1) of the Energy Act 2023, we have consulted on Tariff Interoperability proposals in the 2024 Delivering a Smart Secure Electricity System consultation, and most recently conducted the 2025 Tariff Interoperability consultation in collaboration with the Retail Energy Code Company (RECCo). We have now published the government response to the 2025 Tariff Interoperability consultation on the Retail Energy Code website.
Taking responses into account, the Secretary of State has made a modification to the Electricity Supply Standard Licence Conditions and the Retail Energy Code as set out in the Decision Notice. The modification sets out the requirements for how electricity suppliers must share tariff data.
The modifications, as set out in the Decision Notice, will take effect from 18 May 2026.