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14 May 2026

TNUoS charges for BESS in 2026/27: the locational signal is getting louder

TNUoS charges for BESS in 2026/27: the locational signal is getting louder

Transmission Network Use of System (TNUoS) charges pay for the operation of the transmission network in Great Britain. The National Energy System Operator (NESO) collects them. TNUoS charges totalled £7.6bn in 2026/27, up 50% from 2025/26. The driver is RIIO-ET3, the new transmission price control that started in April 2026.

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