The Commission for Regulation of Utilities (“CRU“) is consulting until 13 May 2026 on a minded-to interim decision that energy storage units (“ESUs”) should pay Generator Transmission Use of System (“G-TUoS”) charges and not Demand Transmission Use of System (“D-TUoS”) charges. The proposal is available here: Transmission Network Charges for Energy Storage – Minded-to Interim Decision.
The CRU notes that storage, which has typically provided system services, can now participate in the wholesale energy markets, storing energy when it is abundant for later export when availability falls. This evolving role means it is increasingly useful for storage assets to have higher Maximum Import Capacity at their connection point to the grid (more symmetric to their Maximum Export Capacity), leaving them better placed to respond to price signals and to reduce curtailment over short windows of time. The CRU also notes that, unlike G-TUoS, D-TUoS includes volumetric elements which may reduce
