GB BESS revenues fall to £63k/MW/year in July 2026
Revenues in Great Britain fell 10% to £63k/MW/year in July 2026, down from £70k/MW/year in June, though 14% above July 2025's £56k/MW/year. The fall came from the Balancing Mechanism. Wholesale revenues climbed to their highest-ever level, but batteries spent more than ever before buying energy through the Balancing Mechanism.
July was more expensive and flatter than June. Day-ahead prices stayed above £100/MWh in 67% of hours, up from 52% in June, while daily spreads narrowed. Batteries moved their charging into the Balancing Mechanism in response to the consistently high wholesale prices. Bid volumes reached 191 GWh, the highest-ever, while offer volumes fell to 83 GWh, the lowest in twelve months.
For subscribers to Modo Energy's Research, this article will also cover:
- A breakdown of revenue changes across each service
- Why wholesale revenues hit their highest-ever level as Balancing Mechanism revenues reduced
- A breakdown of Balancing Mechanism activity
- Frequency Response revenues
- A data download of all charts
How much are GB batteries actually earning across the revenue stack?
Modo Energy's Benchmarks measure realised BESS revenue in Great Britain and attribute it by service and strategy, across wholesale, the Balancing Mechanism and ancillary services, through the FCA-regulated ME BESS GB index.
Explore the GB benchmark →Wholesale rises, the Balancing Mechanism falls
July's revenue stack was wholesale-export led, as batteries charged up more in the Balancing Mechanism. Wholesale revenues rose to £43k/MW/year, up £14k from June, to their highest level ever.
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