Battery energy storage systems in Great Britain earned £55k/MW/year in July 2025, a 27% reduction from June. This marks the lowest revenue level since November 2024, as lower wind and solar generation squeezed wholesale price spreads.

For subscribers to Modo Energy’s Research, this article will also cover:

• A breakdown of the change in revenues from each service
• Why low wind and solar output suppressed price volatility
• An overview of dispatch competitiveness in the Balancing Mechanism
• A data download of all charts

Battery revenues fell by 27% as trading opportunities reduced

Battery revenues saw a £21k/MW/year reduction from June. This is the steepest decline in 2025 and the lowest revenues since November 2024.