Battery energy storage systems earned £71k/MW/year in April 2025 - a 10% reduction in revenues from March 2025. Despite this, 2025 revenues remain ahead of 2024 averages. In April, wholesale market intraday spreads held at £79/MWh, but were outweighed by a sharp fall in Balancing Mechanism revenues, reaching their lowest since July 2024. High solar generation, easing demand, and record Bid volumes contributed to revenue opportunities in April.
For subscribers to Modo Energy’s Research, this article will also cover:
- A breakdown of the change in revenues from each service.
- An overview of how solar generation and reduced demand shaped market conditions, price spreads, and dispatches.
- Insights into Quick Reserve dynamics, including site-level impacts and pricing shifts in Positive and Negative services.
- Why the location of Balancing Mechanism Bids shifted in April and by how far.
- A data download from all the charts.
Battery revenues reduced by £8k/MW/year in April 2025
In April 2025, battery energy storage systems in Great Britain earned £71k/MW/year. This was a 10% reduction in revenues from March 2025, but remains above the ME BESS GB Index of £50k/MW/year for all of 2024. So far in 2025, battery energy storage revenues have averaged £79k/MW/year.