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.

ME BESS GB: Battery revenues hit an 8-month low in July

Sign up for free to read the full article

Ko - the AI analyst for energy professionals

Get answers to your most pressing business-critical questions, across battery revenues, trading strategies, policy outlooks and more.

Regulated benchmarks

The only FCA and IOSCO-authorised performance benchmarks for battery and solar assets - used by leading asset managers globally.

Bankable forecasts

Investment-grade revenue models with transparent methodology - high, central, and low curves to de-risk every business case.

Sign up for free

Trusted by 25,000+ energy professionals • Already a subscriber? Log in

GB BESS revenues fall to £69k/MW/year in April 2026

GB BESS revenues fell 6% to £69k/MW/year in April 2026 as Balancing Mechanism revenues normalised, while record solar drove prices to -£79/MWh.

1 day ago

April 2026 GB Solar Forecast update: Accelerated buildout, lower capture rates

Forecast Updates

5 min

April 2026 GB Solar Forecast update: Accelerated buildout, lower capture rates

GB solar is building faster than the January forecast. But more capacity means more cannibalisation — capture rates fall from 85% in 2026 to 58% by 2035, around 16% below our January release. For an AR6 site commissioning in 2028, that translates to revenues falling from £59k/MWp in year one to £42k/MWp by the end of the CfD term.

2 days ago

1 min

Ko MCP

Ko MCP is now live. Connect Modo Energy's regulated global indices and full research library to Claude, Cursor, or any MCP-compatible tool — and bring our data and analysis directly into the workflow you already use.Generate a TB Spread benchmarking r...

2 days ago

1 min

Forecast methodology in Ko

Ko now knows the methodology behind every Modo Energy forecast — the modelling decisions, assumptions, and judgement calls our power market experts make. Ask any question and get the reasoning behind every number, with citations, in seconds.Ask how th...

2 days ago

Modo Energy (Benchmarking) Ltd. is registered in England and Wales and is authorised and regulated by the Financial Conduct Authority (Firm number 1042606) under Article 34 of the Regulation (EU) 2016/1011/EU) – Benchmarks Regulation (UK BMR).