Spain’s transmission grid has faced a turbulent year. The year began with the Almaraz II nuclear trip in January 2025, followed by the peninsula-wide blackout in April, and renewed “voltage surges” by the end of September. In this context, a new reactive power and voltage control market will take centre stage.

Spain’s upcoming voltage control market: What it means for BESS

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.

1 day 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...

1 day 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...

1 day 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).

​Spain’s upcoming voltage control market: What it means for BESS

​Spain’s upcoming voltage control market: What it means for BESS

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

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

Ko MCP

Forecast methodology in Ko

Products:

Recurring Workflows:

Solutions:

By Team:

By Company:

Resources:

Company:

Spain’s upcoming voltage control market: What it means for BESS

Spain’s upcoming voltage control market: What it means for BESS