Battery energy storage systems get skipped in the Balancing Mechanism - a lot! And, at the moment, there’s a big limitation on battery use - dispatches are restricted to just 15 minutes in length.

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CAISO battery fleet crosses 15 GW after record 4.7 GW year

1.24 GW of battery capacity was added to the California grid in the final quarter of 2025, bringing the annual additions to 4.7 GW.

BESS won three of four contracts in GB's first reactive power tender. Germany and Spain are next

Explainers

4 days ago

BESS won three of four contracts in GB's first reactive power tender. Germany and Spain are next

Three European markets are formalising reactive power procurement as synchronous generation retires. GB's LT2029 tender covers 1,450 MVAr across three named zones; Germany's TSOs project a 27,000 MVAr deficit by 2030. Spain, which had no reactive power market until 2025, is launching daily competitive auctions to replace a mandatory CCGT obligation that was costing consumers €176m a year.

Poland's BESS investment case is shifting from capacity-backed to merchant-led

Explainers

4 days ago

Poland's BESS investment case is shifting from capacity-backed to merchant-led

Poland's capacity market paid batteries generously for three years. That era is over. Yet the December 2025 auction still cleared 5.1 GW of new BESS, the largest year on record. The merchant revenue stack, built on day-ahead arbitrage and ancillary services, is strong enough on its own.

Trading caps: How to balance risk and return for BESS in the NEM

Research and Analysis

4 days ago

Trading caps: How to balance risk and return for BESS in the NEM

Selling 60–75% of a four-hour battery's capacity as caps has historically optimised the trade-off between return and revenue volatility across the NEM.

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).