Our model battery (2 MW, 4 MWh, RTE 0.86, DoD 100%) could have generated 76 kPLN in revenue from DA + IDC optimization in October. That’s 22% less than in September, but still aligned with seasonal trends.

📉 The average daily revenue was 2,449 PLN, and the 12-month rolling sum remained stable at 887 kPLN - the third consecutive month without major changes in this indicator. What does it mean? We’re starting to see some seasonal patterns in BESS financial performance.

⚠️ Anomalies on the balancing market

October also brought an exceptional event on the balancing market: during massive RES curtailments (up to 2 GW taken offline), a positive imbalance price of nearly 39,500 PLN/MWh was recorded - this time over two quarter-hours! For batteries offering upward capacity in the aFRR up product, this was a perfect opportunity to secure high earnings - and a strong argument for diversifying revenue strategies beyond DA and IDC.

Tell us what you think!

💬 Do you think October confirms a stabilization trend in BESS revenues? Share your thoughts in the comments!

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October 2025 - stability and signals from the balancing market

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