Record Revenues in Early 2026
According to the Clean Horizon Storage Index, Poland has established itself as the most profitable large-scale Battery Energy Storage System (BESS) market in Europe. In May 2026, a model 1 MW / 2-hour BESS system achieved an annualized revenue exceeding 800,000 euros (3.5 million PLN). Revenue is primarily driven by grid ancillary services, including FCR, aFRR, and mFRR, alongside energy arbitrage.
Market Saturation and Future Outlook
The high profitability is largely fueled by severe price volatility in the day-ahead market, exacerbated by rapid solar PV deployment. In August, the average day-ahead price spread reached an impressive 237 euros/MWh. However, this lucrative environment is expected to evolve. The aFRR capacity reservation price, which averaged over 120 euros/MW/h in May, already dropped to around 74 euros/MW/h in June.
Analyses by the Polish Energy Regulatory Office (URE) indicate that approximately 6 GW of new energy storage capacity will enter the system between 2027 and 2029.
This massive influx, with roughly 2 GW expected in 2028 and 4 GW in 2029, will inevitably saturate the market. As battery capacity surges, ancillary service prices are projected to decline significantly. Consequently, developers will need to pivot their business models, shifting focus toward arbitrage and intraday market trading to maintain viable returns in the coming years.
Source: Elektromobilni, Lovev
This article was assisted by AI analysis. Please refer to the original source for official information.