BESS Revenue Compression in FCR — Week 14, 2025

Week 14 was defined by a sharp re-pricing event in the FCR market following the restoration of the NordLink interconnector after maintenance. The sudden return of Norwegian hydro capacity into the German grid triggered a drop in FCR prices from €28/MW to €17/MW within 36 hours.

Intraday spreads in EPEX widened significantly as participants repositioned, creating short-lived but material opportunities in the 15-minute product window.

The price collapse in FCR was sharper than models anticipated, partly because several smaller BESS assets that typically trade aFRR had pre-positioned into FCR for the week. This created an oversupply at exactly the moment structural demand softened.

The move illustrates the compounding effect of correlated hedging strategies across the BESS fleet — a structural vulnerability that will likely repeat as fleet size grows.

For a 10 MW / 10 MWh BESS fully optimised across FCR and intraday: - Expected weekly FCR revenue: €8,500–€12,000 (down from €14,000) - Intraday top-up potential: €2,000–€4,500 if 15-min volatility was captured - Net: broadly flat to prior week if intraday was actively managed

Week 15 is expected to see FCR prices stabilise in the €20–€24 range as the market digests the new interconnector baseline. Watch Wednesday morning EPEX sessions — wind forecast uncertainty in Germany may create short windows above €30.

aFRR remains the structural trade of the quarter. Operators with flexible dispatch should consider increasing allocation.