2-Hour BESS Segment Performance (2 cycles/day)
2025 Performance Data for Germany
Germany — 2 cycles/day (full stack)
A 2-hour virtual BESS using PortfolioEnergy's commercial platform achieved 262 k€/MW/a.
Full-stack co-optimisation across day-ahead, intraday, FCR and aFRR, with the optimiser re-running every 5 seconds. An order-of-magnitude indication of the revenue achievable in the shorter term while ancillary markets remain lucrative.
1Round-trip efficiency of 90%. Computed using Volatile energy market forecasts, PortfolioEnergy ancillary market forecasts, and EPEX order book data. Auctions cleared with settled prices. Intraday continuous trading was simulated by introducing a delay (order book time) between accessing the order book and matching orders.
2LF Energy RTC-Tools, day-ahead price taking. Open-source implementation.
To obtain a backtest with the specifics of a particular asset with the PortfolioEnergy optimiser, please contact us at info@portfolioenergy.com.
Update
Updated 10 June 2026 — results now use Volatile energy market forecasts.
Transparency
Germany has no public BESS performance benchmarks. Australia's NEM is the opposite: the system operator (AEMO) publishes dispatch data for every utility-scale BESS at 5-minute granularity, allowing like-for-like comparison on every dispatch decision. See our 2025 Australian results and NEM comparison dashboard.
Order book scope
The intraday continuous results above use only the German EPEX order book. Cross-border XBID liquidity from neighbouring bidding zones was not included, so live trading outcomes can reasonably be expected to be higher than the figures shown here.
Asset-backed trading
Our benchmark results reflect pure asset-backed trades only — every position is physically backed by the battery's state of charge and operational constraints. No speculative proprietary trading is mixed into these figures. This means the revenues shown are achievable by the asset alone, without taking on unhedged market risk.
High-frequency trading
The results above were produced with the optimiser re-running every 5 seconds. In live operation, revenues can be lifted further by reacting to individual order book updates in real time. This regime is out of scope for backtesting: faithfully simulating a full year of order-book-driven decisions would be computationally prohibitive — in the worst case it would take exactly a year of wall-clock time to replay.
For the most realistic revenue estimate on your particular asset, we recommend a live shadow run: PortfolioEnergy trades a virtual copy of your battery alongside your existing setup, with full real-time order-book reactivity, so you can compare against your incumbent without committing the asset. Get in touch to set one up.
Why PortfolioEnergy Delivers Leading Performance
PortfolioEnergy's optimisation platform combines advanced mathematical optimisation with real-time market intelligence and robust risk management. Our approach delivers strong performance in both day-ahead and intraday markets.
Real-Time Adaptation
Continuously adapts to changing market conditions, price forecasts, and plant constraints to maximise revenue while managing risk.
Advanced Optimisation
Leverages probabilistic forecasting, nonlinear physical modelling, and market impact analysis for superior decision-making.
Risk Management
Proactive identification and mitigation of operational and market risks to prevent costly events that can significantly impact annual performance.
Multi-Market Trading
Intelligent co-optimisation across day-ahead and intraday markets to maximise total revenue from price volatility.
Interested in learning more about how PortfolioEnergy can optimise your BESS assets? Contact us at info@portfolioenergy.com to discuss your requirements.