Stored energy only pays when it is traded against the market. Stromfee computes the Decke — the perfect-foresight day-ahead ceiling any ≥1 MW battery could reach — and measures real assets against it. One neutral number, live across 33 markets, register-true, on public data. No hardware to sell. No trading book of our own.
A benchmark is only trustworthy if the yardstick is fixed. The Decke is a hard mathematical maximum, not a forecast and not an opinion: the most any battery of a given size could have earned by trading yesterday's day-ahead prices with perfect foresight.
01
Fixed reference. For each market and day we solve the optimal charge/discharge schedule against realised day-ahead prices — the theoretical revenue ceiling for a 1 MW · 2h battery.
02
Register-true. Real batteries come from public registries at their real capacities — not a modelled fleet, not a marketing assumption.
03
The gap is the signal. Ceiling minus realised revenue is the capture gap — the money a strategy, a vendor, or a dispatch left on the table.
04
Same rule everywhere. One method, 33 markets, every day. Comparable across borders because the yardstick never bends.
Day-ahead price vs. the Deckeillustrative · 24 h
day-ahead priceDecke = perfect-foresight capture
Live radar
33 markets, one yardstick
The Decke a 1 MW · 2h battery could have captured — day-ahead, refreshed daily. Numbers below are the latest snapshot; open a market for the live radar and full history.
Latest daily snapshot · carried from /countries. Values are day-ahead ceilings, not realised trades — open the live radar →
The engine
How the number is produced
Built on the Fariah arbitrage trading optimizer — a perfect-foresight dispatch engine that prices every market, every day. The same instinct that once ran a home on the cheapest hour, now at grid scale.
Ingest public data
Day-ahead prices for 33 markets and the register of ≥1 MW batteries at their true capacities.
Solve the ceiling
Perfect-foresight dispatch computes the maximum arbitrage revenue for each market and day.
Benchmark reality
Measure real assets and strategies against the Decke — the capture gap is the headline.
Publish, neutral
Same method everywhere, refreshed daily, comparable across borders. No book, no bias.
Who reads the benchmark
Built for ≥1 MW BESS operators & direct marketers
// OPERATORS
Grid-scale battery owners
Know the ceiling before you sign a dispatch or trading contract, and see how much of it your asset actually captures.
An independent yardstick, free of any vendor's marketing
Cross-border comparison on one consistent method
Register-true — your real capacity, real prices
// DIRECT MARKETERS
Traders & direct marketers
Prove capture quality to asset owners with a neutral reference that no one can accuse of talking its own book.
Third-party ceiling for every market you serve
Daily-refreshed, defensible in front of investors
Public-data provenance — auditable, not a black box
Why it holds up
An honest benchmark, not a sales pitch
// INDEPENDENT
No hardware, no book
We sell no batteries and run no trading position. Nothing on this page is talking its own book — the incentive is accuracy, not a sale.
// REGISTER-TRUE
Public data, auditable
Batteries come from public registries at real capacities; prices are the realised day-ahead. Provenance you can check, not a model you must trust.
// 33 MARKETS
One method, every market
The same perfect-foresight rule from Poland to Japan, refreshed daily. Comparable numbers because the yardstick never changes.
What is your battery leaving on the table?
Run a Decke-Check: we compute the perfect-foresight arbitrage ceiling for your ≥1 MW battery, from public data, and show the gap to reality. Independent — we sell nothing but the number.
