Stromfee.AI · Computational Battery Engineering

The independent Service-Layerfor battery storage.

We read your BESSdirekt per Modbus TCPout — andoptimieren, verifizierenandmonitorit. Manufacturer-independent. Trader-independent. The service that brings the three together doesn't yet exist in the US for mid-sized operators.

ModbusDirektauslesung Wechselrichter
DA·ID·FCR·aFRR4 markets cross-optimized
PoP BenchmarkPercent of Perfect Foresight
10 MW / 20 MWhReferenz-Demo live
Meet Stromfee · AI for batteriesMeet Stromfee · AI for storage

Was Stromfee for you tut.What Stromfee does for you.

An AI that reads your battery at the register level — and optimizes, verifies and monitors across all markets. In 38 seconds.One AI that reads your battery register-true — and optimizes, verifies and monitors it across every market. In 38 seconds.

▶ Mit Ton abspielen · 0:38▶ Play with sound · 0:38
  • 01Optimize · 4 marketsOptimize · 4 markets
  • 02Verify · Capture rateVerify · capture ratio
  • 03Monitor · every cellMonitor · every cell
  • 04Register-echt · bis zur ZelleRegister-true · to the cell
  • 05§51
  • 06Brief + WissenLetters + answers
  • 07WeltweitWorldwide
Free intro call →Free intro call →
Live unter Modbus-DirektauslesungLive under Modbus direct readout

Energie-SekundenhandelEnergy second trading

DE_LU EPEX Intraday — order book, live trades and trader activity in real time. This is exactly where a battery earns the second-by-second spreads.DE_LU EPEX Intraday — order book, live trades and marketer activity in real time. This is exactly where a battery earns the second-by-second spreads.

110.00
€/MWh
+0.0%
Bid: --
Ask: --
Spread: --
LIVE
KAUFORDERS (BID)BUY ORDERS (BID)MWh
LIVE TRADESDE_LU EPEX Intraday
ZeitTimePreisPriceMWhTraderMarketer
VERKAUFORDERS (ASK)SELL ORDERS (ASK)MWh
Trades/Min
--
Volumen/hVolume/h
--
BuyerBuyers
--%
SellerSellers
--%
Ø TradeAvg Trade
--
Arbitrage
--

Preis-Anker: realer Montel-Intraday-Index (ID3, EPEX DE_LU, lizenziert). Order book & trader activity: market-microstructure visualization — the EPEX market is anonymous; a live tick feed = paid EPEX M7 connection.Price anchor: real Montel intraday index (ID3, EPEX DE_LU, licensed). Order book & marketer activity: market-microstructure visualization — the EPEX market is anonymous; a live tick feed = paid EPEX M7 connection.
Three pillars, one data source

Eine Modbus-Verbindung. Drei Hebelon your revenue.

Once we read your battery directly, three services emerge that today are split across three different providers — if they exist at all.

01 — OPTIMIZE

Optimieren

Schedule optimization across day-ahead, intraday, FCR and aFRR — physically dispatchable, computed with real state-of-charge and efficiency.

  • Perfect-Foresight-Fahrplan als Zielmarke
  • EMS-Register live geschrieben (40011–40109)
  • Gemma daily report, LEAP-71 verified
02 — VERIFY

Verifizieren

Hat dein Direktvermarkter wirklich geliefert? Wir messen den Capture rate— real revenue ÷ achievable revenue — per asset, per month.

  • Real dispatch straight from the battery (Modbus)
  • Computed against an independent benchmark line
  • Reconciled against your direct-marketing statement
03 — SERVICE

Monitor

Performance, degradation and fault monitoring of the hardware — manufacturer-agnostic. Exactly what OEM warranties don't cover.

  • Live-Telemetrie aller Register
  • Early warning on drift / underperformance
  • One point of contact for every manufacturer
Why this doesn't exist as one package yet

The individual pieces exist: market benchmarks, OEM service, monitoring tools.Unified at a single data source — manufacturer-andtrader-independent, for mid-sized battery operators — we found no provider.

OEMs only service what they sold themselves — warranty-driven and often monetization-limiting. Market indices like the ISEA Battery Revenue Index (RWTH/Enspired, free) model the potential of the overall market — not whatyourasset actually settled. Utility-scale O&M is generic and not tailored to mid-sized operators. We combine Optimize, Verify and Monitor on a single Modbus connection.

OEM service locks you in & runs out

Manufacturers only service their own hardware, warranty-driven. When the contracts run out, there's no independent successor to look after the whole stack.

Benchmark ≠ your asset

Market indices show the modeled market potential. How muchyourasset actually earned only becomes clear by reconciling real revenue against the achievable ceiling — per asset.

Monitoring gap

Standard BMS see the pack, not the cell degradation. Performance after years stays blind — without independent monitoring.

So funktioniert's

FromKlemme zur Wahrheit.

SCHRITT 01

Auslesen

We connect viaModbus TCPor API straight to your inverter/PLC — the real 15-minute dispatch, independent of the trader.

SCHRITT 02

Rechnen

Unsere Engine bestimmt den erzielbarenrevenue (perfect-foresight) and rates yourrealen Dispatch an denselben Marktpreisen.

SCHRITT 03

Zeigen

Du siehst den Capture rateper month — and in euros, what was left on the table. Plus hardware health live.

Not a slide — a live asset

Die Live-Demo: 10 MW / 20 MWh, per Modbus angebunden.

What sounds abstract is already running — a digital twin across all Modbus subsystems, with a real market radar, schedule optimization and a LEAP-71-verified daily report. On the glass-box tourBESS Insidewe open it up step by step, from the market all the way into the battery register.

Marktradar (MaStR)

Every BESS ≥ 1 MW in Germany, by state — the acquisition base.

Day-Ahead + Fahrplan

Charge/discharge schedule against the day-ahead curve, physically dispatchable.

Gemma daily report

Automated daily report, LEAP-71 verified — no massaged numbers.

EMS-Register live

Strategy written straight to the real EMS registers 40011–40109.

Kausalketten (P&ID)

From trigger to damage — every step linked to a real Modbus register.

Live-Telemetrie

Every register of every device class, live — the asset's digital twin.

Reference run · Germany · May 24 · 10 MW / 20 MWh
Charge 11am–1pm at avg−€68.84/MWh(negative price → you get paid to charge), discharge 6–8pm at avg152,12 €/MWh.
Real spread €220.96/MWh· daily revenue €4,175.81 — schedule on the actual strategy registers 40011–40109.
Aus dem echten Betrieb

Kein Modell. A real asset.

42 %

Eine reale 1,5-MW-Speicheranlage in Norddeutschland holte in einem Abrechnungsmonat rund 42% of achievable revenue. The rest isn't fate — it's measurable, and therefore negotiable.

Today from the asset strategy report; recomputed manufacturer-independently via direct Modbus readout. Achievable line validated against a market reference (Suena). No extrapolation.

Marktradar · MaStR

We know the market —Asset by asset.

From the German market master-data register (MaStR): every grid-scale battery in Germany, by status and state. That's the addressable base for the full-service offering.

1.160
BESS units ≥ 1 MW in the MaStR
24,7 GW
Total power (installed + planned)
542 / 596
in Betrieb / in Planung — Pipeline > Bestand
Bayern393
Niedersachsen97
Baden-Württemberg96

Filter: rated power ≥ 1 MW (MaStR power table); storage capacity in MWh is not listed separately there. Source: Stromfee market radar.

Who it's for · Independence · FAQ

Independent. Proven.With no lock-in to manufacturer or trader.

Mid-sized operators

Commercial and smaller grid-scale batteries that direct-market and want to know whether their trader really delivers.

Investoren & Finanzierer

who need one neutral, verifiable revenue and health figure for their assets.

Multi-Vendor-Portfolios

One point of contact across Huawei, FENECON, Sungrow & co. — manufacturer-agnostic.

How do you get my asset data?
Via Modbus TCP or API straight from the inverter/PLC — under the operator's authority, independent of the direct marketer. We've already received and interpreted the reference protocol.
Are you dependent on a manufacturer or trader?
No — that's exactly the point. We read the asset directly and compute against an independent benchmark. Neither OEM nor direct marketer determines the result.
Do you support certification too?
Yes. From EMS integration through §51/§13a forensics to compliance per VDE-AR-N 2510-50 / FGW TR8.
What does it cost?
Per asset and month, tiered by power. We define the exact scope in the free intro call — based on your asset and your trader contract.
Stromfee ecosystem

Mehr Werkzeuge, that the competition doesn't have.

Let us read your batteryehrlich durchrechnen.

A free intro call. We look at your asset, your trader contract and show you what's realistically achievable in revenue capture and service gap.

Request intro call → +49 5223 4921030