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Almena

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Public Methodology

Calculation chain, conventions, capture metrics, storage physics, information sets and inclusion rules.

Version 1.2Effective 24 July 2026

Calculation chain

approved inputs → validation → physical profile or dispatch → eligible cashflows → normalisation → publication

Conventions

  • Market: MIBEL.
  • Bidding zone: Spain (ES).
  • Currency: EUR.
  • Prices: EUR/MWh.
  • Resolution: finest reliable interval supported by the source and applicable rules.
  • Calculations use full precision; rounding occurs only for display.

Capture metrics

CapturePrice = Σ(Pₜ·Qₜ) / Σ Qₜ

CaptureRate = CapturePrice / BaseloadPrice

GrossRevenue = Σ Pₜ·Qₜ

Storage

SOCₜ₊₁ = SOCₜ + ηc·Chargeₜ·Δt − Dischargeₜ·Δt / ηd

The reference BESS uses 90% round-trip efficiency. Where efficiencies are symmetric:

ηc = ηd = √0.90

No double counting

All markets share one physical state. The same MW, MWh, state of charge or grid capacity cannot be sold twice.

Information sets

CodeMeaning
OBSObserved result.
PFPerfect foresight; an analytical upper bound.
DTIDecision-time information only.
FWDForward scenario, not a historical benchmark.
CUSTOMProject-specific analytics, not a public benchmark.

Inclusion

A revenue component is included only when eligibility, observable inputs, market depth, settlement treatment and no-double-counting controls are approved.

Protected IP

Public disclosure includes economic meaning, material parameters, sources, equations, constraints, judgement and limitations. Production source code, credentials, schemas, solver tuning, security controls and proprietary forecast calibration remain confidential.