Crate mako_emob 

mako-emob — NZR-EMob / Modell 2: the virtual Bilanzierungsgebiet that lets a driver bring their own supplier to a charge point.

A Ladepunktbetreiber (LPB/CPO) runs a regelzonenweites Bilanzierungsgebiet of its own, and every registered Übergabestelle’s flows are an exchange between the VNB’s BG and that one (Anlage 6 zum Beschluss BK6-20-160). The Marktlokation is then balanced in the LPB’s BG — „Modell 2“ — and the LPB assigns each charging session’s energy to the Bilanzkreis of the supplier the customer chose, quarter hour by quarter hour, with intraday supplier changes. BK6-24-267 extends the model to a private Kundenanlage under § 20 Abs. 1, 1a EnWG.

This crate is the allocation engine, its invariants, and the three UTILMD legs that move a Marktlokation between the models — pure domain: no I/O, no wire rendering, no persistence.

Module	Answers
bg	may this Bilanzierungsgebiet exist, here, now?
uebergabestelle	may this Marktlokation enter Modell 2?
session	what quarter-hour energies does this Ladevorgang produce?
allocation	who gets this quarter hour, and what is left over?
fristen	when is each step due?
modellwechsel	which UTILMD leg moves it, and what does the answer carry?
wire	which UTILMD qualifier carries it?
ids	which identifiers are ours to mint, and which are not?

The Entscheidungsbäume (E_0510–E_0513) live in mako_pruefung::emob and the answer Fristen in mako_fristen::antwort, where every other market process keeps them.

The one invariant everything else serves

Anlage 6 §IV.1 obliges the LPB to assign the whole Bilanzierungsgebiet, every quarter hour:

NGZ(t, richtung) = Σ zugeordnete Marktlokationen + Deltamenge

allocation::QuarterHourAllocation holds that exactly and returns a allocation::ConservationProof beside every row. The Deltamenge is a quantity, not a rounding error: it settles in a Bilanzkreis the LPB names, at the LPB’s own cost (§IV.2).

use mako_emob::allocation::{Anspruch, MaloKind, QuarterHourAllocation, Richtung};
use mako_emob::ids::VirtualMaloId;
use mako_emob::session::Viertelstunde;
use rust_decimal::dec;
use time::macros::datetime;

let slot = Viertelstunde::containing(datetime!(2026-11-03 08:07:00 UTC));

// 12 kWh crossed the Übergabestelle; two vehicles claim 9 of them.
let row = QuarterHourAllocation::allocate(
    slot,
    Richtung::Bezug,
    dec!(12),
    &[
        Anspruch { malo: VirtualMaloId::new("veh-1")?, kind: MaloKind::Vehicle, kwh: dec!(6) },
        Anspruch { malo: VirtualMaloId::new("veh-2")?, kind: MaloKind::Vehicle, kwh: dec!(3) },
    ],
)?;

assert_eq!(row.delta_kwh, dec!(3));   // the LPB's own Bilanzkreis carries these
assert!(row.proof.haelt());           // Anlage 6 §IV.1, checked

The market role is NB

The BDEW Rollenmodell defines no LPB: „der LPB kommuniziert aus prozessualer Sicht wie die Rolle NB“ (AWH Kap. 1.4). Every message leaves as NB; mako_engine::marktrolle::Marktrolle::Lpb is a deployment identity, the Nmsb/Amsb pattern, without which the shared Prüfidentifikatoren are ambiguous in a deployment that is both VNB and LPB.

Prüfidentifikatoren

PID	Message	From → To	Answered by
55238	Anmeldung in Modell 2	NB (LPB) → NB (VNB)	55239, E_0513→E_0510
55240	Beendigung der Zuordnung zur MaLo	NB (VNB) → LF	55241, E_0511
55242	Abmeldung aus dem Modell 2	NB (LPB) → NB (VNB)	55243, E_0512
55235 / 55236	Zuordnung / Beendigung ZP der NGZ zur NZR	verantw. NB → benachb. NB, ÜNB	55237, E_0102 / E_0103
55062 / 55063	MaBiS-ZP für die tägliche BK-SZR eMob	NB (LPB) ↔ ÜNB	55064
13018	MSCONS Netzgangzeitreihe	NB (VNB) → NB (LPB), ÜNB	—
13003	MSCONS NZR (eMob), BK-SZR (Kat. A) eMob, tägliche BK-SZR eMob	NB ↔ NB, NB → BKV/ÜNB	21001 / 21002 / 21004

Sources

• BK6-20-160 (21.12.2020) Anlage 6 „NZR-EMob“; Mitteilung Nr. 4 (03.05.2022)
• BDEW AWH „Zum Modell 2 zur ladevorgangscharfen bilanziellen Energiemengenzuordnungsmöglichkeit“ V1.3 (01.04.2025)
• BDEW AWH Ergänzung der Marktregeln … Bilanzkreisabrechnung (MaBiS) V1.0 (27.04.2022) — the Netzgangzeitreihe
• BK6-24-267 (15.05.2025), bestandskräftig
• UTILMD AHB Strom 2.2 Kap. 11; EBD 4.3 Kap. 17
• MaBiS BK6-24-174 Anlage 3, Kap. 3.8 / 3.10 / 5

Re-exports

pub use allocation::AllocationVersion;

pub use allocation::Anspruch;

pub use allocation::ConservationProof;

pub use allocation::MaloKind;

pub use allocation::QuarterHourAllocation;

pub use allocation::Richtung;

pub use allocation::Ueberdeckung;

pub use allocation::Versionsreihe;

pub use allocation::Zuordnung;

pub use bg::BgRegistry;

pub use bg::Regelzone;

pub use bg::VirtualBalancingArea;

pub use error::EmobError;

pub use ids::SessionId;

pub use ids::TokenRef;

pub use ids::VirtualMaloId;

pub use modellwechsel::EmobAbmeldungWorkflow;

pub use modellwechsel::EmobAnmeldungWorkflow;

pub use modellwechsel::EmobAntwort;

pub use modellwechsel::EmobZuordnungsendeWorkflow;

pub use modellwechsel::LegWire;

pub use modellwechsel::Modellwechseldaten;

pub use session::Ladevorgang;

pub use session::Provenance;

pub use session::SessionSplit;

pub use session::SlotEnergie;

pub use session::Viertelstunde;

pub use uebergabestelle::Abwicklungsmodell;

pub use uebergabestelle::AccessBasis;

pub use uebergabestelle::MeteringMode;

pub use uebergabestelle::Modellwechsel;

pub use uebergabestelle::Uebergabestelle;

Modules

allocation

The conservation invariant — Anlage 6 §IV.1, executable.

bg

The LPB’s own Bilanzierungsgebiet — a regelzonenweites BG that exists only to hold charging energy.

error

What can go wrong forming a Modell-2 allocation.

fristen

The Modell-2 deadlines, in one place.

ids

The identifiers Modell 2 needs that the market does not issue.

modellwechsel

The three UTILMD legs that move a Marktlokation into and out of Modell 2.

session

Ladevorgänge, and how one becomes quarter-hour energies.

uebergabestelle

The Übergabestelle — one physical Marktlokation whose flows the VNB treats as an exchange with the LPB’s Bilanzierungsgebiet.

wire

The UTILMD qualifiers Modell 2 rides on, taken from the AHB rather than from prose.

Structs

EmobModule

Engine module for NZR-EMob / Modell 2.

Enums

Datenstatus

Datenstatus of one version of a Summenzeitreihe (Kap. 3.8.3).

Constants

MODELLWECHSEL_PIDS

The Prüfidentifikatoren of the Modellwechsel, in process order.

ZP_NGZ_PIDS

The Prüfidentifikatoren of the Zuordnung des ZP der NGZ zur NZR.