Synthetic case explorer

TariffHarbor Studio

Trace a charging valuation

Follow energy acquisition, markup, tax and margin into a booking gate.

Explore the evidence

Select a precomputed synthetic case, inspect input assumptions and download its JSON evidence or result CSV.

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What this edition demonstrates

Decimal half-up cent rounding and deterministic parallel tax and margin checks.

Illustrative configured tax; not tax-law validation. No sessions are booked.

The public website hosts a read-only synthetic projection. The full authenticated source application and its Git history are maintained privately.

All fixtures are fictional. No sign-in, customer records, operational writes or paid external model calls are involved.

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MATHEMATICAL SPECIFICATION & UNITS

Governing Equations, Inputs, Outputs & Dimensional Conventions

TariffHarbor Studio executes deterministic client-side calculations in the browser. Every scenario is governed by explicit mathematical formulations and unit checks:

C_acq = E_kWh × c_connector + c_roaming; R_net = round_half_up(C_acq × (1 + markup) + fee_session + D_min × fee_min, 0.01); Tax = round_half_up(R_net × τ_tax, 0.01); Total = R_net + Tax; Margin (%) = (R_net − C_acq) / R_net × 100

Declared Units & Arithmetic Conventions: Session energy in kWh; duration in minutes; acquisition costs and fees in EUR; markup, margin, and illustrative tax in %; half-up rounding to 0.01 EUR (integer cents).

Scope & Operational Boundary: Charging-energy valuation with acquisition cost, markup, illustrative tax and margin calculations. Synthetic configuration; no booking, billing, legal tax validation or real tariff feed.

Launch Interactive TariffHarbor Studio Runtime → · Read Full Methodology & Validation Notes → · Download JSON Dataset (run/catalog.json)

REPRODUCIBLE WORKED EXAMPLE & BENCHMARK TABLE

Verified Case Study & Held-Out Reference Table

Worked Verification Case: Case 1 (DC fast-charge session: 28 kWh, 40 min, DC acquisition cost = 0.29 EUR/kWh, roaming cost = 0.40 EUR, markup = 25%, session fee = 1.00 EUR, minute fee = 0.01 EUR/min, illustrative tax = 20%, min margin policy = 8%): Net pre-tax charge = 12.05 EUR, Illustrative Tax = 2.41 EUR, Total Session Valuation = 14.46 EUR, passing the 8% minimum margin and 250 kWh / 500 EUR policy caps.

Reproducible benchmark scenarios shipped in the TariffHarbor Studio browser edition (Synthetic / Precomputed Evidence)
Case ID	Connector	Energy (kWh)	Duration (min)	DC/AC Cost (EUR/kWh)	Markup (%)	Tax (EUR)	Total (EUR)	Policy Gate
Case 1 (Standard DC)	DC	28.0	40	0.29	25%	2.41	14.46	Pass (Active)
Case 2 (AC Commuter)	AC	11.0	120	0.20	20%	0.97	5.81	Pass (Active)
Case 3 (High Volume Fleet)	DC	85.0	55	0.29	10%	5.75	34.52	Margin Check

PROCEDURAL USAGE GUIDE

How to Use TariffHarbor Studio in 3 Reproducible Steps

Select a Baseline Scenario or Practice Module: Open the interactive browser runtime and choose one of the shipped synthetic presets or diagnostic modules to load its verified input parameters and unit declarations.
Inspect Intermediate Traces & Constraints: Review the computed ledger, error diagnostics (MAE/RMSE/margin/balance checks), or bilingual explanations alongside the governing equations documented on mkbiz.co.business/methodology/.
Export Portable Evidence (JSON / CSV): Export your scenario results, assumptions, or local study plan as a self-contained JSON or CSV file for offline verification and local re-import.

FREQUENTLY ASKED QUESTIONS

Methodological & Boundary FAQs

What mathematical model and units does TariffHarbor Studio use?

TariffHarbor Studio applies C_acq = E_kWh × c_connector + c_roaming; R_net = round_half_up(C_acq × (1 + markup) + fee_session + D_min × fee_min, 0.01); Tax = round_half_up(R_net × τ_tax, 0.01); Total = R_net + Tax; Margin (%) = (R_net − C_acq) / R_net × 100. Units: Session energy in kWh; duration in minutes; acquisition costs and fees in EUR; markup, margin, and illustrative tax in %; half-up rounding to 0.01 EUR (integer cents).

What are the operational boundaries and limitations of TariffHarbor Studio?

Charging-energy valuation with acquisition cost, markup, illustrative tax and margin calculations. Synthetic configuration; no booking, billing, legal tax validation or real tariff feed. All computations run deterministically in the browser on synthetic or precomputed demonstration fixtures.

How can I reproduce the benchmark results in TariffHarbor Studio?

Open the interactive browser workspace at ./run/, select Case 1 to inspect the worked result (Case 1 (DC fast-charge session: 28 kWh, 40 min, DC acquisition cost = 0.29 EUR/kWh, roaming cost = 0.40 EUR, markup = 25%, session fee = 1.00 EUR, minute fee = 0.01 EUR/min, illustrative tax = 20%, min margin policy = 8%): Net pre-tax charge = 12.05 EUR, Illustrative Tax = 2.41 EUR, Total Session Valuation = 14.46 EUR, passing the 8% minimum margin and 250 kWh / 500 EUR policy caps.), and export the JSON or CSV evidence ledger.

PROVENANCE, ATTRIBUTION & RESEARCH ECOSYSTEM

Engineering Attribution & Interconnected Research Hub

Authored and maintained by Mohammad Rezwan Khan, PhD (Aalborg University · BESS QA/QC & Power Systems Specialist). Canonical URL: https://mkbiz.co.business/charging-tariffs/ · Source revision: verified-rel · Runtime SHA-256 prefix: verified-sha256 · Repository provenance: https://github.com/mohammadrezwankhan/tariffharbor-studio (private source engine; public deterministic browser projection).

Application Metadata (app.json) · AI / LLM Discovery Guide (llms.txt) · Full Technical Corpus (llms-full.txt) · Semantic Knowledge Graph (knowledge-graph.jsonld)