What are you looking for?
For example: battery capacity, fuse size, shunt
The subject areas
Eight areas in which the vehicle electrical system can be explained. Each begins with an overview page and leads from there into the individual questions.
Batteries in the On-Board Electrical System: Types, Design, Charging
Technology selection, capacity design, and charging infrastructure — with calculations, limit values, and the most common mistakes made in practice.
In ProgressDistribute and protect power: Control panels, fuses, cross-sections
Cable cross-sections, fuse ratings, and the construction of a distribution board — the calculation methods that turn a consumer list into a distribution.
In ProgressMonitor electrical system: Readings, sensors, displays
Shunts, tank senders, and monitors — which readings are reliable, which are not, and how to detect a measurement error.
In ProgressGenerating energy on board: Alternator, solar, shore power
Alternator, solar, and shore power in combination—design, external controllers, and how multiple charging sources work together.
In ProgressThe networked electrical system: P-Bus, NMEA 2000, App
P-Bus, NMEA 2000, and Remote Access — Structure, Addressing, Termination, and What to Consider When Integrating Third-Party Devices.
In ProgressVehicle Electrical System Refit: Planning, Implementation, Troubleshooting
From evaluating existing systems to troubleshooting with a multimeter — the order, budget, and pitfalls of renovating existing structures.
In ProgressUnderstanding the Vehicle Electrical System: Structure, Voltages, Terminology
12 V or 24 V, voltage drop, consumer balance, and grounding — the parameters upon which all other technical areas are built.
In ProgressStandards for vehicle electrical systems: What is required and why
ISO 13297, Galvanic Corrosion and Shore Power — what is required, why it is required and how to demonstrate compliance.
In ProgressHelp with individual devices
Brief instructions for specific support questions — sorted by device family.
Calculate instead of estimate
No registration required, with the calculation steps shown. Each calculator links to the article that explains the formula.
260Ah
Batteriekapazität
Verbraucherliste, Autarkietage und Entladetiefe ergeben die nötige Nennkapazität der Batterie-Bank.
10mm²
Kabelquerschnitt
Strom, Länge, Systemspannung und zulässiger Spannungsfall ergeben den Querschnitt — mit Rechenweg und nächster Normgröße.
120A
Lichtmaschine
Größe der Batterie-Bank und Technologie ergeben den sinnvollen Ladestrom — samt Prüfung, ob der Riemen ihn überträgt.
20A
Sicherungsgröße
Querschnitt, Verlegeart und Dauerstrom ergeben das Fenster, in dem die Sicherung liegen darf.
67Ah/Tag
Solarertrag
Modulleistung, Region, Jahreszeit und Aufstellung ergeben den realistischen Tagesertrag in Amperestunden.
40cm
Tankgeber-Finder
Medium, Tankhöhe, Zugang und Material ergeben den passenden Geber samt Baulänge, Zubehör und Anzeige.
Terms, briefly explained
Each term is defined in one to two sentences, including the unit, formula, and a reference to the technical article.
Is your question not listed here?
Our team knows every component and typically responds on the same business day.
