What are you looking for?
For example: battery capacity, fuse size, shunt
The topic areas
Eight areas in which the on-board electrical system can be explained. Each starts 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.
Distribute 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.
Monitor electrical system: Readings, sensors, displays
Shunts, tank senders, and monitors — which readings are reliable, which are not, and how to detect a measurement error.
Generating energy on board: Alternator, solar, shore power
Alternator, solar, and shore power in combination—design, external controllers, and how multiple charging sources work together.
The 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.
Vehicle Electrical System Refit: Planning, Implementation, Troubleshooting
From evaluating existing systems to troubleshooting with a multimeter — the order, budget, and pitfalls of renovating existing structures.
Understanding 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.
Standards 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.
Help with individual devices
Short guides to specific questions from our support — sorted by device family.
Calculate instead of guessing
No sign-up, with visible calculation steps. Each calculator links to the article that explains the formula.
260Ah
Calculate battery capacity
Load list, days of autonomy and depth of discharge give the required rated capacity of the battery bank.
10mm²
Calculate cable cross-section
Current, length, system voltage and permitted voltage drop give the cross-section — in the cable configurator, in the same pass as the matching fuse.
Find the right alternator
Enter battery bank, belt system and engine — we propose alternator, regulator and mounting kit and get back to you by email.
20A
Calculate fuse size
Cross-section, installation method and continuous current give the window in which the fuse may lie — in the cable configurator, in the same pass as the cross-section.
67Ah/day
Calculate solar yield
Panel power, region, season and mounting give the realistic daily yield in amp-hours.
40cm
Find the right tank sender
Liquid, tank depth, material and whether drilling is allowed give the right sender, including length, fitting parts and display.
Terms, briefly explained
Each term defined in one or two sentences, with unit, formula and a link to the in-depth article.
Your question is not covered here?
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