Other electrical accessories

First, check whether your vehicle electrical system is 12 V or 24 V. Accessories such as electrical loads, relays, switches, charging/USB modules, or indicator lights must match the voltage. Current draw is also important: fuses and wire gauge are selected based on load and cable length. Rule of thumb: err on the side of caution—voltage drop is one of the most common causes of malfunctions.

Important factors include the connection standard (e.g., flat plugs, ring terminals, round plugs, waterproof connector systems), wire gauge range, and the correct crimping technique. For onboard use, marine-grade crimp connectors (ideally with heat-shrink tubing) and, if possible, tin-plated contacts are recommended. Ensure clean ground points, correct polarity, and strain relief—this prevents loose connections.

Use splash-proof components, sealed feed-throughs, and connectors with heat-shrink/sealing technology. Protect cable runs from chafing, plan for drip loops, and do not place connectors where water accumulates permanently. In salty air, tin-plated conductors, corrosion-resistant screws/terminals, and regular visual inspections are helpful.

Fuse circuits near the source (battery/distribution panel), use appropriate fuses, and size cables correctly. Secure cables properly (vibration!), maintain separate cable routes for sensitive signals and high loads, and seal cable entries. Label cables/outlets—this saves a tremendous amount of time in the event of malfunctions. For 230 V AC installations: only perform work in accordance with standards or by a qualified contractor.

Common causes include cables that are too thin, incorrect fuses, unsuitable connectors (not marine-grade), poor ground points, missing strain relief, or unprotected feed-throughs. If you consistently ensure correct wire gauges, clean crimps, heat-shrink tubing, chafing protection, and proper fastening, you’ll avoid 80% of typical onboard electrical problems.