A boat's electrical system starts and ends with the battery, and most electrical faults come down to a flat or failing battery or a bad connection somewhere along the way. Start with the battery, then check the connections. The other topics cover wiring a boat and installing electrical gear, from dual batteries and solar panels on a small runabout to the house power, lights and bilge pumps on a bigger boat.
There is a problem with the boat's battery
Open ›The boat's electrical system starts and ends with the battery. It is important to check that the battery is fully charged and in good health before starting to diagnose any electrical problems.
A bad electrical connection is causing high resistance
Open ›Bad electrical connections can cause many different problems. A broken or disconnected wire will stop electricity flowing completely, but it is also possible to have a bad connection that causes high resistance.
Rewiring a small boat from the battery up
Open ›Running fused cable to bus bars under the dash, then wiring everything to them, on my runabout, the Green Machine.
Charging, battery banks and 240V power
Open ›Battery chargers, battery monitors, lithium batteries, inverters and alternators for a bigger boat's house power.
Wiring a steel trawler
Open ›Planning and installing the electrics on Renko, my steel trawler, from the fuse panels to the anchor winch.
Lights and bilge pumps
Open ›Wiring navigation lights, docking lights, underwater lights and bilge pumps.
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