Boat Electrical Problems: Troubleshooting from the Battery Out
Troubleshoot common boat electrical problems: no-starts, dead trolling motors, dim lights, interference and charging faults, with a step-by-step method.
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Lights Dim When the Motor Starts? Diagnosing Voltage Drop
Voltage drop under load on a boat: what causes it, how to measure it on each side of a circuit, acceptable limits and how…
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Unbalanced Series Battery Banks: Causes and Fixes
What causes an unbalanced battery bank on a boat, how to test each battery in a 24V or 36V series bank, and how to…
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Fish Finder Interference from Trolling Motors: Power-Side Fixes
How to stop fish finder interference from your trolling motor: separate power, grounds, cable routing, transducer placement and noise-reducing settings.
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Marine Battery Voltage Chart: Lithium, AGM and Flooded
Marine battery voltage charts for 12V, 24V and 36V flooded, AGM and LiFePO4 batteries, with how to measure resting voltage and read the results.
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Battery Load Test vs Voltage Test
Battery load test vs voltage test: what each one tells you, why good voltage can hide a bad battery, and which test suits starting,…
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How to Test a Marine Battery
How to test a marine battery at home or on the boat: visual checks, resting voltage, load testing, capacity testing and checks for lithium…
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When to Replace Battery Cables on a Boat
How to replace battery cables on a boat: when to replace them, choosing size and tinned cable, crimping and sealing lugs, routing, fusing and…
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How to Use a Multimeter on Boat Batteries
A boater's guide to multimeter battery testing: choosing a meter, measuring voltage, voltage drop, charging and parasitic current, and avoiding mistakes.
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Boat Won’t Start and Just Clicks: What to Check
Boat won't start and just clicks? Learn how to trace a weak start battery, corroded cables, a bad switch, solenoid or starter, and fix…
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