Battery Monitor Reading Wrong? Step-by-Step Troubleshooter
Percentage drifting or jumping? Usually a wiring or settings fix.
This is for shunt-type monitors. See our guide How to Read a 12V Battery Monitor. Work through one question at a time. You can go back or start over whenever you like.
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Safety: this troubleshooter is general information. Follow the maker's manuals. Work on 240V AC wiring, including inverter outputs and mains inlets, must be done by a licensed electrician. Have an auto electrician check high-current DC work if you're unsure.
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