DC-DC Battery Charger Troubleshooting Basics

For DC-DC battery chargers, you must follow proper connection steps for the unit first by referring to the user manual instructions. Once the DC-DC battery charger unit is properly connected to the starter and house battery and/or the PV terminals if it is a DC-DC charger with MPPT, it is important to have a multi-meter in hand to be able to measure the current flow between the input and output cables and be able to check on how well the device is charging your battery.


The most common issues on DC-DC charger devices are wrong parameter settings, blown internal fuses, melting, and burnt internal circuitry that can be recognized by a distinct burnt smell. A typical repair on DC-DC charger devices involves replacing internal fuses most times.


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