Battery dies even on shore power
2017 travel trailer, one group 24 lead-acid battery. 30A campground pedestal, plugged in
Customer says: We're plugged in at a campground and the battery is still going dead.
Tests you can run
- Battery voltage, plugged in
- 120V into the converter
- DC output right at the converter
- 12V at the distribution panel bus
- Both sides of the auto-reset breaker near the battery
- Load test the battery
- Converter reverse-polarity fuses
Repair options
The lesson behind this case
Keep going on 12V and batteries
Learn it
- Volts, amps and ohms, the simple way
- Voltage drop: the test that finds bad grounds
- Practice: find the bad connection
- Batteries: lead-acid vs lithium
- Fuses, breakers and grounds
Prove it
- Back lights are dim
- Lithium won't charge on cold mornings
- Coach is dead, battery is fine
- Batteries dead after storage
- Solar quit charging