Start by determining whether the problem is actually the battery or another part of the system.
1. Identify the symptom
Is the battery:
- Not charging?
- Not providing power?
- Shutting off under load?
- Providing less runtime than expected?
2. Inspect the system
Look for:
- Loose terminals
- Corrosion
- Damaged wiring
- Blown fuses
- Tripped breakers
- Heat or discoloration at connections
3. Measure battery voltage
Use a multimeter directly at the battery terminals.
For a multi-battery bank, disconnect the batteries as necessary and check each one individually.
4. Verify the charger
Confirm that the charger:
- Matches the battery voltage
- Is compatible with LiFePO₄ batteries
- Is producing the expected output
- Is connected with correct polarity
5. Consider BMS protection
The battery may temporarily disconnect itself because of:
- Low voltage
- Excessive current
- Short circuit
- High temperature
- Low charging temperature
6. Check the load
Make sure the connected equipment does not exceed the battery’s continuous or peak-current ratings.
Also check cable size, cable length, and connections. Excessive voltage drop can sometimes look like a battery problem.
7. Check battery-bank balance
If multiple batteries are connected together, one battery at a different state of charge can cause the entire bank to reach a protection limit sooner than expected.
Working through the battery, charger, wiring, load, and bank one step at a time will resolve many common system problems. The existing Dakota Lithium troubleshooting guide uses the same basic approach of isolating whether the issue is the battery, charger, wiring, or load.
