Splitvolt
Reduced Charging Current / Derating
Splitvolt EV charger does not reach the expected charging speed; vehicle charges much slower than rated.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Charger current limit set too low, Circuit breaker rating lower than charger capability, Voltage drop due to long wiring run, Thermal derating inside charger
How to Fix / Troubleshooting
Safety first: Do not increase current beyond what the circuit can safely handle.
- Check charger settings: Verify the Splitvolt current limit is set to the maximum allowed by the circuit (80% of breaker rating) and within charger specs.
- Confirm breaker size: Ensure the breaker and wiring are sized for the desired charging current.
- Measure voltage under load: A qualified person can measure voltage at the outlet while charging; significant drop indicates undersized wiring or long runs.
- Improve wiring: If voltage drop is excessive, have an electrician upgrade wire gauge or shorten the run.
- Monitor temperature: If the charger is derating due to heat, improve ventilation or reduce ambient temperature.
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Repair Difficulty
Medium
3/5
Required Part
Charger Current Setting / Branch Circuit Wiring
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