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EV Charger not charging at full rate

Reasons for slow charging and steps to troubleshoot common causes.

Updated over a week ago

If your electric vehicle isn't charging at the expected rate, this doesn't necessarily indicate a problem with your Emporia EV Charger. The charging rate depends on your vehicle, environment, and various settings. Here's how to troubleshoot:

1. Check Vehicle Limitations

  • Verify your vehicle's maximum Level 2 AC charging rate

  • Note that some vehicles have different "home" versus "public" charging behaviors

2. Review App Settings

  • Confirm that the real-time charge rate is set appropriately in the Emporia Energy app

  • Verify that no energy management features are limiting charging (scheduled charging, Peak Demand, Excess Solar, PowerSmart settings, utility demand programs)

  • Ensure maximum amperage matches your installation (40A for NEMA 14-50 outlet, 48A for hardwired)

3. Adjust Vehicle Settings

  • Check vehicle settings to allow maximum charge rate

  • Confirm if "home" and "public" charging rates differ in your vehicle's settings

4. Consider Environmental Factors

  • Battery temperature affects charging rate (too hot/cold reduces rate)

  • Nearly full batteries automatically charge slower to protect battery life

  • Test charging rate when battery level is lower

5. Inspect Installation

  • Verify proper installation and electrical connections

6. Test Compatibility

  • Try another Level 2 AC charger with your vehicle

  • Test the Emporia EV Charger with another vehicle if possible

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