E13
Emporia
Current Transformer (CT) Sensor Fault
Charger displays E13; app may show 'CT sensor error' or 'Load management fault'; dynamic load management or solar optimization stops working.
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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
Disconnected or reversed Emporia CT clamps, Damaged CT cable, CT plugged into wrong port on charger, Faulty CT input on control board
How to Fix / Troubleshooting
Safety: CT clamps are typically installed in the main panel. Turn off the main breaker before touching any conductors or CTs.
- Inspect CT installation: Verify that Emporia CT clamps are securely closed around the correct conductors (usually the main service lines) and that arrows on the CTs point in the correct direction per the manual.
- Check CT wiring: Follow the CT cables from the panel to the charger. Ensure there are no cuts, pinches, or pulled connectors.
- Verify CT ports: Confirm that each CT plug is inserted into the correct CT input on the Emporia charger or associated energy monitor module.
- Power up and recalibrate: Restore power and use the Emporia app to run any CT calibration or configuration steps.
- If E13 persists: The CT sensor or the CT input circuitry on the control board may be defective. Replace the CT harness first; if that does not resolve the issue, the control board may need replacement.
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Repair Difficulty
Medium
3/5
Required Part
Emporia CT Clamp Set
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