Blink EV charger displays E20 and may indicate an insulation resistance or isolation fault (on models with this feature).

Safety first: An isolation fault can present a shock hazard. Do not use the charger until the fault is resolved. Turn off power at the breaker.

Steps to troubleshoot:

• Inspect cable and connector: Look for cuts, abrasions, or melted spots on the Blink cable and handle. Replace if any damage is found.
• Check for moisture: Examine the connector and cable entry for signs of water. Dry thoroughly and correct any sealing issues at the cable gland.
• Test with another vehicle: If E20 only appears with one EV, the vehicle may have an internal isolation fault and should be serviced.
• Internal wiring: With power OFF and cover removed, inspect output wiring for insulation damage where it passes through grommets or near sharp edges.

If no visible cause is found and E20 persists with multiple vehicles, the insulation monitoring device or main control board is likely faulty and must be replaced by a qualified technician.