EarthCurMax-B / EarthCurMax-S - Earth current between PV+ and ground out of range

What does EarthCurMax-B / EarthCurMax-S mean?

The inverter has detected that the earth current between the PV positive terminal and ground is outside the acceptable limits. This indicates a ground fault within the PV system.

• Ground fault in the PV array (e.g., between PV+ and ground).

Click steps to track your progress.

1. 1

   Switch off the external DC disconnect for the Sunny Boy.

2. 2

   Switch off the main AC circuit breaker for the Sunny Boy.

3. 3

   Thoroughly troubleshoot the PV array to locate and clear the ground fault.

4. 4

   If the error persists after clearing the fault, contact SMA America technical support.