MPPT Reverse Connection

Reverse polarity detected at MPPT input. IDs 264–279 = strings 1–16.

Common causes

MC4 connectors reversed at MPPT input during installation

What to check

STEP 1

SAFETY: Wait for string current to drop below 0.5 A. Disconnect DC switch. Verify polarity of MPPT input connections for identified string.

STEP 2

Correct any reversed connectors. Restore DC switch and monitor.

Escalate if

Polarity confirmed correct but fault persists — contact Sungrow support

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