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Green LED flashing (2s on, 2s off)

Green LED flashing (2s on, 2s off) — Waiting for connection conditions

SMA · Sunny Boy Inverters

What does Green LED flashing (2s on, 2s off) mean?

The inverter is waiting for the conditions to be met to start feeding power into the grid. It is not currently active.

Common Causes

  • Grid conditions not met (voltage, frequency, etc.)
  • Inverter has just started up

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure the AC circuit breaker is switched on.

  2. 2

    Turn the DC load-break switch of the inverter to the 'I' (on) position.

  3. 3

    Wait for the inverter to complete its start-up phase (approximately 90 seconds). The green LED should then start flashing or glowing if conditions are met.

  4. 4

    If the green LED continues flashing, the grid conditions for operation are still not met.

Browse all codes in this manual (70)
Verified technical data. Last updated: April 2026

Related Faults

!PV-Overvoltage!!PV-Overvoltage! !DISCONNECT DC! — Overvoltage at DC input10251Event 10251 — Communication status to network switch or DHCP server changed10252Event 10252 — Communication disrupted
Source: SMA Sunny Boy Inverters
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