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Green LED slow flash

Green LED flashing slowly — Waiting for feed-in conditions

SMA · SUNNY BOY SMART ENERGY Inverters

What does Green LED slow flash mean?

The inverter is currently waiting for the necessary conditions to be met before it can start feeding power into the grid. These conditions often include sufficient sunlight for power generation or stable grid conditions.

Common Causes

  • Insufficient solar irradiation on the PV modules.
  • Grid conditions (e.g., voltage, frequency) are not yet met.
  • Inverter is still in its startup sequence.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Wait for the environmental and grid conditions to be met; the inverter will automatically start feed-in operation.

  2. 2

    Verify that there is sufficient sunlight hitting your PV modules.

  3. 3

    Check with your grid operator if there are known grid issues in your area that might be preventing feed-in.

Browse all codes in this manual (28)
Verified technical data. Last updated: April 2026

Related Faults

AFCI tripped (5 arcs)AFCI tripped (5 arcs) — Inverter feed-in permanently interruptedAll 3 LEDs solidAll 3 LEDs solid — Inverter update or booting procedureBlue LED fast flashBlue LED flashing fast — System Manager requesting inverter identification
Source: SMA SUNNY BOY SMART ENERGY Inverters
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