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All LEDs on

All LEDs are on — Initialization in progress

SMA · Sunny Boy Inverters

What does All LEDs on mean?

The inverter is currently initializing. The power from the solar array is sufficient to start control functions, but not yet enough for normal operation. Data transmission is not possible during this phase. This can also happen briefly during inclement weather or low irradiation when the inverter attempts to initialize.

Common Causes

  • Inverter initialization.
  • Low solar irradiation (insufficient power for normal operation).

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Wait for the inverter to complete its initialization sequence, which is a normal startup process.

  2. 2

    Ensure there is sufficient solar irradiation for normal operation; this state is expected in low light.

  3. 3

    If this state persists without progression to normal operation during good sunlight, contact your installer.

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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