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Blue LED glowing

Blue LED glowing — Communication active

SMA · Sunny Boy Inverters

What does Blue LED glowing mean?

The inverter has an active and stable connection to a local network or a direct connection to an end device (computer, tablet, smartphone) via Ethernet.

Common Causes

  • Successful connection to a local network
  • Successful direct connection to a device via Ethernet

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    No action is required, this indicates normal communication.

  2. 2

    You can now access the inverter user interface via your connected device.

  3. 3

    If you experience issues accessing the user interface despite the glowing blue LED, check your device's network settings and browser.

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
Open Manual (Page 17)Search more codes in this manual