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Red LED solid

Red LED glowing solid — Error, inverter operation stopped

SMA · SUNNY BOY SMART ENERGY Inverters

What does Red LED solid mean?

A solid red LED signifies that an error has occurred, which has caused the inverter to stop its operation. A specific event message and number should be displayed on the inverter's user interface or System Manager.

Common Causes

  • Various internal or external inverter faults.
  • An unresolvable error condition has been detected.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the user interface of the inverter or System Manager for the specific event message and corresponding event number (refer to Section 11.1, page 88).

  2. 2

    Address the specific event message by following its recommended troubleshooting steps.

  3. 3

    If no clear message is displayed, try cycling the power to the inverter by turning off the AC and DC breakers, waiting for a few minutes, then turning them back on.

  4. 4

    If the error persists or you cannot identify the specific cause, contact service.

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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