CodeRegistry
Brands
  1. Home
  2. SMA
  3. SUNNY BOY SMART ENERGY Inverters
  4. Green LED off
About·Privacy·Terms

CodeRegistry — Your global library for technical solutions.

For your safety: always follow the equipment manufacturer’s official manuals. CodeRegistry is an independent help site and is not affiliated with the brands listed here.

Green LED off

Green LED off — No DC voltage present

SMA · SUNNY BOY SMART ENERGY Inverters

What does Green LED off mean?

If the green LED is off, it means there is no DC voltage being supplied to the inverter from your photovoltaic modules. This indicates that the PV system is not currently generating any power.

Common Causes

  • The DC load-break switch on the inverter is off.
  • Insufficient solar irradiation (e.g., night-time, heavy shading).
  • A wiring issue or fault within the PV array.
  • No PV strings are connected or they are incorrectly connected.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure that the DC load-break switch on the inverter is in the 'ON' position.

  2. 2

    Check for sufficient sunlight on your PV modules and ensure there's no heavy shading.

  3. 3

    Verify that the PV strings are correctly connected to the inverter.

  4. 4

    If the issue persists, contact a qualified installer for inspection of the PV array and wiring.

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
Open Manual (Page 24)Search more codes in this manual