SMA Sunny Boy Inverter

Getting to know your SMA SunnyBoy Inverter

To illuminate the screen, tap on the lower lid. 

  • Tapping on the lower lid will also cycle through the daily energy values of the past 16 days and switch to the next text line at the bottom of the screen. 
  • Tapping twice will display the firmware version, serial number, the Bluetooth NetID, and the specified country standard and display language.

A) The display updates the values of your PV plant every 5 seconds. (tap to change, see above)

B) Graphical display of the inverter energy

C) If one of these icons is illuminated, take note of any errors displayed in “H” and contact installer.

D) Current power

E) Daily energy

F) Total energy generated since the inverter was installed

G) Display of Enabled Functions

H) Text line for displaying an event or error


Common Error Messages

If you have Ground Faults or Isolation Errors, do not attempt to power cycle your device because of electrical hazards. Please contact our Customer Support Team.

  1. Arc Fault Detected/Check DC Generator/AFCI detected
    • Power-cycle the inverter, and watch the inverter screen after reenergizing it. You should see a prompt to tap on the inverter to officially clear the error code.
  2. Unstable Operation
    • This typically is caused by snow on panels, when there is not enough input on the DC side. If your panels are clear of snow, get in touch with our Customer Support Team.
  3. Fac-Bfr (Grid Frequency Disturbance)
    • This will happen when the power is out, or if the inverter has disconnected from the power distribution grid.
    • It could also be caused a tripped breaker or blown fuse. To resolve, please contact our Customer Support Team.
  4. K-1 Open

How to Power-Cycle your SMA Sunny Boy Inverter:

1) Turn off the DC disconnect. This is the black dial on the underside of your inverter. Simply turn it to the “off” position.

2) Turn off your system’s AC disconnect. This is located outside next to your utility meter and is just a lever that you’ll pull down into the “off” position.

3) Wait 5 minutes and then turn them back on in reverse order. Throw the AC lever back up into the “on” position and turn the dial on the inverter back to the “on” position.

After these steps, the inverter will start to turn back on and may take a minute or two to reboot. You should see the main screen as normal once the reboot is complete with no error message. If the issue persists, please contact SunCommon Customer Support.

AC Disconnect Lever next to utility meter
AC Disconnect Lever next to utility meter
AC disconnect underneath the ConnectDER

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