Yellow LED: 5 seconds on, 3 seconds off, 4 blinks — High DC Input Voltage Detected

What does Yellow LED pattern mean?

The Sunny Boy inverter has detected that the DC input voltage from your solar panels is too high. This condition can be dangerous and may cause permanent damage to the inverter if not addressed. The LED pattern repeats multiple times.

• The DC input voltage from the solar panels is excessively high
• The solar panel array may be incorrectly configured for the inverter
• A fault within the solar panel system is causing an overvoltage condition

Click steps to track your progress.

1. 1

   Immediately disconnect the solar panel (PV) array from the Sunny Boy inverter.

2. 2

   Have a qualified technician inspect the solar panel input source to determine the cause of the high voltage.

3. 3

   Before reconnecting or re-energizing the Sunny Boy, always test the DC voltage at the DC disconnect switch.