Questions Regarding the Sunny Island


Why is the Sunny Island not switching off even though I have opened the load-break switch of the battery fuse?

The Sunny Island may still be supplied from the AC side.

  • Switch off all AC sources and disconnect them from the Sunny Island.

Why is the Sunny Island not switching to energy-saving mode?

Another function might have a higher priority than energy saving mode, e.g., equalization charge or full charge.

After automatic disconnection in battery protection mode, the Sunny Island can no longer be started?

  • Charge the battery only when the Sunny Island cannot be switched on Charging the Lead-Acid Battery After Automatic Shutdown (Emergency Charge Mode)).

    • Switch off all loads.

    • If there is a generator in the system, start the generator manually. When doing so, observe the warm-up time of the generator. 5 minutes without charge current can result in disconnection of the Sunny Island inverter.

    • If sufficient power is available from the generator or the AC sources in the stand-alone grid, e.g., sufficient solar irradiation for PV inverters, switch the Sunny Island on. AC sources in the stand-alone grid can start feeding in electric current only once the Sunny Island has been started and is in operation.

An IPC error is displayed during a firmware update?

  • The display of an IPC error during a firmware update is normal (IPC - Internal Process Communication). The processors cannot communicate with each other during the firmware update.

How can the Modbus interface be tested on Sunny Island?

  • Test the function of the Modbus interface with a Modbus program. Query simple registers (e.g. serial number). Tip: Record the settings in the Modbus program and the queried registers (e.g. with screenshots). The Service requires this information in order to be able to help you in a targeted matter.