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 ( > Energy-saving mode).
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 the 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.
For which operating modes is current-controlled generator operation (I-loop) useful?
When current-controlled generator operation is activated and when the Sunny Island system is synchronized with the external source, the Sunny Island controls only the current and doesn't pulse with AC voltage
In systems with Multicluster-Box, current-controlled generator operation is not possible.
The Sunny Island 4.4M always operates in current-controlled generator operation.
With the Sunny Island 6.0H and the Sunny Island 8.0H, current-controlled generator operation with generator and utility grid is possible.
In a three-phase system, all 3 line conductors of the external energy source must be connected.
In a single-phase parallel system, it is possible to connect the generator to the master only.
The external energy source must have a valid voltage during current-controlled generator operation, otherwise the generator will not be switched on. If the generator or the utility grid switches off unexpectedly during current-controlled generator operation, the Sunny Island restarts. The electrical loads are not supplied for a short time.