Individual battery cells of a battery might have failed.
10.7
Charging the Battery After Automatic Shutdown in Off-Grid Systems
(Emergency Charge Mode)
When a battery undergoes deep discharge, the Sunny Island shuts down automatically and you cannot restart the
Sunny Island. In order to start the Sunny Island again after an automatic shutdown, you must charge the battery in
emergency charge mode.
In emergency charge mode, the Sunny Island does not form a separate stand-alone grid, and you can charge the
battery using a generator. Battery management is active in emergency charge mode and the Sunny Island charges the
battery in accordance with the parameter settings. In standby mode or in the QCG, you can adjust the parameters for
the battery, e.g., the battery nominal voltage, if a battery cell fails.
Danger to life due to fire or explosion when charging a deep discharged lithium-ion battery.
The charging of a deep discharged lithium-ion battery can lead to its destruction. Death or lethal injuries can result.
• Verify that the lithium-ion battery is not deep discharged (see manual of the lithium-ion battery)
• Charging is performed in accordance with the specifications of the battery manufacturer (see manual of the
lithium-ion battery).
• Only run the emergency charge mode with Sunny Island after approval by the battery manufacturer.
Danger to life from electric shock due to high voltages
High voltages are present inside the Sunny Island. When the enclosure lid is removed, live components can be
touched that can result in death or serious injury due to electric shock.
• Disconnect the Sunny Island from voltage sources (see Section 9, page 45).
Restricted management functions in emergency charge mode
In emergency charge mode, the generator management is not active. The limits for voltage, current and frequency
are not monitored. Set the maximum current consumption of the Sunny Island inverter for charging the battery in
emergency charge mode. The Sunny Island does not record additional strain on the generator due to loads.
Requirements:
☐ The Sunny Remote Control must be connected to the master.
☐ The system must be an off-grid system.
☐ The system must be a single system (single-phase system with Sunny Island).
☐ Lead-acid batteries must be connected (for emergency charge mode of a lithium-ion battery see documentation of
the battery manufacturer).
Procedure:
• Connect the generator to connection
AC1
.
• Charge the battery.
• Disconnect the generator from connection
AC1
.
• Start the off-grid system.
10 Troubleshooting
SMA Solar Technology AG
Operating Manual
89
SI30M-44M-60H-80H-BE-en-33
Summary of Contents for SUNNY ISLAND 3.0M
Page 163: ......
Page 164: ...www SMA Solar com...
