13 Cleaning and Maintenance
SMA Solar Technology AG
Operating manual
131
SI44M-80H-13-BE-en-15
Check whether the current state of the battery corresponds to the expected state
1. In the parameter group
Battery > Battery > Diagnosis
, select the parameter
Number of battery charge
throughputs
and compare the value with the expected nominal energy throughput.
2. In the parameter group
Battery > Battery > Diagnosis
, select the parameter
Current battery capacity
and
compare the value with the expected usable battery capacity.
If the current state of the battery does not correspond to the expected state, find and eliminate
the causes of this deviation
1. Ensure that the requirements for the ambient temperature of the battery are met (see documentation of the battery
manufacturer).
2. Check and optimize the battery management settings.
3. If you cannot determine the cause for the deviation, contact the Service (see Section 18, page 185).
Maintain battery according to battery manufacturer's specifications
1. Stop the system and switch off the Sunny Island (see Section 9, page 118).
2. Open the load-break switch of the battery fuse and secure against reconnection.
3. Check the battery for visible damage and log results.
4. Measure the fill level and acid density of lead-acid batteries and log the results (see manual of battery
manufacturer).
5. In the case of lead-acid batteries, measure the voltages of the individual cells and log the results (see manual of
battery manufacturer).
6. Perform and log the test routines required by the battery manufacturer (see manual of battery manufacturer).
7. Quickly close the load-break switch of the battery fuse and close the battery fuse (see battery fuse installation
manual).
8. Switch the Sunny Island on and start the system (see Section 9, page 118).
13.6
Emergency charge mode after automatic shutdown
13.6.1 Safety Information for Automatic Shutdown for Lithium-Ion Batteries
WARNING
Danger to life due to fire or explosion when batteries are fully discharged
A fire may occur due to incorrect charging of fully discharged batteries. This can result in death or serious injury.
• Before commissioning the system, verify that the battery is not fully discharged.
• Do not commission the system if the battery is fully discharged.
• If the battery is fully discharged, contact the battery manufacturer for further proceedings.
• Only charge fully discharged batteries as instructed by the battery manufacturer.
13.6.2 Charging the Lead-Acid Battery After Automatic Shutdown (Emergency
Charge Mode)
When a battery is deeply discharged, the battery inverter shuts down automatically and you cannot restart it. In order
to start the battery inverter again after an automatic shutdown, you must charge the battery. The emergency charge
mode is designed for charging the battery.
