SMA SI 3.0-11 Installation - Manual (Page 76)

8 Commissioning SMA Solar Technology AG
76 SI30M-44M-60H-80H-IA-en-30 Installation Manual
• Level 3
If the SOC drops below the threshold for level 3, the Sunny Island switches itself off. This protects the battery against
deep discharge and severe damage. To charge the battery again, the Sunny Island must be switched on and started
manually.
At all three levels, the Sunny Island will only switch to standby mode or switch itself off if no charging current has flowed
in the battery for at least five minutes.
Recharging the battery with an external energy source:
In levels 1 and 2 of battery protection mode, you can charge the battery at any time with an external energy source.
If a voltage is present on connection AC2, the Sunny Island exits standby mode.
If the Sunny Island has switched to level 3 of battery protection mode by itself, you must charge the battery in emergency
charging mode (see the Sunny Island inverter operating manual).
Time settings:
The start and end time can be configured for battery protection mode levels 1 and 2.
If the SOC drops below the threshold for level 1, the Sunny Island switches to standby between the start time and end
time.
If the SOC drops below the threshold for level 2, the Sunny Island switches to standby between the start time and end
time. The Sunny Island attempts to charge the battery in the remaining time.
Requirement:
☐ In a cluster, the Sunny Remote Control must be connected to the master.
Procedure:
1. Switch to expert mode on the Sunny Remote Control (see the Sunny Island inverter operating manual).
2. To change battery protection mode 1, set the desired times and SOC thresholds:
• Select the parameter 223.01 BatPro1TmStr and set to the desired start time.
• Select the parameter 223.02 BatPro1TmStp and set to the desired end time.
• Select the parameter 223.05 BatPro1Soc and set to the desired SOC threshold.
3. To change battery protection mode 2, set the desired times and SOC thresholds:
• Select the parameter 223.03 BatPro2TmStr and set to the desired start time.
• Select the parameter 223.04 BatPro2TmStp and set to the desired end time.
• Select the parameter 223.06 BatPro2Soc and set to the desired SOC threshold.
4. To change battery protection mode 3, select the parameter 223.07 BatPro3Soc and set to the desired SOC
threshold.
8.2.6 Configuring the Resistance of the Battery Cable
You can optimize the battery management if you set the resistance of the battery cable in expert mode.
Figure 23: Designation of the cable
The resistance of the battery cable is composed of the resistance of cable 1, the BatFuse, and the resistance of cable 2.