SMA SI 3.0-11 Installation - Manual (Page 78)

8 Commissioning SMA Solar Technology AG
78 SI30M-44M-60H-80H-IA-en-30 Installation Manual
Procedure:
1. Switch to installer mode on the Sunny Remote Control (see the Sunny Island inverter operating manual).
2. Select the parameter 242.01 Lod1SocTm1Str and set it to the lower SOC threshold.
3. Select the parameter 242.02 Lod1SocTm1Stp and set it to the upper SOC threshold. The upper SOC threshold
must be at least 10 percentage points above the lower SOC threshold.
4. Set the parameters 242.05 Lod1Tm1Str and 242.06 Lod1Tm2Str to the same value, e.g. both to 00:00:00. This
switches off time-dependent load shedding.
5. If the off-grid system is a multicluster system, ensure that the parameter of the multifunction relay is set to
MccAutoLod (see Section 8.1.5 "Setting the Functions of the Multifunction Relays", page 66).
8.3.2 Setting One-Level Load Shedding
One multifunction relay controls the load-shedding contactor depending on the state of charge of the battery.
Significance of the SOC thresholds:
When the state of charge of the battery reaches the lower SOC threshold, the multifunction relay opens the connected
load-shedding contactor. The load-shedding contactor disconnects the loads from the stand-alone grid. When the state
of charge of the battery reaches the upper SOC threshold during recharging, the multifunction relay closes the connected
load-shedding contactor. The load-shedding contactor connects the loads to the stand-alone grid.
Requirement:
☐ In a cluster, the Sunny Remote Control must be connected to the master.
Procedure:
1. Switch to installer mode on the Sunny Remote Control (see the Sunny Island inverter operating manual).
2. Select the parameter 242.01 Lod1SocTm1Str and set it to the lower SOC threshold.
3. Select the parameter 242.02 Lod1SocTm1Stp and set it to the upper SOC threshold. The upper SOC threshold
must be at least 10 percentage points above the lower SOC threshold.
4. Set the parameters 242.05 Lod1Tm1Str and 242.06 Lod1Tm2Str to the same value, e.g. both to 00:00:00.
This switches off time-dependent load shedding.
5. If the loads are only to be reconnected when the set SOC threshold is reached, ensure that the parameter of the
multifunction relay has been set to AutoLod1Soc (see Section 8.1.5 "Setting the Functions of the Multifunction
Relays", page 66).
6. If the loads are to be supplied by an external energy source during recharging of the battery, ensure the following:
• Ensure that the parameter of the multifunction relay is set to AutoLodExt (see Section 8.1.5 "Setting the Functions
of the Multifunction Relays", page 66).
• Ensure that the external energy source can supply the loads with sufficient power.
7. If the off-grid system is a multicluster system, ensure that the parameter of the multifunction relay is set to
MccAutoLod (see Section 8.1.5 "Setting the Functions of the Multifunction Relays", page 66).