SMA SI 3.0-11 Installation - Manual (Page 80)

8 Commissioning SMA Solar Technology AG
80 SI30M-44M-60H-80H-IA-en-30 Installation Manual
8.3.4 Setting Time-Dependent One-Level Load Shedding
The time-dependent load shedding divides the day into two intervals (see Section 9.3 "Setting Time-Dependent Functions",
page 92). You set the SOC thresholds that apply for each interval. For example, you can set that no loads are to be
disconnected from the utility grid during the night where possible.
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 utility 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 utility 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 242.05 Lod1Tm1Str and set to the start time for the first interval.
3. Select the parameter 242.06 Lod1Tm2Str and set to the start time for the second interval.
4. Select the parameter 242.01 Lod1SocTm1Str and set it to the lower SOC threshold for the first interval.
5. Select the parameter 242.02 Lod1SocTm1Stp and set it to the upper SOC threshold for the first interval.
6. Select the parameter 242.03 Lod1SocTm2Str and set it to the lower SOC threshold for the second interval.
7. Select the parameter 242.04 Lod1SocTm2Stp and set it to the upper SOC threshold for the second interval.
8. Ensure that the multifunction relay used for control is set to AutoLod1Soc (see Section 8.1.5 "Setting the Functions
of the Multifunction Relays", page 66).
8.3.5 Setting Time-Dependent Two-Level Load Shedding
The time-dependent load shedding divides the day into two intervals (see Section 9.3 "Setting Time-Dependent Functions",
page 92). You set the SOC thresholds that apply for each interval for two-level load shedding. For example, you can set
that as far as possible no loads are to be disconnected from the utility grid during the day.
Example: from 10:00 p.m. to 6:00 a.m., the load-shedding contactor is not to disconnect the loads from the
utility grid where possible.
Figure 24: Profile of the SOC thresholds for controlling the load-shedding contactor and the start times for the intervals
The start time for the first interval is set to 6:00 a.m. The lower SOC threshold is set to 40% and the upper SOC threshold
is set to 80% in this time interval.
The start time for the second interval is set to 10:00 p.m. The lower SOC threshold is set to 30% and the upper SOC
threshold is set to 40% in this time interval.