Setting Time-Dependent One-Level Load Shedding - SMA SUNNY ISLAND 3.0M Installation Manual

8 Commissioning
• When the state of charge of the battery reaches the first upper SOC threshold during recharging, the multifunction
relay closes the connected load-shedding contactor for the first level of load shedding. The load-shedding contactor
connects those loads to the utility grid that were disconnected for the first level. All loads are connected to the utility
grid.
Requirement:
☐ In a cluster, the communication product or Sunny Remote Control must be connected to the master.
Procedure:
1. Log in to the communication product as Installer (see the user manual of the communication product) or switch to
expert mode on the Sunny Remote Control (see the Sunny Island operating manual).
2. Setting the first level of load shedding:
• Select the parameter Battery state of charge limit for load shedding 1 start / 242.01 Lod1SocTm1Str
and set it to the lower SOC threshold.
• Select the parameter Battery state of charge limit for load shedding 1 stop / 242.02 Lod1SocTm1Stp
and set it to the upper SOC threshold.
• Set the parameter Time load shedding 1 / 242.05 Lod1Tm1Str and the parameter Start time for the
additional time period of load shedding 1 / 242.06 Lod1Tm2Str each to the same value, e.g., to
00:00:00. This will switch the time-dependent load shedding off.
• Ensure that the parameter of the multifunction relay is set to AutoLod1Soc (see Section 8.1.5 "Setting the
Functions of the Multifunction Relays", page 71).
3. Setting the second level of load shedding:
• Select the parameter Battery state of charge limit for load shedding 2 start / 242.07 Lod2SocTm1Str
and set it to the lower SOC threshold.
• Select the parameter Battery state of charge limit for load shedding 2 stop in the additional time period
/ 242.08 Lod2SocTm1Stp and set it to the upper SOC threshold.
• Set the parameter Time load shedding 2 / 242.11 Lod2Tm1Str and the parameter Start time for the
additional time period of load shedding 2 / 242.12 Lod2Tm2Str each to the same value,
e.g., to 00:00:00. This will switch the time-dependent load shedding off.
• Ensure that the parameter of the multifunction relay is set to AutoLod2Soc (see Section 8.1.5 "Setting the
Functions of the Multifunction Relays", page 71).
8.3.4

Setting Time-Dependent One-Level Load Shedding

The time-dependent load shedding divides the day into two time periods (see Section 9.3 "Setting Time-Dependent
Functions", page 100). You set the SOC thresholds that apply for each time period. 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.
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SMA Solar Technology AG
Installation manual