SMA SI 3.0-11 Installation - Manual (Page 81)

SMA Solar Technology AG 8 Commissioning
Installation Manual SI30M-44M-60H-80H-IA-en-30 81
Significance of the SOC thresholds:
Two lower and two upper SOC thresholds are available for each interval for controlling the load-shedding contactors.
The load-shedding contactors disconnect the loads from the utility grid if the states of charge are as follows:
• When the state of charge of the battery reaches the first lower SOC threshold, the multifunction relay opens the
connected load-shedding contactor for the first level of load shedding. The load-shedding contactor disconnects
those loads from the utility grid that are to be disconnected for the first level.
• When the state of charge of the battery reaches the second lower SOC threshold, the multifunction relay opens the
connected load-shedding contactor for the second level of load shedding. The load-shedding contactor disconnects
the remaining loads from the utility grid.
• When the state of charge of the battery reaches the second upper SOC threshold during recharging, the
multifunction relay closes the connected load-shedding contactor for the second level of load shedding.
The load-shedding contactor connects those loads, which were disconnected for the second level, to the utility grid.
• 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, which were disconnected for the first level, to the utility grid. All loads are now reconnected
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. Setting the SOC threshold for the first interval:
• Select the parameter 242.01 Lod1SocTm1Str and set it to the lower SOC threshold for the first level of load
shedding.
• Select the parameter 242.02 Lod1SocTm1Stp and set it to the upper SOC threshold for the first level of load
shedding.
• Select the parameter 242.07 Lod2SocTm1Str and set it to the lower SOC threshold for the second level of load
shedding.
• Select the parameter 242.08 Lod2SocTm1Stp and set it to the upper SOC threshold for the second level of
load shedding.
5. Setting the SOC threshold for the second interval:
• Select the parameter 242.03 Lod1SocTm2Str and set it to the lower SOC threshold for the first level of load
shedding.
• Select the parameter 242.04 Lod1SocTm2Stp and set it to the upper SOC threshold for the first level of load
shedding.
• Select the parameter 242.09 Lod2SocTm2Str and set it to the lower SOC threshold for the second level of load
shedding.
• Select the parameter 242.10 Lod2SocTm2Stp and set it to the upper SOC threshold for the second level of
load shedding.
6. Ensure that the multifunction relay used for controlling the first level of load shedding is set to AutoLod1Soc
(see Section 8.1.5 "Setting the Functions of the Multifunction Relays", page 66).
7. Ensure that the multifunction relay used for controlling the second level of load shedding is set to AutoLod2Soc.