SMA SUNNY ISLAND 8.0H - Setting Time-Dependent 2-Level Load Shedding

SMA Solar Technology AG 7 Commissioning
Installation Manual SI80H-60H-OffGrid-IA-en-11 95
7.10.6 Setting Time-Dependent 2-Level Load Shedding
Time-dependent load shedding divides the day into two intervals (see Section 7.7"Setting Time-
Dependent Functions",page89). You need toset the SOC limits that apply for each interval for 2-level
load shedding. For example, you can set that as far as possible no loads are to be disconnected from
the stand-alone grid during the day.
Significance of the SOC limiting values:
Two lower and two upper SOC limiting values are available for each interval for controlling the load-
shedding contactors. The load-shedding contactors disconnect the loads if the states of charge are as
follows:
• When the state of charge of the battery reaches the first lower SOC limiting value, the multi-
function relay opens the connected load-shedding contactor for the first level of load shedding.
The load-shedding contactor disconnects those loads from the stand-alone grid that are to be
disconnected for the first level.
• When the state of charge of the battery reaches the second lower SOC limiting value, the multi-
function relay opens the connected load-shedding contactor for the second level of load
shedding. The load-shedding contactor disconnects the remaining loads from the stand-alone
grid.
• When the state of charge of the battery reaches the second upper SOC limiting value during
recharging, the multi-function relay closes the connected load-shedding contactor for the second
level of load shedding. The load-shedding contactor connects those loads to the stand-alone
grid that were disconnected for the second level.
• When the state of charge of the battery reaches the first upper SOC limiting value during
recharging, the multi-function relay closes the connected load-shedding contactor for the first
level of load shedding. The load-shedding contactor connects those loads to the stand-alone
grid that were disconnected for the first level. All loads are now reconnected to the stand-alone
grid.
Requirement:
☐ In a cluster, the Sunny Remote Control must be connected to the master.
1. Switch to installer mode (see Section 7.5).
2. Select the 242.05 Lod1Tm1Str parameter and set it to the start time for the first interval.
3. Select the 242.06 Lod1Tm2Str parameter and set it to the start time for the second interval.
4. Setting the SOC limiting value for the first interval:
• Select the 242.01 Lod1SocTm1Str parameter and set it to the lower SOC limiting value
for the first level of load shedding.
• Select the 242.02 Lod1SocTm1Stp parameter and set it to the upper SOC limiting value
for the first level of load shedding.
• Select the 242.07 Lod2SocTm1Str parameter and set it to the lower SOC limiting value
for the second level of load shedding.