SMA SUNNY ISLAND 4.4M Operating Manual page 89

SMA Solar Technology AG
SOC
80 %
40 %
30 %
12 a.m.
Standard time period
Figure 21: 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.
Procedure:
• Set the parameters for the standard time period.
• Set the parameters for the additional time period.
Set the parameters for the standard time period
1. Select Device > Load shedding 1 > Additional time range.
2. Set the parameter Time load shedding 1 to the start time for the standard time period.
3. Set the parameter Lmt value battery state of charge for start load shedding 1 to the lower SOC threshold
for the standard time period.
4. Set the parameter Lmt value battery state of charge for stop load shedding 1 to the upper SOC threshold
for the standard time period.
5. Ensure that the parameter of the multifunction relay is set to 1-stage load shedding or 1st stage with 2-stage
load shedding (see Section 7.10.2, page 102).
Set the parameters for the additional time period
1. Select Device > Load shedding 1 > Additional time range.
2. Set the parameter Start time additional time range load shedding 1 to the start time for the additional time
period.
3. Set the parameter Limit battery state of charge for stop load shedding 1 in add time range to the upper
SOC threshold for the additional time period.
4. Set the parameter Limit battery state of charge for start load shedding 1 in add time range to the lower
SOC threshold for the additional time period.
5. Ensure that the parameter of the multifunction relay is set to 1-stage load shedding or 1st stage with 2-stage
load shedding (see Section 7.10.2, page 102).
Operating manual
6 a.m.
Additional time period
7 Commissioning
10 p.m.
SI44M-80H-13-BE-en-15
t
89