SMA SUNNY ISLAND 4.4M Operating Manual page 97

SMA Solar Technology AG
The time-dependent generator request divides the day into 2 intervals. For each interval, you set which conditions there
are for the generator request (see Section 8.12.2, page 117). In this way, you can, for example, set the generator not
to start at night. This ensures that the noise pollution produced by the generator takes place during the day whenever
possible. Both intervals each have a lower and an upper SOC threshold. If the battery reaches the lower SOC
threshold, the generator management requests the generator. When the battery reaches the upper SOC threshold
during recharging, generator management resets this generator request. The following settings are possible for the
SOC thresholds:
• The lower SOC threshold is lower than the upper SOC threshold.
The generator is requested during this interval depending on the state of charge.
• The lower SOC threshold is higher than or equal to the upper SOC threshold.
The generator is not started depending on the state of charge. In this interval, the other settings for the generator
request, e.g. the time-dependent generator request, apply.
From 10:00 p.m. to 6:00 a.m., the generator is not to start where possible.
SOC
80 %
40 %
30 %
12 a.m.
Standard time period
Figure 23: Profile of the SOC and the times for generator requests
For the standard time period, the start time is set to 6:00 a.m. and the end time to 10:00 p.m. The lower SOC
threshold is set to 40% and the upper SOC threshold is set to 80% in this time period.
For the additional time period, the start time is set to 10:00 p.m. and the end time to 6:00 a.m. The lower SOC
threshold is set to 30% SOC and the upper SOC threshold is set to 40% SOC in this time period.
Procedure:
• Set the start times for the standard time period and the additional time period.
• Set the switch-on limits (lower SOC thresholds) for the standard time period and the additional time period
• Set the switch-off limits (upper SOC thresholds) for the standard time period and the additional time period
Set the start times for the standard time period and the additional time period
1. Select Generator > Generator queries state of charge > Additional time range.
2. Set the parameter End time range for generator request to the start time for the standard time period.
3. Set the parameter Start time range for generator request to the start time for the additional time period.
Operating manual
6 a.m.
Additional time period
7 Commissioning
10 p.m.
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