SMA SI 3.0-11 Installation - Manual (Page 87)

SMA Solar Technology AG 8 Commissioning
Installation Manual SI30M-44M-60H-80H-IA-en-30 87
Procedure:
1. Switch to installer mode on the Sunny Remote Control (see the Sunny Island inverter operating manual).
2. Select the parameter 235.07 GnTm1Str and set the start time for the first interval.
3. Select the parameter 235.03 GnSocTm1Str and set it to the lower SOC threshold during the first interval.
4. Select the parameter 235.04 GnSocTm1Stp and set it to the upper SOC threshold during the first interval.
5. Select the parameter 235.08 GnTm2Str and set to the start time for the second interval.
6. Select the parameter 235.05 GnSocTm2Str and set it to the lower SOC threshold during the second interval.
7. Select the parameter 235.06 GnSocTm2Stp and set it to the upper SOC threshold during the second interval.
8.4.4.4 Configuring the Load-Dependent Generator Request
Significance of the load-dependent generator request:
If you activate the load-dependent generator request, the Sunny Island requests the generator in the event of
a high load. This prevents the battery from deep electric discharging and cycling and extends its service life.
The performance of the off-grid system for supplying loads increases to the sum of the generator power and the power
of the Sunny Island inverter. This improves the system stability. The load is the average output power of the Sunny Island
inverter.
Loads in a three-phase system:
The generator management considers the total load of all phases. It does not monitor single phases in three-phase
systems. If the switch-on power limit is exceeded, the generator management requests the generator.
Time-based procedure of the load-dependent generator request:
If the switch-on power limit is reached, the generator management requests the generator. If the load then drops to the
switch-off power limit, the generator management resets the generator request after the minimum run time. The generator
management does not record the load as an instantaneous value. The generator management calculates the load during
the averaging time 235.12 GnPwrAvgTm. The greater the averaging time that you set, the less the generator
management reacts to load peaks.
Example: from 10:00 p.m. to 6:00 a.m., the generator is not to start where possible.
Figure 26: Profile of the SOC and the times for generator requests
The start time for the first interval is set to 6:00 a.m. In the first interval, the lower SOC threshold is set to 40% and the
upper SOC threshold is set to 80%.
The start time for the second interval is set to 10:00 p.m. In the second interval, the lower SOC threshold is set to 30%
and the upper SOC threshold is set to 40%.