Generator Management; Configuration Of The Thresholds For Generator Connection; Changing The Current Limit For The Generator; Changing The Voltage Thresholds For The Generator - SMA SUNNY ISLAND 3.0M Installation Manual

8 Commissioning

8.4 Generator Management

8.4.1

Configuration of the Thresholds for Generator Connection

8.4.1.1

Changing the Current limit for the Generator

Significance of the current limits:
The generator management limits the consumption of generator current to the maximum set value.
In three-phase systems, the generator current is limited for each line conductor individually. The set value applies to each
line conductor.
For Sunny Island inverters that are operated in parallel, the generator management only limits the total generator current.
The generator current may be unequally distributed to the Sunny Island inverters. If a Sunny Island fails, for example,
more current flows through the remaining Sunny Island inverters.
Enhanced generator management:
If the set generator current is not sufficient for supplying the loads, the generator management requests additional current
from the battery. The system then supplies the loads with the generator current and the battery current.
Procedure:
1. Log in to the communication product as Installer (see the user manual of the communication product) or switch to
expert mode on the Sunny Remote Control (see the Sunny Island operating manual).
2. Select the parameter Nominal generator current / 234.03 GnCurNom and set to the desired value.
Tip: A suitable value for this parameter is 80% of the maximum generator current per line conductor.
8.4.1.2

Changing the Voltage Thresholds for the Generator

The voltage thresholds determine the range within which the generator voltage is allowed to fluctuate. When
the Sunny Island switches to the generator, the stand-alone grid will also fluctuate within this range.
A breach of the set voltage thresholds leads to disconnection of the line conductor from the stand-alone grid or the
generator not being switched on.
Procedure:
1. Log in to the communication product as Installer (see the user manual of the communication product) or switch to
expert mode on the Sunny Remote Control (see the Sunny Island operating manual).
2. Select the parameter Voltage monitoring generator lower minimum threshold / 234.01 GNVtgMin and
set to the minimum generator voltage.
3. Select the parameter Voltage monitoring generator upper maximum threshold / 234.02 GnVtgMax and
set to the maximum generator voltage.
8.4.1.3

Changing the Frequency Thresholds of the Generator Voltage

The frequency thresholds determine the range within which the frequency of the generator voltage is allowed
to fluctuate. When the Sunny Island switches to the generator, the stand-alone grid will also fluctuate within
this range.
A breach of the set frequency thresholds leads to the disconnection of the line conductors from the stand-alone grid or to
the generator not being connected.
Procedure:
1. Log in to the communication product as Installer (see the user manual of the communication product) or switch to
expert mode on the Sunny Remote Control (see the Sunny Island operating manual).
2. Select the parameter Nominal generator frequency / 234.04 GnFrqNom and set to the rated frequency of
the generator voltage.
90 SI30M-44M-60H-80H-IA-en-32
SMA Solar Technology AG
Installation manual