SMA SI 3.0-11 Installation - Manual (Page 69)

SMA Solar Technology AG 8 Commissioning
Installation Manual SI30M-44M-60H-80H-IA-en-30 69
The following ranges result from the parameter default values:
Procedure:
1. Switch to expert mode on the Sunny Remote Control (see the Sunny Island inverter operating manual).
2. Set the following parameters for increased self-consumption:
8.2.4 Battery Usage Through Systems for Increased Self-Consumption
8.2.4.1 Seasonal Adjustment of the Battery Usage
The options for increased self-consumption depend to a large extent on the battery and on the availability of PV energy.
In order to use the battery optimally, you can adjust the depth of discharge of the battery to the application.
In many regions, the PV energy available largely depends on the season and the hours of sunshine. On short days with
few hours of sunlight, the Sunny Island cannot charge the battery fully. Lead-acid batteries in particular age faster due to
low charging over a long period. Therefore, it is better if the battery is not discharged too much by the Sunny Island on
short days. On short days, there is insufficient PV energy to charge the battery. On long days with many hours of sunlight,
the Sunny Island can usually charge the battery fully. On such days, it is better to use as much of the battery capacity as
possible for increasing self-consumption.
BatRes 262.02 BatResSOC
Range for protection against deep discharge
This range can only be reached when the utility grid
fails.
The Sunny Island switches into standby mode.
The Sunny Island starts up every two hours and
attempts to charge the battery with PV energy. If the
battery cannot be charged, the Sunny Island
switches back to standby mode.
When the utility grid is available again, the battery
is charged by the Sunny Island with nominal power
from the utility grid.
ProtRes 262.01 ProtResSOC
Range for protection during deep discharge
This range can only be reached when the utility grid
fails.
When this range is reached, the Sunny Island
switches off in order to protect the battery. When
the utility grid is available again, the system must be
charged manually ("Charging the Battery after Auto
Power Off", see Sunny Island operating manual).
Range Lead-acid battery Lithium-ion battery
BuRes 15% to 100% 13% to 100%
BatRes 10% to 15% 3% to 13%
ProtRes 0% to 10% 0% to 3%
Parameter Value
261.01 SlfCsmpIncEna Disable
262.01 ProtResSOC Range for protection during deep discharge as a percentage of the battery
capacity
262.02 BatResSOC Range for protection against deep discharge as a percentage of the battery
capacity
262.03 BUResSOC Range for battery backup function
If all ranges combined do not amount to 100%, the BuRes range will be increased
automatically.
261.03 Saisonenable No
Range Parameter and explanation of the range Behavior of the Sunny Island inverter