SMA SUNNY ISLAND 3.0M Installation Manual page 79

SMA Solar Technology AG
This results in the seasonal progression of the ranges.
Figure 23: State of charge ranges of the battery according to the time of year (example)
Range Explanation of the value and parameters
SlfCsmp Range for increased self-consumption
The SlfCsmp range applies to the shortest day of the
year with seasonal adjustment (see Section 8.2.4.1,
page 75). When seasonal adjustment is deactivated,
only the SlfCsmp range is used and the BURes range
increased accordingly.
Minimum width of the self-consumption range /
262.05 MinSlfCsmpSOC
PVRes Range for maintaining the state of charge of the battery
The range size is constant year-round.
Width of the range for the maintenance of the
battery state of charge / 262.04 PVResSOC
BURes Range for battery-backup function
The BURes range applies to the longest day of the year
with seasonal adjustment (see Section 8.2.4.1,
page 75). When seasonal adjustment is deactivated,
only the minimum range is used and the SlfCsmp range
increased accordingly.
Minimum width of the battery-backup range /
262.03 BUResSOC
Installation manual
Behavior of the Sunny Island inverter
The Sunny Island uses the battery for increased
self-consumption.
Excess PV energy is used for conserving the
battery charge. If no excess PV energy is
available, the Sunny Island switches to energy
saving mode. When the state of charge reaches
the BatRes range limit, the Sunny Island charges
the battery up to half of the PVRes range from
the utility grid. To do so, the Sunny Island
charges the battery with maximum efficiency at
25% of the nominal power of the Sunny Island
inverter.
The Sunny Island uses this range for supplying
the battery-backup grid when the utility grid
fails. When the utility grid is available again, the
battery is charged by the Sunny Island with
nominal power from the utility grid.
SI30M-44M-60H-80H-IA-en-32
8 Commissioning
79