SMA SUNNY ISLAND 4.4M Operating Manual page 85

SMA Solar Technology AG
Two ranges can be adjusted seasonally in battery-backup systems with increased self-consumption:
• Range for increased self-consumption (MinSlfCsmp)
You determine the percentage of the battery capacity that is to be used for increased self-consumption on the
shortest day of the year.
• Range for the battery backup system function (BURes)
You specify the percentage of the battery capacity that is to be used for the battery backup system function on the
longest day.
The longer the days become, the more the SlfCsmp range automatically increases and the BURes range decreases.
The range for increased self-consumption reaches its maximum on the longest day. This results in the seasonal
progression of the ranges.
SOC
100 %
0 %
Winter
Figure 19: State of charge ranges of the battery according to the time of year (example)
Range Explanation of the range and parameters
SlfCsmp Range for increased self-consumption
The SlfCsmp range applies to the shortest day of the
year with seasonal adjustment (see Section 7.6.4.1,
page 80). When seasonal adjustment is deactivated,
only the SlfCsmp range is used and the BURes range in-
creased accordingly.
Battery > Areas of application > Minimum width of
backup power area
Operating Manual
SlfCsmp area
PVRes area
BuRes area
BatRes area
ProtRes area
Summer
Behavior of the Sunny Island inverter
The Sunny Island uses the battery for in-
creased self-consumption.
7 Commissioning
Winter
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