SMA INVERTER MANAGER Instructions D'installation page 26

5 LCS-Tool
Input values for Peak Load Shaving
The input value for Discharge Setpoint/
Consumption Limit is interpreted by the Inverter
Manager as a positive value and the one for Charge
Setpoint/Feed-in Limit as a negative value. If the
Inverter Manager, for example, has to limit the grid
reference power to +50 kW and charge the battery
below a grid reference power of +10 kW, the value
50 must be entered for Discharge Setpoint/
Consumption Limit and the value -10 for Charge
Setpoint/Feed-in Limit.
If the value for Discharge Setpoint/Consumption
Limit and the value for Charge Setpoint/Feed-in
Limit is set to 0, this corresponds to the classical
increased self-consumption of PV power without the
shaving of peak loads.
5.2.9 Setting Time of Use
The function Time of Use allows the reduction of energy
costs by effectively using different electricity tariffs
throughout the day. For this, periods can be defined in the
LCS-Tool during which the battery can be charged
cost-effectively and periods during which the battery is
discharged when the energy costs are high.
The battery can be charged up to 60 kW.
In the standard configuration, the battery can be
discharged with 60 kW. If the system is equipped with the
Storage Extension Kit TV-10, the battery can be discharged
with 75 kW.
Battery behavior during the charging period:
• The battery will be charged at the specified charging
power. At night, the energy will be directly drawn from
the utility grid.
If there is unused PV energy available for charging the
battery during the day, the missing energy will be
drawn from the utility grid.
• Discharging and controlling the battery are blocked for
the charging period.
Battery behavior during the discharging period:
• If power is drawn at the point of interconnection, the
battery inverter attempts to compensate for this by
discharging the battery.
• If excess PV power is being fed in at the point of
interconnection, the battery inverter attempts to
balance this by charging the battery.
• If the maximum charging power of the battery system
has been exceeded during the discharging period,
power is fed into the utility grid.
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• If the maximum discharging power of the battery
system has been exceeded, power is drawn from the
utility grid. This power is not used to charge the
batteries.
In order to optimally adapt the charging behavior to the
different conditions over the course of the year, the settings
can be made separately for two periods (Season 1 and
Season 2). For these periods, separate charging profiles
can be defined for each day of the week. Settings for
30-minute intervals or for the entire day can be made.
SMA Solar Technology AG
Installation manual