SMA S Technical Description page 129

SMA Solar Technology AG
Level 1: The first level is used to switch the Sunny Backup 2200 to standby mode at times when
energy is not absolutely necessary (e.g., at night). You define the start time using the "223.01
BatPro1TmStr" parameter and define the stop time using the "223.02 BatPro1TmStp" parameter.
Standby
Level 2: The second level of the battery preservation mode ensures that the Sunny Backup 2200
regularly starts every two hours, but only during the window of time in which an energy supply is
expected, and attempts to charge the battery from the AC side. For photovoltaic systems, this occurs
during the day. In this case, you define the start time using the "223.03 BatPro2TmStr" parameter and
the stop time using the "223.04 BatPro2TmStp" parameter.
Standby
Level 3: The third level ensures that the battery is protected from deep discharge and thus protected
against damage. In this case, the Sunny Backup 2200 is switched off completely. To start the inverter,
see section 11.5 „Reactivating the Device Following Automatic Shutdown" (96).
During all three levels, the Sunny Backup 2200 is only stopped if no battery current flows within 5
minutes (limit 3 A charging current).
The limits for all three levels can be set independently of one another. This allows individual levels to
be skipped.
Information
If the BatPro1Soc parameter < BatPro2Soc, level 1 is skipped and only level 2 is
performed.
For level 1 and 2, a hysteresis of 5 % of the SOC charge level is designated for exiting this state.
Battery preservation mode is not automatically exited if an external voltage source (grid
reconnection) is present.
The battery preservation mode on the Sunny Backup 2200 can be exited by manually starting the
device. If, within 5 minutes (see above), charging current is detected, the Sunny Backup 2200
continues to operate; otherwise, it switches off again.
Technical Description
BatPro1TmStp
Regular starts
BatPro2TmStp
Operation
BatPro1TmStr
Standby
BatPro2TmStr
SBU2200-TEN083320
Battery Management
Standby
129