Battery Management
SMA
Technologie AG
Page 92
SI5048-11:EE4206
Technical Description
13.5 Battery preservation mode
The Sunny Island 5048 has a sophisticated battery preservation mode. The battery
preservation mode prevents the battery from being deeply discharged, as much as
possible, when the energy supply is low and thus prevents a total system failure as well
as damage to the battery.
The battery preservation mode has three levels that are activated as a result of the state
of charge (when the charge drops below the respective limit, "#223.05 BatPro1Soc",
"#223.06 BatPro2Soc" and "#223.07 BatPro3Soc" parameter):
Level 1:
The first level is used to switch the inverter into standby mode in times during
which the 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.
Level 2:
The second level of the battery preservation mode ensures that the inverter
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.
Level 3:
The third level ensures that the battery is protected from deep discharge and
thus protected against damage. In this case, the inverter is switched off completely. To
start the inverter, please see section 9.5 "Reactivating the Device Following Automatic
Shutdown" (Page 63).
During all three levels, the inverter is only stopped if no battery current flows within
5 minutes (limit 3 A charging current).
Standby
Standby
0h
6h
12h
18h
BatPro1TmStp
BatPro1TmStr
Operation
24h
Standby
Standby
Regular starts
0h
6h
12h
18h
BatPro2TmStp
BatPro2TmStr
24h
Summary of Contents for Sunny Island 5048
Page 22: ...The Sunny Island 5048 SMA Technologie AG Page 22 SI5048 11 EE4206 Technical Description...
Page 26: ...Safety Instructions SMA Technologie AG Page 26 SI5048 11 EE4206 Technical Description...
Page 94: ...Battery Management SMA Technologie AG Page 94 SI5048 11 EE4206 Technical Description...
Page 114: ...Connecting External Sources SMA Technologie AG Page 114 SI5048 11 EE4206 Technical Description...
Page 160: ...Contact SMA Technologie AG Page 160 SI5048 11 EE4206 Technical Description...
Page 169: ...SMA Technologie AG Glossary Technical Description SI5048 11 EE4206 Seite 169...
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