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SMA Sunny Backup S

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The SMA Sunny Backup S from Critical Power Supplies.


The Sunny Backup System S consists of
- one Sunny Backup 2200 in combination with one Automatic
- Switch Box S (AS-Box-S.1)
- one external Sunny Remote Control 1 (SRC-1) display
- one external BatFuse A.01 DC fuse.

Reliable back-up electricity supply for family homes

Innovative power backup for private homes: as an add-on to a PV plant, the Sunny Backup Set S switches automatically to off-grid mode within 50 milliseconds in the event of grid failure. Whether in summer or winter: owners of small to mid-sized SMA PV plants and inverters can supply their most important consumer loads themselves in case of a blackout. Our affordable complete solution is suitable for both new solar electricity systems as well as existing PV systems, which can be easily retrofitted with our certified Sunny Backup Set S.

Features and Benefits

- Can be integrated into existing and new PV plants
- Pre-configured set

- Energy supply and battery charging over the grid
- Same high PV efficiency
- Compact and affordableswitching unit
- Smaller battery size due to utilization of the PV energy

- Automatic switching to backup supply in approx. 50 milliseconds
- Automatic disconnection per DIN VDE 0126-1-1 and AS 4777

Description Information
Output (loads)
Nominal power / current during grid operation 5.7kVA kW / 25 A
Backup power (duration / 30 min / 1 min) 2.2 kW / 2.9 kW / 3.8 kW
Number of phases (grid operation / backup operation) 1 / 1
Voltage (range) 230 V (172.5 264.5 V)
Frequency (range) 50 Hz (45 to 65 Hz)
Permitted grid structure (grid side / load side) TN-C / TN-S
Typical interruption time in the event of power outage 50 ms
Input PV plant
Nominal AC PV output / current 4.6 kW / 20 A
Compatible PV inverters All Sunny Boy inverters *
Input battery
Nominal voltage / number of blocks 24 V / 2 × 12 V
Type / energy / capacity per block AGM / 3.4 kWh / 142 Ah
Service life (according to Eurobat) > 12 years
Efficiency / internal consumption
Max. efficiency backup operation 93.6 %
Internal consumption day / night (Silent Mode) 40 W / 6 W
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