Electrical Connection of the Sunny Backup 2200
SMA Solar Technology AG
64
SBU2200-TEN083320
Technical Description
The Sunny Backup 2200 uses the SMA-Net protocol for communication.
7.6 Additional Connections
7.6.1 Battery Temperature Sensor
The battery temperature sensor measures the temperature of the connected battery. This is necessary
since the optimum charging voltage for a battery strongly depends on the temperature. Further
information is provided in section 16.4 „Charge Control“ (125). A battery temperature sensor is
included with the Sunny Backup 2200 (see packing list).
Proceed as follows when connecting the battery temperature sensor:
1. Pierce the rubber plug with a pin-
shaped object.
2. Attach cable end sleeves to the
conductors.
3. Route both conductors through the
opening from the outside.
Setting the batteries
If Sunny Boys are connected to the communication bus, then the baud rate must be set to
1200 bps (factory setting).
Defective battery temperature sensor
If the battery temperature sensor fails (e.g., due to a short circuit or cable break), the Sunny
Backup 2200 will run in a safe setting that will drain the battery over time. A warning will
appear in the display of the Sunny Backup 2200 if this occurs.
• Replace the defective battery temperature sensor as soon as possible.
• Always run the Sunny Backup 2200 with a battery temperature sensor (included in
delivery).
NOTICE!
Damage to battery due to installation error.
• Be sure to install the battery temperature sensor included in the delivery.
• Do not drill holes into the battery when installing the battery temperature sensor!
– Attach the battery temperature sensor externally to one of the battery cells.
– Select the space between two cells or the middle area of the battery bank where
the most heat is generated during operation.
