SMA SUNNY ISLAND SIC40-MPT, Technical Description

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SMA Solar Technology AG Electrical Connection
Technical Description SIC40-TEN081110 29
5.6.2 Battery Temperature Sensor
To allow a temperature-independent charge control during stand-alone operation or during
operation with a Sunny Island 3324/4248, you can connect an external battery temperature
sensor (BAT-TEMP-SENSOR) to the charge controller.
SMA Operation
No external battery temperature sensor is required when operating in "SMA operation"
mode.
NOTICE!
Damage to battery due to over or insufficient charging.
In the "Stand-alone operation" operating mode, a battery temperature sensor must be
connected. Otherwise, the battery may be overcharged or insufficiently charged if
temperatures outside of the temperature range +15 °C to 35 °C frequently occur.
• Connect an external battery temperature sensor if the charge controller is operated
in stand-alone operation or with a Sunny Island 3324/4248.
2.2 k Resistor
A 2.2 k resistor is connected as standard to the connection terminal for the battery
temperature sensor.
If both the resistor and a battery temperature sensor are not connected during stand-
alone operation or during operation with a Sunny Island 3324/4248, the charge
controller cannot be commissioned.