Electrical Connection SMA Solar Technology AG
40 SI5048-TEN093630 Technical Description
6.4.2 Battery Current Sensor
In addition to the internal measurement, the Sunny Island provides the possibility to measure the
battery current via a shunt. You need this function if you intend to operate additional DC generators
and DC loads in your off-grid system. Only one battery current sensor connected to the respective
master is required for a cluster.
NOTICE!
Damage to the battery due to the connection of additional DC generators or DC
loads to the off-grid system.
In this operating situation, the internal current measurement of the Sunny Island works
imprecisely; the charge state of the battery is not determined exactly.
• Install an external battery current sensor (shunt).
Example:
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