SMA SI 3.0-11 Installation - Manual (Page 40)

7 Electrical Connection SMA Solar Technology AG
40 SI30M-44M-60H-80H-IA-en-30 Installation Manual
7.4.9 Connecting the Battery Current Sensor in the Off-Grid System
Figure 14: Connection of the battery current sensor to the Sunny Island.
Cable requirements:
☐ Copper wire
☐ Cable length: maximum 3 m
☐ Conductor cross-section: 0.2 mm² to 2.5 mm²
☐ A measuring cable with intrinsically safe current circuits must be used. For this purpose, "intrinsically safe" means that
the cable is double-insulated and that, in the event of a short circuit, the conductor melts but the insulation remains
intact. In addition, the cable is not combustible.
☐ Conductors in the measuring cable must be twisted.
Procedure:
1. Install the battery current sensor on the DC − power cable between the battery and BatFuse.
2. Connect the BatCur+ measuring conductors to the side for
connecting the BatFuse on the battery current sensor.
3. Connect the BatCur − measuring conductor to the side for
connecting the battery on the battery current sensor.