SMA SUNNY ISLAND 3.0M Installation Manual page 44

7 Electrical Connection
Cable requirements:
☐ Copper wire
☐ Maximum cable length: 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.
☐ Insulated 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+ insulated measuring conductor to the side
for connecting the BatFuse on the battery current sensor.
3. Connect the BatCur − insulated measuring conductor to the side
for connecting the battery on the battery current sensor.
4. On the Sunny Island, connect the insulated conductors to the
terminals BatCur + and BatCur − . Ensure that the cable is
correctly connected (see Section 7.5.6 "Connecting BatVtgOut,
DigIn, BatTMP and BatCur", page 60).
44 SI30M-44M-60H-80H-IA-en-32
SMA Solar Technology AG
Installation manual