SMA SI 3.0-11 Quick Reference Guide V.4.0 - Manual (Page 17)

SMA Solar Technology AG 5 System With Three Sunny Island Inverters
Installation Manual - Quick Reference Guide FSS-IS-en-40 17
5.2 Connecting the Master
Figure 4: Connecting the master
Position Designation Description/information
A AC power cable Terminals AC2 Gen/Grid terminals L, N
TT
, and PE
Utility grid connection with a three-wire cable to the line conductor L1
Conductor cross-section: 6 mm² to 16 mm²
B Grounding conductor Terminal AC1 Loads/SunnyBoys terminal PE
Additional grounding if the conductor cross-section of the AC power
cable is less than 10 mm²
The conductor cross-section must equal at least the conductor
cross-section of the AC power cable.
C DC+ cable Battery connection
Conductor cross-section: 50 mm² to 95 mm²
Cable diameter: 14 mm to 25 mm
D DC − cable
E Measuring cable of the battery
temperature sensor
Terminal BatTmp
You only have to connect a battery temperature sensor if lead-acid
batteries are used.
Mount the battery temperature sensor in the middle of the battery
connection, in the upper third of the battery cell.