SMA SUNNY BOY STORAGE 3.8-US Instructions D'installation page 38

6 Electrical Connection
Requirements for data cable of battery:
☐ Twisted pair conductors
☐ Cable category: minimum CAT5e
☐ Shielding: yes
☐ Conductor cross-section: 0.25 mm² to 0.34 mm² (24 AWG to 16 AWG)
☐ Recommended number of conductor pairs: 4
☐ External diameter: 6 mm to 8.5 mm (0.24 in to 0.33 in)
☐ Maximum cable length between battery and inverter and, in battery-backup systems, between
automatic transfer switch and inverter: 10 m (33 ft)
☐ If the cables are routed together with the DC conductors in a conduit, each cable has to be
insulated for 600 A.
☐ UV-resistant for outdoor use.
☐ Comply with the requirements of the battery manufacturer.
Assignment of the terminal block:
Terminal block
B C
A
D E F
Procedure:
1. Remove the sealing plugs from the network connection opening on the inverter.
2. Insert the conduit fitting into the opening and tighten from the inside using the counter nut.
3. Attach the conduit to the conduit fitting.
4. Lead the communication cable into the inverter.
5. Strip the communication cable 50 mm (2 in).
6. Trim the cable shield to a length of 15 mm (0.59 in)
and fold it over the cable sheath.
7. Strip the insulation on the insulated conductors each by 6 mm (0.24 in). The CAN L and CAN
H must be a twisted pair.
38 SBSxx-US-10-IA-xx-12
Position
A
B
C
D
E
F
SMA Solar Technology AG
Assignment
Not assigned
Enable
GND
CAN L
CAN H
Not assigned
Installation Manual