User and installation manual
6 Electrical Connection
SMA Solar Technology AG
Installation ManualSBSxx-US-10-IA-xx-1252
Two new fuse holders with a 40A cylindrical fuse link must be installed and connected with DC
terminal blocks. All terminals must be switched parallely.
The battery must be connected to the terminal blocks of the new fuse holder.
Figure 16 : Overview for connection of one battery with a charging/discharging current limit of 30A
6.8.1.5 Connection of Three Batteries
To connect three batteries with a charging/discharging current limit of 10A each, the parallel
connection of the DC terminals A and B must be removed. The installed standard fuse holders and
fuses can be used for the connection of a maximum of two batteries. To connect three batteries, two
external fuse holders are required that must be connected with the DC terminal block in the inverter.
Additionally required material (not included in the scope of delivery):
☐ Two fuse holders for cylindrical fuses (10x38mm)
☐ Four cylindrical fuse link (15A, 10x38mm, ≥ 600VDC)
☐ DC conductors for connection between fuse holders and DC terminal block The requirements
in terms of DC conductors for connection between fuse holders and DC terminal block must be
met (see Section6.8.2 "Requirements for the DC Connection", page53).
☐ DC conductor for connection to fuse holders The requirements in terms of the DC conductors
used for connection to the fuse holders must be met (see Section6.8.2 "Requirements for the
DC Connection", page53).
Procedure:
The two new fuse holders incl. fuses must be installed outside the inverter.
The wiring between the fuse holders A/B and DC terminal block must be changed: The wiring
between the fuse holders A/B and DC terminal block A must be removed.
ENGLISH