User and installation manual

6 Electrical Connection
SMA Solar Technology AG
Installation ManualSBSxx-US-10-IA-xx-1248
Procedure:
The battery limited to a charging/discharging current of 20A must be connected to the terminal
blocks of the fuse holder A/B.
The battery limited to a charging/discharging current of 10A must be connected to the terminal
blocks of the fuse holder C.
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Figure 12 : Overview for connection of two batteries with varying charging/discharging current limits
Connection of two batteries with a charging/discharging current limit of 10A
each
The DC terminals A and B of the inverter are connected in parallel as standard. The parallely
connected DC terminal A/B limits the charging/discharging current to 20A and the DC terminal C
to 10A.
If you want to connect two batteries with a charging/discharging current limit of 10A each,
proceed as follows: First, remove the parallel connection of the DC terminal A/B. Then replace the
25A fuses of the fuse holder A/B with 15A fuses. When the parallel connection has been
removed and the fuses replaced, the DC terminal A/B is able to limit the charging/discharging
current to 10A.
Additionally required material (not included in the scope of delivery):
☐ One cylindrical fuse link (15A, 10x38mm, ≥ 600VDC)
☐ 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 Section6.8.2 "Requirements for the
DC Connection", page53).
ENGLISH