Connection Of A Battery With A Charging/Discharging Current Limit Of 10 A - SMA SUNNY BOY STORAGE 3.8-US Instructions D'installation

SMA Solar Technology AG
Procedure:
The wiring between the fuse holders A/B and DC terminal block must be changed: The conductors
between the fuse holders A/B and terminal block B must be removed.
The 25 A fuses in the fuse holders A/B must replaced with 15 A fuses.
One battery must be connected to the terminal blocks A/B and the other to the terminal blocks of
the fuse holders C.
Figure 13 : Overview for connection of two batteries with a charging/discharging current limit of 10 A each
6.8.1.2 Connection of a battery with a charging/discharging current
limit of 10 A
Usually, the DC terminal C is used for the connection of a battery with a charging/discharging
current limit of 10 A. If the battery is connected to the fuse holders C, the black-start function will not
be available.
If you want to use the black-start function, the parallel connection of the DC terminals A and B must
be removed and the battery connected to the fuse holders A/B.
Additionally required material (not included in the scope of delivery):
☐ 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).
Procedure:
The wiring between the fuse holders A/B and DC terminal block must be changed: The conductors
between the fuse holders A/B and terminal block B must be removed.
Installation Manual
B+ C+ B− C−
A+ A−
A/B+ C+ A/B− C−
15 A 15 A 15 A 15 A
_
+
BAT 10 A BAT 10 A
DC-in COM AC-out
_
+
M1 M2
X1 X2
ANT.
FCC ID: SVF-KP20
IC: 9440A-KP20
A B D-IN
_
+
SBSxx-US-10-IA-xx-12
6 Electrical Connection
SPS
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