Connection Of Two Batteries With Different Charging/ Discharging Currents - SMA SUNNY BOY STORAGE 3.7 Operating Manual

SMA Solar Technology AG
BAT 10 A
_
+
Figure 15: Overview for connection of two batteries with a charging/discharging current limit of 10 A each
BAT 10 A BAT 10 A
_
+ +
Figure 16: Overview for connection of three batteries with a charging/discharging current limit of 10 A each
6.8.1.2 Connection of two batteries with different charging/
discharging currents
You may connect two batteries: The first has a charging/discharging current limit of 20 A and the
second 10 A.
Procedure:
The DC terminals A and B must be switched parallely using the jumpers provided.
The battery limited to a charging/discharging current of 20 A must be connected to the terminal
blocks A+ and A-.
Operating manual
BAT 10 A
_
+
BAT 10 A
_ _
+
A+ B+ C+ A− B− C−
A+ B+ C+ A− B− C−
6 Electrical Connection
DC-in COM
_
+
M1 M2
X1 X2
ANT.
FCC ID: SVF-KP20
IC: 9440A-KP20
A B D-IN
DC-in COM
_
M1
X1 X2
FCC ID: SVF-KP20
IC: 9440A-KP20
A
SBSxx-10-BE-en-11
AC-out SPS
AC-out SPS
+
M2
ANT.
B D-IN
55