Technical data

24
3.3.1 DC connection
1) Working mode
CPS SCA23/28KTL-DO series inverter has two PV input sections: DC
Input-1 and DC Input-2. These two sections can work under “Parallel mode” or
“Independent mode”. (see Figure 3-17)
Under Parallel mode, the two PV input sections share one MPP Tracker;
Under Independent mode, each PV input section works with one MPP Tracker.
n1=n2 =n3=n4
DC
Input-1
DC
Input-2
Inverter
n1 n2 n3 n4
DC
Input-1
DC
Input-2
Inverter
n1 n2 n3 n4
n1=n2 n3=n4
Figure 3-17(a) Parallel mode Figure 3-17(b) Independent mode
Table 3-4 DC input power specification
Inverter model
Max. DC input power
Rated DC input power
of each input section
SCA23KTL-DO
24kW
12kW
SCA28KTL-DO
29kW
14.5kW
Remarks: The standard configuration is “independent mode”. If it needs to
switch to the “Parallel mode”, please take the following steps to change the
internal configuration:
1. Remove the cover of the wiring box. (see Figure 3-23)
2. Use No.2 Phillips head screwdriver to remove the wire terminals from
the J9 & J10 terminal blocks on the fuse board.
3. Put the jumper busbar attached in the accessory kit on the J9 & J10