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communication
3.3.1 DC connection
1) Working mode
CPS SCA20/25KTL-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 3-19)
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 3-19(a) Parallel mode Figure 3-19(b) Independent mode
Table 3-4 DC input power specification
Inverter model
Max. DC input power
Rated DC input power
of each input section
SCA20KTL-DO
21KW
10.5KW
SCA25KTL-DO
26KW
13KW
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 3-28)
2. Use No.2 Phillips head screwdriver to remove the wire terminals from
