Dc Connection - Chint Power CPS SCA20KTL-DO Installation And Operation Manual

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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.
Figure 3-19(a) Parallel mode
Inverter model
SCA20KTL-DO
SCA25KTL-DO
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
Inverter
DC DC
Input-1 Input-2
n1 n2 n3 n4
n1=n2 =n3=n4
Table 3-4 DC input power specification
Max. DC input power
21KW
26KW
Figure 3-19(b) Independent mode
Rated DC input power
of each input section
27
Inverter
DC DC
Input-1 Input-2
n1 n2 n3 n4
n1=n2 n3=n4
10.5KW
13KW