Sungrow SG3KTL-EC User Manual page 42

5 Electrical Connection
To make sure the maximum DC power, PV strings connected to individual
input area should have a homogenous structure, i.e. the same type, the
same number, the same identical tilt and identical orientation.
Prior to connecting inverter to PV inputs, the following specifications should be met:
Type
SG3KTL-EC
SG4KTL-EC
SG5KTL-EC
SG6KTL-EC
In independent mode, when there is only one PV input, the other input may
produce induced voltage. DO NOT touch the unused DC terminals.
PV Configuration Mode-Parallel Mode
For parallel mode, all PV strings with the same type, the same number of PV panels,
identical tilt and identical orientation in series can be connected to the same single
input area. Two trackers are configured in parallel to handle power and/or current
levels higher than those a single tracker can handle.
As shown in the following figure, the inverter may choose parallel mode since there
is no difference between the two PV inputs. The terminals in DC1 input and DC2
input must be short-circuited by Y-type cable connector.
32
DC Power
Area Limit
Each Input
DC1
3191 W
DC2
DC1
4255 W
DC2
DC1
5265 W
DC2
DC1
6312 W
DC2
Open-circuit
for Voltage
for Each Input
1000 V
1000 V
1000 V
1000 V
User Manual
Short-circuit
Limit Current
for Each Input
12.4 A
12.4 A
12.4 A
12.4 A
Limit