Sungrow SG10KTL-M User Manual

6 Electrical Connection User Manual
35
Item
Parameter
PV cell type
JKM275PP-J4
Power
275W
Open-circuit voltage (STC)
39.1V
Short-circuit current (STC)
9.15A
Open-circuit voltage temperature coefficient (β)
-0.30%/°C
No. of PV cells in a PV string
24
Under the STC condition, where ambient temperature is 25°C, the open-circuit
voltage of PV cells is 39.1V×24=938.4V<1100V.
Supposed that the lowest temperature is -25°C, the open-circuit voltage of PV cells is
24×39.1V×[1+β×(min. ambient temperature- STC temperature)] = 24×39.1V×
[1+(-0.30%/°C)×(-25°C-25°C)]=1079.2V<1100V (meet the operation requirement).
Therefore, PV string should be designed to meet the open-circuit voltage
requirement even under the lowest ambient temperature condition.
PV Input Connection 6.3.2
DC cables from PV strings should be equipped with DC connectors.
Sungrow provides corresponding plug connectors in the scope of delivery for quick
connection of PV inputs. Pairs of MC4 DC connectors are supplied in the scope of
delivery.
To maintain IP65 weatherproof function of inverter, only the supplied DC
connectors or the connectors of the same protection class can be used.
DC Cable Requirements
Tab. 6-1 DC Cable Requirements
Cross-section
Area Range
Outer cable
diameters
Max. Withstand
Voltage
Max. input current
for each PV string
4...6mm
2
12AWG…10AWG
6…9mm
1100V
12A
The input current of each input channel should be less than 12A, otherwise
the fuse may blow out.

Sungrow SG10KTL-M Specifications

General

Brand	Sungrow
Model	SG10KTL-M
Category	Inverter
Language	English