Sungrow SG20RT User Manual

37
5.5 AC Cable Connection
5.5.1 AC Side Requirements
Only with the permission of the local grid department, the inverter can be con-
nected to the grid.
Before connecting the inverter to the grid, ensure the grid voltage and frequency comply with
requirements, for which, refer to "Technical Date". Otherwise, contact the electric power
company for help.
AC Circuit Breaker
An independent three or four-pole circuit breaker must be installed on the output side of the
inverter to ensure safe disconnection from the grid. The recommended specifications are as
follows.
Inverter Model
Recommended Specification
SG3.0RT/SG4.0RT/SG5.0RT/
SG6.0RT/SG5.0RT-P2/SG6.0RT-
P2
16 A
SG7.0RT/SG8.0RT/SG7.0RT-P2/
SG8.0RT-P2
20 A
SG10RT/SG10RT-P2 25 A
SG12RT/SG12RT-P2 32 A
SG15RT/SG17RT/SG15RT-P2/
SG17RT-P2
40 A
SG20RT/SG20RT-P2 50 A
AC circuit breakers should be installed on the output side of the inverter and the
grid side to ensure safe disconnection from the grid.
• Determine whether an AC circuit breaker with greater overcurrent capacity is re-
quired based on actual conditions.
• Do not connect any local load between the inverter and the AC circuit breaker.
• Multiple inverters cannot share one AC circuit breaker.
Residual Current Monitoring Device
With an integrated universal current-sensitive residual current monitoring unit included, the
inverter will disconnect immediately from the mains power once a fault current with a value
exceeding the limit is detected.
User Manual 5 Electrical Connection

Sungrow SG20RT Specifications

General

Model	SG20RT
Category	Inverter
Max. DC Voltage	1100 V
Rated AC Power Output	20 kW
Max. Efficiency	98.6%
Max. DC Input Power	30 kW
Max. Input Voltage	1100 V
Start Voltage	200 V
Number of MPPTs	2
Number of DC Inputs per MPPT	2
Max. AC Apparent Power	22 kVA
Rated Grid Frequency	50 Hz / 60 Hz
Max. Output Current	32 A
Power Factor at Rated Power	>0.99
THDi	<3%
DC Switch	Yes
Protection Class	IP65
Cooling Method	Natural Convection
Protection Degree	IP65
Protection Level	IP65
MPPT Voltage Range	200 V - 1000 V
Operating Temperature Range	-25°C to +60°C
Input Voltage Range	200 V - 1000 V
MPPT Range	200 V - 1000 V
AC Voltage Range	310 V - 480 V