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Product Description
2.1 Product Introduction
The hopeSun series string inverter is a three-phase string-type grid-connected inverter independently
developed by Hopewind Technology. Its main function is to convert the DC power generated by the PV
string into AC power and feed it into the power grid.
hopeSun 36KTL, hopeSun 40KTL and hopeSun 50KTL-M are 8-input string inverters;
hopeSun 50KTL is a 9-input string inverter;
hopeSun 60KTL, hopeSun 60KTL-M, hopeSun 70KTL and hopeSun 70KTL-M are 12-input string
inverters;
hopeSun 75KTL and hopeSun 80KTL-M are 14-input string inverters
Among them, hopeSun 50KTL-M, hopeSun 60KTL-M, hopeSun 70KTL-M and hopeSun 80KTL-M are
suitable for 500VAC/10kV (35KV) medium voltage grid-connected scenes, such as large-scale ground
photovoltaic power stations and distributed photovoltaic power plants above 400kW;
hopeSun 36KTL, hopeSun 40KTL, hopeSun 50KTL, hopeSun 60KTL, hopeSun 70KTL and hopeSun
75KTL are suitable for 400VAC low-voltage grid-connected scene, such as village-level photovoltaic
power station or industrial and commercial rooftop photovoltaic power station below 500kW.
2.1.1 Schematic
PV strings access the inverter to input DC; the MPPT circuits in the inverter track the maximum power
point inputted by PV string; then the inverter circuit invert the DC to the threes-phase AC.
The schematic diagrams are shown in following figures.
1+
2+
1-
2-
3+
4+
3-
4-
5+
6+
PE
Input EMI
filter
DC switch
Input EMI
filter
PE
MPPT
circuit
1#
MPPT
circuit
2#
MPPT
circuit
3#
BUS+
BUS-
RCD leakage
current
detection
N
A
B
C
fuse
Current hall
5-
6-
7+
8+
7-
8-
Three-
phase
inverter
circuit
LC
filter
Output
EMI
filter
Figure 2-1 Schematic diagram of hopeSun 36KTL/40KTL
1+
2+
1-
2-
3+
4+
3-
4-
5+
6+
PE
Input EMI
filter
DC switch
Input EMI
filter
PE
MPPT
circuit
1#
MPPT
circuit
2#
MPPT
circuit
3#
BUS+
BUS-
RCD leakage
current
detection
PE
A
B
C
fuse
Current hall
5-
6-
7+
8+
7-
8-
Three-
phase
inverter
circuit
LC
filter
Output
EMI
filter
Figure 2-2 Schematic diagram of hopeSun 50KTL-M
