This document provides information about KSTAR Science & Technology Co., including: - KSTAR is a pioneer in UPS and PV inverter systems in China, founded in 1993. - They have an R&D and manufacturing base of 150,000 square meters and provide products to over 90 countries worldwide. - KSTAR's product portfolio includes data center ESS, EV chargers, PV inverters, and ESS solutions. - Specific details are provided about KSTAR's 1500Vdc 800Vac KSG-250UH utility-scale PV inverter, including its specifications, monitoring features, efficiency, cooling system, and grid support capabilities.

1. Shenzhen KSTAR Science & Technology Co.,Ltd
www.kstar.com
Utility PV System Solution

2. KSTAR Company Profile
PART
02
01
Powering Green Future

3. Shenzhen KSTAR Science & Technology Co.,Ltd
Founded in 1993, Shenzhen KSTAR Science & Technology Co., Ltd
is a pioneer of UPS industry and a total solution provider for Data
Center Critical Infrastructure & PV Inverter Systems in Mainland
China.
KSTAR has been providing high-quality products to over 90
countries and regions worldwide, leading the industrial
development with innovation.
With a floor area of 150,000 square meters and a building area of
167,000 square meters, KSTAR R&D and manufacturing base is a
world-leading base in terms of scale and manufacturing equipment.
Company Profile
03

4. 2005 IDC Integrated System
1993 Company Established
2000 Guanlan
Industrial Park, Shenzhen
2008Certified as NationalHi-Tech
Enterprise & DC Power
Medium-power Online UPS
2001 Storage Battery
2004 High-power Online UPS
KSTAR Development history of the company
1993 Offline UPS
1995 Low-power Online UPS
1996 Entering the European &
US markets
2009 Zhongkai
Industrial Park,
Huizhou
2009 PV Inverter
2009 Estabilish 1st PV
Inverter
2010 Listed in Shenzhen
Stock Exchange
2013 Opened Guangming
Industrial Pack,Shenzhen
2013 EV Charger
2019 Established CATL
KSTAR JV
2015 National Enterprise
Technical Center
2018 JiangXi ChangXin factory
for energy storage product
2014 ESS Products
04

5. 18 Overseas Branch
Development Milestone Office and service center globally
05
40 Overseas Service
Engineers
24/7 Response and Support
Global Service Network

6. KSTAR Business scope of the company
Main Business
Data Center ESS
EV Charger
PV Inverter
ESS Solution
BTM T&D Generation
06

7. Utility PV System Solution
PART 02
Powering Green Future
07

8. 1500V Utility PV System Solution
1500Vdc 800Vac KSG-250UH inverter is the best choice for Utility-scale PV system
08
Block Diagram of Utility PV System

9. KSG-250UH / KSG-200UH
09
Efficient & Intelligent
DC1500V, AC800V
12 MPPT
Max. input current 20A
Max. efficiency up to 99%
String Monitoring
Intelligent I-V curve scan
Remote upgrade
Grid Support
Safe & Reliable
DC & AC type II SPD
Anti-PID function
IP66 protection degree
C5 anti-corrosion
Only 2 strings per MPPT
Smart forced air cooling
AFCI function optional
Low LCOE
6.25MW block design
Support PLC communication
Support AC aluminum cable
Support Y connector
Max. DC/AC ratio up to 1.8
Active & Reactive power control
Night SVG function optional
Fast power response
LVRT/HVRT

10. Shenzhen KSTAR Science & Technology Co.,Ltd
KSG-200UH/ KSG-250UH Technical Specifications
10
Max. DC Voltage
Nominal DC Voltage
Min./Startup Voltage
Input(DC)
1500V
1500V
1080V 1080V
500V / 650V
Full Power MPPT Voltage Range
No. of MPPT
No. of Strings per MPPT
12 12
2
MPPT Voltage Range
Max. Short-circuit Current per MPPT
Nominal Output Power
60A
60A
200kW@40℃/ 175kW@50℃
Nominal AC Voltage
Max. Output Current
640~920V
640~920V
144.3A 180.4A
Max. Input Current per MPPT
Output(AC)
AC Voltage Range
Max. Efficiency 99.0% 99.0%
Euro Efficiency
Efficiency
500~1500V 500~1500V
880~1300V 880~1300V
40A 40A
2
250kW@30℃/ 225kW@40℃/ 200kW@50℃
800V/3W+PE 800V/3W+PE
98.7% 98.7%
500V / 650V

11. Product Appearance features
1500Vdc 800Vac KSG-250UH inverter is the best choice for Utility PV System
11
1. LED Panel: HMI to indicate the
present working state of the inverter.
2. Labels: Nameplate
3. Additional grounding terminals:
Used to ground the inverter.
4. Bottom handles: used to move the inverter.
5. Side handles: used to move the inverter.
6. Mounting ears: use to hang the inverter
onto the mounting-bracket.
7. Wiring area: DC switches, AC
terminals, DC terminals, and
communication terminals.

12. Efficient - 12 MPPT
12MPPT, 2 strings per MPPT Power loss due to shading effect, dust and mismatch can be effectively reduced
12
MPPT MPPT1
Shading
Effect
MPPT2

13. Efficient - Max. Input Current 20A
Max. Input Current 20A Compatible with PV modules such as 600Wp+ Bifacial modules of 210mm cell
13
550Wp(182)
PV Panel
550Wp(210)
600Wp(210)
Im
13.11A
17.29A
17.34A
Vm
42V
31.8V
34.6V
Bifacial modules with 20%backside power gain
15.2A
20.05A

14. KSG-250UH Max. Eff 99%/EU Eff 98.7%
14
Higher efficiency brings more yield
KSG-200UH Max. Eff 99%/EU Eff 98.7%
Higher efficiency brings more yield
880Vdc
5% 10% 20% 30%
1080Vdc
1300Vdc
50% 75% 100%
96.66% 98.02% 98.67% 99.00% 98.92% 98.71% 98.51%
91.00%
92.00%
93.00%
94.00%
95.00%
96.00%
97.00%
98.00%
99.00%
100.00%
5% 10% 20% 30% 50% 75% 100%
PV=880V PV=1080V PV=1300V
880Vdc
5% 10% 20% 30%
1080Vdc
1300Vdc
50% 75% 100%
96.66% 98.02% 98.67% 99.00% 98.92% 98.71% 98.51%
91.00%
92.00%
93.00%
94.00%
95.00%
96.00%
97.00%
98.00%
99.00%
100.00%
5% 10% 20% 30% 50% 75% 100%
PV=880V PV=1080V PV=1300V

15. String Monitoring & I-V Curve Scan
15
Used to check whether the state is good and whether there is a
shadow occlusion or string mismatch, to locate the fault quickly and accurately to improve O&M efficiency and reduce O&M cost
Actual Scan I-V P-V Curve
Current[A]
Voltage[V]
Power[P]
Theoretical Normal
Curve
Shadows Shade
Curve

16. Safe & Reliable – DC & AC Type II SPD
16
Built-in type II SPD on both DC&AC side, which can protect the system from surge or lightning issues
Functional Block Diagram of KSG-250UH

17. Safe & Reliable – Anti-PID Function
17
The Anti-PID function can effectively protect the PV modules from Potential Induced Degradation
Block Diagram of Anti-PID Function

18. Safe & Reliable – IP66 Protection Degree
18
IP66 according to the IEC60529 standard
Water-proof Test
Dust-proof Test

19. Safe & Reliable – C5 Anti-corrosion
20
C5 Anti-corrosion protection is suitable for coastal projects
Fastening Screw
Handle
Enclosure
Front Cover
Structural Component Material Surface Treatment
Fastening Screw SUS304 Stainless Steel Passivation
Handle
Aluminum Alloy Painting Thickness＞80μm
Enclosure
Front Cover
19

20. Safe & Reliable – Only 2 strings per MPPT
20
2 strings input per MPPT, Enough to handle reversed or short-circuit situation, no need fuses, which can reduce the
fault point and the line loss
Functional Block Diagram of KSG-250UH

21. Safe & Reliable – Smart Forced Air Cooling
21
2 Internal Fans
Smart forced air cooling guarantees 25+ years stable working
Internal Circulation Design Advanced Heat Flow Design
6 IP68 External Fans Smart Speed Control

22. Safe & Reliable – Smart Forced Air Cooling
22
Smart forced air cooling guarantees 25+ years stable working
KSG-250UH Temperature Curve KSG-200UH Temperature Curve

23. Safe & Reliable – AFCI Function
23
Support AFCI function, proactively reduces fire risk
Built-in AFCI
Function

24. Low LCOE – 6.25MW Block Design
24
13#
Oil immersed
6250kVA
15~35kV/0.8-0.8kV
COMM
Communication
Power line
MCCB 1#
800V,250A
1#
24#
1 28
1 28
1#
24#
1#
1 28
1 28
1#
24#
25#
1 28
1 28
1#
24#
14#
1 28
1 28
MCCB 14#
800V,250A
26#
ACB 1#
800V,3200A
ACB 2#
800V,3200A
13#
Aux Trafo 5KVA
Dyn11
800V/380-220V
KST-6250K
MV Station
String String Inverter LV Panel Transformer RMU
CCV 630A
Single Line Diagram of 6.25MW Block

25. Low LCOE – Support PLC Communication
25
No need arrangement of RS485 communication cable if PLC communication solution is chosen,
save cost on the communication cable
DSP
ARM
RS485
PLC
RS485 RS485
AC output Cable
ARM output two lines at
the same time, and two
line can work together.
PLC/RS485 just only
choose one
PLC transform
module

26. Low LCOE – Support AC Aluminum Cable
26
Compatible with AC Aluminum Cable Support up to 240mm²aluminum cable, save cost on the AC cable

27. Low LCOE – Support Y Connector
27
2 in 1 Solution can save cost on the PV cable and make higher DC/AC ratio compatible
+
6mm²
6mm²
-
+
-
4mm²
4mm²
4mm²
4mm²
+
-
4* MC4
4* 4mm²output wire
2* MC4
2*“Y”terminal
2* 6mm²output wire

28. 28
High DC/AC ratio up to 1.8
LCOE =
Total Life Cycle Cost
Total Lifetime Energy Production
Time
6:00
Inverter Generation Curve
System Loss
PV Module
Po
wer
18:00
Inverter Full
Power Time
Pn
1.1 Pn
Longer full power working time DC/AC
Lowest LCOE Point
LCOE
1.0
0.8
0.6
0.4
0.2
0.0
1.1 1.2 1.3 1.4 1.5
Time
6:00
Inverter Generation Curve
System Loss
PV Module
Po
wer
18:00
Inverter Full
Power Time
1.7Pn
1.8 Pn
Pn
Low LCOE - Max. DC/AC Ratio 1.8
The high DC/AC ratio makes the full power working time of the
inverter longer which can get more production, and can be used
for low LCOE plant design.

29. Grid Support – Active & Reactive Power Control
29
KSG-250UH PQ Curve KSG-200UH PQ Curve
The max. reactive power output of the inverter can reach 60% of the rated apparent power, power factor ±0.8 adjustable,
and Night SVG function is optional, saving cost on Q compensation equipment

30. Grid Support – Fast Power Response
30
PPC
Grid
Operator
Local
SCADA
Local
Controller
POI
110kV/220kV
10~35kV
Communication
Power line
Control
Value
Actual
Value
Actual Value
Dispatching
Commands
P,
Q,
Cosφ
Local
Controller
No. Sections of Communication Loop Time Delay (ms)
1 Grid Operator to PPC 1000
2 PPC to Local Controller 1000
3 Local Controller to Inverter 250
4 Response of Inverter <30
5 Inverter to Local Controller 250
6 Local Controller to PPC 1000
7 PPC to Grid Operator 1000
Power Response Time＜30ms

31. Grid Support – LVRT/HVRT
31
Integrated with LVRT/HVRT function can stabilize and support the grid, and voltage and time at different point are
adjustable according to different grid code
0 1000
150 2000
Time/ms
In Operation
20%
60%
80%
40%
100%
90%
120%
U/Un
30%
110%
500
Disconnection
Allowed
625 1500 0 1000 10000
...
2000
Time/ms
In Operation
100%
90%
120%
U/Un
Disconnection
Allowed
110%
130%
140%
500
LVRT Curve based on GB Standard HVRT Curve based on GB Standard

32. 32
KST-6250K MV Turnkey Solution
All-in-one Turnkey Solution
2*LV Panel + LV/MV Transformer + RMU + Communication Device
Convenient Transportation
20ft Standard Shipping Container
Convenient Installation
Only LV and MV cable connection needed on site

33. 6.25MVA Oil-type Transformer Technical Specifications
Rated Power
Rated Voltage
Tap Changer
LV/MV Transformer
6250kVA
15~35kV/0.8kV-0.8kV
Off-Circuit-Tap-Changing
Vector Group
Cooling Type ONAN
Tap Range
Winding Material Aluminum
Standard
±2×2.5%
Dy11/y11
No Load Loss/Load Loss Eco Design EU548(Optional)
Monitoring Oil Pressure, Oil Level and Oil Temperature
IEC60076
Oil Type Mineral Oil (PCB Free)
33

34. SF6 MV Switchgear Technical Specifications
Configuration
Rated Voltage
SF6 MV Switchgear (RMU)
V: Vacuum circuit breaker unit for transformer protection
C: Cable load break switch unit for ring network connection
D: Direct cable unit (Optional)
24kV/36kV/40.5kV
Rated Short-circuit Breaking Current
Rated Short-time Withstand Current 20/25kA
Rated Current 630A
20/25kA
Remote Control Motor Driven (Optional)
CCV
Standard IEC62271
34

35. Monitoring System Communication Connection
35
Supervisory Control Local SCADA
Optical Fiber RS485
Ethernet DI/DO
Block Communication N#
Fiber
Switch
Ethernet
Inverter 25#
RS485
RS485
RS485
RS485
RS485
RS485
Inverter 1#
Splice Box
KST-6250K
MV Station
Inverter 2#
Block Communication 1#
Fiber
Switch
Ethernet
DO
Inverter 25#
RS485
RS485
RS485
RS485
RS485
RS485
Inverter 1#
DATA
Acquisition
DO
DI
Splice Box
KST-6250K
MV Station
DI
Inverter 2#
LV Panel 2#
LV Panel 1#
DO
DATA
Acquisition
DO
DI
DI
LV Panel 2#
LV Panel 1#
Monitoring System Diagram

36. Reference
PART 03
Powering Green Future
36

37. 50MW PV Plant in Anhui, China
37
Jinzhai County of Anhui Province, China
This project located in Anhui, China.
The total power capacity of this project is 50MW.
This project uses Kstar 1500V string inverter KSG-250UH.

38. 50MW PV Plant in Inner Mongolia, China
38
Bayannur City in Inner Mongolia, China
This project located in Inner Mongolia, China.
The total power capacity of this project is 50MW.
This project uses Kstar 1500V string inverter KSG-250UH.

39. Shenzhen KSTAR Science & Technology Co.,Ltd
www.kstar.com