Alpha ESS PWG2-50K User manual

User's Manual
PWG2-50K/100K-EX Bi-directional Hybrid Storage Inverter

Sinexcel
PWG2-50K/100K-EX
Bi-directional Hybrid Storage Inverter
User's Manual
Data version: V1.0
Filed in: August 17, 2017
Applicable to: PWG2-50K/100K-EX
______________________________________________________________________________________________
Shenzhen Sinexcel Electric Co., Ltd. (“Sinexcel”) provides its customers with all-around technical support.
Users can contact Sinexcel’s local office or customer service center or directly contact Sinexcel
Headquarters.
Shenzhen Sinexcel Electric Co., Ltd.
All rights reserved. In case of any content change, it shall be without prior notice.
Website: www.sinexcel.com
Add: Building 6, Area 2, Baiwangxin High-tech Industrial Park, No. 1002, Songbai Road, Nanshan District,
Shenzhen
Postcode: 518055
Hotline: [phone]
Fax: [phone]
E-mail: [e-mail]

Table of Contents
Chapter I Overview.......................................................................... 3
1.1 Model definition............................................................................................................................................................3
1.2 Symbolic interpretation...............................................................................................................................................3
1.3 System application .......................................................................................................................................................4
1.4 Operation model...........................................................................................................................................................5
1.5 Safety instructions ........................................................................................................................................................6
1.6 Precautions....................................................................................................................................................................7
1.6.1 Personnel requirements.......................................................................................................................................7
1.6.2 Equipment use scope ...........................................................................................................................................7
1.6.3 Cabinet label...........................................................................................................................................................7
1.6.4 Description ..............................................................................................................................................................7
Chapter II Introduction to Modules........................................................... 1
2.1 Overall dimension of PCS-AC module.....................................................................................................................1
2.2 Overall dimension of PCS-DC module ....................................................................................................................2
Chapter III Introduction to System............................................................ 4
3.1 System composition.....................................................................................................................................................4
3.2 Technical parameters ...................................................................................................................................................5
3.3 Overall dimension.........................................................................................................................................................6
3.4 Description .....................................................................................................................................................................6
Chapter IV Device Installation................................................................ 8
4.1 Transport and storage .................................................................................................................................................8
4.2 Removal...........................................................................................................................................................................8
4.3 Open-case inspection..................................................................................................................................................9
4.3.1 Overview ..................................................................................................................................................................9
4.3.2 Packing list...............................................................................................................................................................9
4.4 Installation requirements..........................................................................................................................................10
4.4.1 Environment requirements................................................................................................................................10
4.4.2 Ground requirements .........................................................................................................................................10
4.4.3 Ventilation .............................................................................................................................................................10
4.4.4 Operation space...................................................................................................................................................11
4.4.5 Other requirements.............................................................................................................................................11
4.5 Cabinet installation.....................................................................................................................................................12
4.6 Electrical connection ..................................................................................................................................................13
4.6.1 Input requirement ...............................................................................................................................................13
4.6.2 Output reqirement ..............................................................................................................................................13
4.6.3 Wiring mode.........................................................................................................................................................13
4.6.4 System grounding ...............................................................................................................................................14
4.6.5 AC side wiring.......................................................................................................................................................15

4.6.6 Wiring of terminal strips....................................................................................................................................16
4.7 Check after installation..............................................................................................................................................17
Chapter V Commissioning and Operation.................................................... 18
5.1 Operation state............................................................................................................................................................18
5.1.1 Automatic startup................................................................................................................................................19
5.2 Startup and shutdown...............................................................................................................................................19
5.2.1 Check before startup ..........................................................................................................................................19
5.2.2 Startup steps.........................................................................................................................................................20
5.2.3 Shutdown steps....................................................................................................................................................20
5.2.4 Emergency shutdown.........................................................................................................................................20
Chapter VI Operation Control Display Panel.................................................. 22
6.1 Operation instructions ..........................................................................................................................................................22
6.1.1 Main interface of monitoring startup...................................................................................................................22
6.1.2 Interface of main wiring diagram ..........................................................................................................................22
6.1.3 Login interface............................................................................................................................................................23
6.1.4 System information interface..................................................................................................................................23
6.1.5 Interface of event records........................................................................................................................................24
6.2 Setting information................................................................................................................................................................24
6.2.1 Monitoring parameter interface.............................................................................................................................24
6.2.2 System parameter interface ....................................................................................................................................25
6.2.3AC parameter interface..............................................................................................................................................25
6.2.4DC parameter interface .............................................................................................................................................26
6.2.5Parameter diagnosis interface .................................................................................................................................27
6.2.6Local strategy interface..............................................................................................................................................28
6.2.7Control state interface ...............................................................................................................................................28
6.2.8Startup and shutdown interface..............................................................................................................................29
Chapter VII Communication Mode .......................................................... 30
7.1Communication interface ......................................................................................................................................................30
7.1.1RS485 serial port .........................................................................................................................................................30
7.1.2Ethernet port................................................................................................................................................................31
7.1.3Communication with BMS ........................................................................................................................................32
7.2 Monitoring system structure ...............................................................................................................................................32
Chapter VIII Maintenane and Preservation ................................................... 34
8.1Operation environment requirements ...............................................................................................................................34
8.2Electrical and fixed connection inspection........................................................................................................................34
8.3Clearing and cleaning.............................................................................................................................................................34
Appendixes................................................................................ 35
Appendix 1: Fault information of Bi-directional Hybrid Storage Inverter.......................................................................35
Appendix 2: Quality assurance and after-sales service .......................................................................................................35
Installation Records ........................................................................ 37

Chapter I Overview
1.1 Model definition
This section introduces product model definition in this user's manual, as shown in Fig. 1-1:
Fig.1-1 Product model definition
For example:
PWG2-100K: 100kW Bi-directional Hybrid Storage Inverter
1.2 Symbolic interpretation
Danger
This instruction indicates that there is a safety risk during operation. If this kind of warning information is not followed, it will
directly result in a serious human casualty accident.
Warning
This instruction indicates that there is a potential risk during operation. If this kind of warning information is not followed, it
might result in a serious human casualty accident.
Attention
This instruction indicates that there is a potential risk during operation. If this kind of warning information is not followed, it
50K/100K-EX
PWG2
Bi-directional Hybrid Storage Inverter
Power rating: 50K/100K

might result in device damage.
1.3 System application
As shown in Fig.1-2, energy storing power generation system is composed of battery or PV, storage inverter and AC
distribution unit. Batteries or PV are input to the storage inverter after series-parallel connection of unit. Storage
inverter outputs it to AC distribution unit. It operates in different modes according to the need.
Storage inverter plays a core role in the whole system and is characterized with high conversion efficiency, wide
range input voltage, rapid on/off-grid switching and convenient maintenance. It has a complete protection function
(such as islanding protection, DC overvoltage protection, AC overvoltage-under-voltage protection, over
frequency-under frequency protection, inverted sequence protection and output overload protection) and can
meet on/off-grid operation requirements. The input side of storage inverter is single route input, its output side is
set with an isolation transformer, and it can conduct low-voltage on-grid.
Battery
bank PCS Grid
DC
distribution
box
AC
distribution
box
PV Load
Fig.1-2 Energy storing system diagram
The battery bank can be accumulator or lithium battery, but the mixed use of different kinds of batteries is forbidden. The DC
voltage must be higher than the required lowest value, otherwise the PCS will not operate normally.
Danger
There is deadly high voltage between the anode and cathode of battery bank, and make sure the disconnection between
the battery bank and PCS when servicing the equipment.

Warning
The frame of photovoltaic array should be ground connection to make sure the safety of operating personnel.
When the photovoltaic array is exposed to light, it supplies a DC voltage to the PCS.
Warning
To be in compliance EN61000-3-11, the product shall be connected only to a supply of the system impedance: ∣Zsys∣
=0.191 ohms or less. Before connect the product to public power network, please consult your local power supply
authority to ensure the power network meet above requirement.
Attention
Ensure all wiring is correctly selected and erected in accordance with AS 3000 wiring regulation.
Make sure the neutral conductor of the Grid and load via stand-alone port shall not interrupt.
Make sure the neutral conductor of the Grid and load shall be bonding to earth via earth bar.
Battery
Bank
PCS
Solar
Array
A
B
C
N
PE
U
V
W
Essential
Loads
Grid
Max output
100000VA
N
PE
Neutral bar
MEN
connect
Earth bar
Essential Supply
Grid Supply
Earth
electrode
CT
Over current
protection
Fig.1-3 Connection diagram of the energy storing system
1.4 Operation model
The Bi-directional Hybrid Storage inverter can operate in on-grid model and off-grid model. When the inverter
works in on-grid model, it can trace the amplitude and phase of grid voltage faultlessly. And if the DC source is

battery, the Bi-directional inverter can transfer energy form grid to batteries. When the inverter works in off-grid
model, the output is fixed amplitude and frequency voltage.
1.5 Safety instructions
This user’s manual is about installation and use of Sinexcel PWG2 series 50KW/100KW storage inverter.
Before installation, please read this user’s manual carefully.
Storage inverter must be commissioned and maintained by the engineers designated by the manufacturer or the
authorized service partner. Otherwise, it might endanger personal safety and result in device fault. Any damage
against the device caused thereby shall not be within the warranty scope.
Storage inverter is only used for commercial/industrial purposes, and it cannot be used as an energy saving device
related to life support device.
Danger
Any contact with copper bar, contactor and terminal inside the device or connected with the loop of power grid might result in
burning or fatal electric shock.
Don’t touch any terminal and conductor connected with the loop of power grid.
Pay attention to any instruction and safety documents about power on-grid.
Warning
There might be an electric shock risk inside the device!
Any operation related to this device will be conducted by professionals.
Pay attention to the safety precautions listed in safety instruction and installation documents.
Pay attention to the safety precautions listed in user’s manual and other documents.
Warning—large leakage current
Before connecting input power supply, please ensure that the grounding is reliable.
The device grounding must comply with the local electric codes.
Warning
When storage battery is connected to storage inverter, there is DC voltage at input port. Please pay attention to it during

operation.
Warning
Don’t touch electric parts within 15 minutes after power outage!
There is dangerous energy in capacitance storage. Don’t touch device terminal, contactor and cooper bar and other
electric parts within 15 minutes after disconnecting all device power supplies.
Attention
All maintenance and preservation inside the device require using tools and shall be conducted by trained personnel. The
components behind the protective cover plate which are opened by tools cannot be maintained by users.
Please read this user’s manual before operation.
1.6 Precautions
1.6.1 Personnel requirements
The storage inverter is only commissioned and maintained by the engineers designated by the manufacturer or the
authorized service partner. Otherwise, it might endanger personal safety and result in device fault. Any damage
against the device caused thereby shall not be within the warranty scope.
1.6.2 Equipment use scope
The storage inverter is only used for commercial/industrial purposes, and it cannot be used as an energy saving
device related to life support device.
1.6.3 Cabinet label
Cabinet label contains important information for safe operation of cabinet. Don’t tear it up or damage it. S
Ensure that the cabinet label is clear and readable. If it is damaged or obscure, please replace it immediately.
1.6.4 Description
To facilitate users to use this manual more conveniently, a lot of pictures have been provided in the manual. The
pictures can be only used for explanative and schematic purposes. As for product details, the real product shall

prevail.

Chapter II Introduction to PCS-AC, PCS-DC and STS Modules 1
Chapter II Introduction to Modules
2.1 Overall dimension of PCS-AC module
Fig.2-1 is a diagram for overall dimension of PCS-AC module case and installation hole.
Fig.2-1 Overall dimension and installation diagram for PCS-AC module
Fig. 2-2 is 3D view for front panel of PCS-AC module.
Position
Description
1
Normal
indicator light
2
Fault indicator
light
3
Hanger
4
Handle
5
Communication
cable
6
Power supply
cable
Fig. 2-2 Front 3D view for PCS-AC module

2 Chapter II Introduction to PCS-AC, PCS-DC and STS Modules
2.2 Overall dimension of PCS-DC module
Fig.2-3 is a diagram for overall dimension of PCS-DC module case and installation hole.
Fig. 2-3 Overall dimension and installation diagram for PCS-DC module
Fig. 2-4 is 3D view for front panel of PCS-DC module.

Chapter II Introduction to PCS-AC, PCS-DC and STS Modules 3
Fig. 2-4 Front 3D view for PCS-DC module
Position
Description
1
Normal
indicator light
2
Fault indicator
light
3
Hanger
4
Handle
5
Communication
cable
6
Power supply
cable
Warning
The handle on the front panel of the module cannot bear the load.
The front panel of PCS-AC module has two LED lights, namely one green (Normal) light and one red (Alarm) light.
When the device is in standby state, the green light (Normal) flickers once every 1s. When the device is in sleep state,
green and red lights are off. When the device is in normal operation, the green light (Normal) is always on. When the
device has a fault warning, the red light (Alarm) will be always on or flicker.

4 Chapter III Introduction to System
Chapter III Introduction to System
3.1 System composition
PWG2-50K/ 100K Bi-directional Hybrid Storage Inverter is composed of 1 or multiple set(s) of PCS-DC and
PCS-AC modules. The modules identify master-slave systems through the dial-up codes on the panel. #1 is a master
system, while other modules track the master system. The Bi-directional Hybrid Storage Inverter cabinet is
equipped with lightning protector, AC/DC breaker and distribution units. If on/off-grid switching is to be achieved,
extra power distribution unit (STS) needs to be added. Fig.3-1 is a topological graph for its composition and
structure.
Fig.3-1 Topological graph for Bi-directional Hybrid Storage Inverter
Main composition of Bi-directional Hybrid Storage Inverter cabinet is shown in Fig.3-1.
Table 3-1 Main composition of Bi-directional Hybrid Storage Inverter cabinet
Serial
No.
Name
Quantity
Remark
1
Cabinet
plane
The cabinet is equipped with
distribution components.
2
PCS-AC
1~2
set(s)
50KW 1 set; 100KW 2 sets;
3
PCS -DC
1~2
set(s)
50KW 1 set; 100KW 2 sets;

Chapter III Introduction to System 5
4
Isolation transformer
1 set
5
Power Management Unit
1 set
It is installed in the cabinet door.
3.2 Technical parameters
Table 3-2 is detailed parameters for Bi-directional Hybrid Storage Inverter.
Table 3-2 Technical parameters
parameters
PWG2-50K
PWG2-100K
PV input quantities:
Vmax PV
900 d.c. V
900 d.c. V
PV input operating voltage range
520~900 d.c. V
520~900 d.c. V
Maximum operating PV input current
192 d.c. A
384 d.c. A
Isc PV
225 d.c. A
450 d.c. A
Max inverter backfeed current to the array
5A
5A
a.c. output quantities
Voltage (nominal)
400 a.c. V
400 a.c. V
Current (maximum continuous)
72 a.c. A
144 a.c. A
Current (inrush)
86 a.c. A
172 a.c. A
Frequency (nominal)
50/60 Hz
50/60 Hz
Power (maximum continuous)
50000 W
100000 W
Power factor range
±0.8
±0.8
Maximum output fault current
200 a.c. A
400 a.c. A
Maximum output overcurrent protection
86 a.c. A
172 a.c. A
a.c. input quantities
Voltage (nominal)
400 a.c. V
400 a.c. V
Current (maximum continuous)
151 a.c. A
303 a.c. A
Current (inrush)
181 a.c. A
363 a.c. A
Frequency
50/60 Hz
50/60 Hz
d.c. input (other than PV) quantities
Voltage (range)
250~520 d.c. V
250~520 d.c. V
Nominal battery voltage
450 d.c. V
450 d.c. V
Current (maximum continuous)
130 d.c. A
260 d.c. A
d.c. output quantities
Voltage
250~520d.c. V
250~520 d.c. V
Nominal battery voltage
450 d.c. V
450 d.c. V
Current (maximum continuous)
130 d.c. A
260 d.c. A

6 Chapter III Introduction to System
Protective class
Ⅰ
Ⅰ
Ingress protection (IP) rating per part 1
IP 20
IP 20
Note: (1) If DC voltage exceeds 520V, it might cause PV input to fail to operate at the best MPPT point.
3.3 Overall dimension
The overall dimension of Bi-directional Hybrid Storage Inverter is shown in Fig.3-2. Cabinet width: 800mm, height:
2,160mm (without ring); depth: 800mm.
故障/FAULT
电源/POWER 运行/RUN
EPO
2160
800800
Fig. 3-2 Overall dimension of Bi-directional Hybrid Storage Inverter
3.4 Description
The appearance of storage inverter is shown in Fig.3-3. Screen body is mainly composed of touch screen, normal
indicator light, alarm indicator light and emergency shutdown button etc.
故障/FAULT
电源/POWER 运行/RUN
EPO
4
1
2
3
5
Position
Description
1
Power indicator
light
2
Fault indicator light
3
Normal indicator
light
4
Emergency
shutdown button

Chapter III Introduction to System 7
5
Touch screen
Fig. 3-3 Appearance diagram for Bi-directional Hybrid Storage Inverter
Taking PWG2-100K as an example: After opening the front door, the internal plane layout is shown in Fig.3-4. Main
components include module, AC/DC breaker and lightning protector.
Position
Description
1
PCS-DC (1~2 module(s))
PCS-AC (1~2 module(s))
2
PV DC switch
3
Battery switch
4
AC breaker (load)
Fig.3-4 Internal plane layout diagram for Bi-directional Hybrid Storage Inverter
1
2
4
3

8 Chapter IV Device Installation
Chapter IV Device Installation
4.1 Transport and storage
Cabinet and module of Bi-directional Hybrid Storage Inverter are packed separately in the packing cases. That is,
multiple modules and a cabinet packed separately in the packing cases. During device transport and storage, pay
attention to the logo on the packing case.
Bi-directional Hybrid Storage Inverter is modularly designed so as to facilitate device positioning and transport. The
selection of storing position should ensure that:
There is no corrosive gas around it.
There are over-wetting and high-temperature sources.
It is not a dusty environment.
It complies with the firefighting requirements.
Attention
During transport and storage, three modules can be stacked at most.
The front of module packing case (the side with “Bi-directional Hybrid Storage Inverter” printed) should be placed
upwards. Keep it upright.
During cabinet transport and storage, stacking is not allowed. The device top cannot be placed with other articles.
The cabinet should be placed vertically at forward direction. Don’t keep it upright place it horizontally.
4.2 Removal
When removing the module of Bi-directional Hybrid Storage Inverter which is not unpacked from packing case, a
forklift can be used to remove the whole case.
Users can lift the device bottom with a forklift or remove the cabinet of single Bi-directional Hybrid Storage Inverter
through the lifting hole on its top with a crane. It can be transported alone. Refer to Fig. 4-1.