Sinexcel PWS2-30M-EX User manual

PWS2-30M-EX
Energy Storage Inverter
User's Manual
Shenzhen Sinexcel Electric Co., Ltd.

User’s Manual
Sinexcel PWS2-30M-EX Energy Storage Inverter
Data version: A05
Filed in: Feb 21, 2019
Applicable to: PWS2-30M-EX
Shenzhen Sinexcel Electric Co., Ltd. (“Sinexcel”) provides its customers with all-around
technical support. Users can contact local Sinexcel 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 should be without prior notice.
Shenzhen Sinexcel Electric Co., Ltd.
Website: www.sinexcel.com
Add: Building 6, Area 2, Baiwangxin High-tech Industrial Park, No. 1002, Songbai Road,
Nanshan District, Shenzhen, China
Postcode: 518055
Hotline: [phone]
Fax: [phone]
E-mail: [e-mail]

CONTENT
CHAPTER 1 OVERVIEW __________________________________________ - 1 -
1.1 MODEL DEFINITION__________________________________________________ - 1-
1.2 ICON INTERPRETATION _______________________________________________ - 1-
1.2.1 Icons in the manual ____________________________________________- 1 -
1.2.2 Inverter prompt icons___________________________________________- 2 -
1.3 SAFETY INSTRUCTIONS ______________________________________________ - 2-
1.3.1 Safety instructions for mechanical installation________________________- 3 -
1.3.2 Safety instructions for electrical connection _________________________- 3 -
1.3.3 Safety instructions for inverter operation____________________________- 4 -
1.3.4 Safety instructions for maintenance and replacement _________________- 4 -
1.3.5 Others ______________________________________________________- 5 -
1.4 PRECAUTIONS _____________________________________________________ - 6-
1.4.1 Personnel requirements_________________________________________- 6 -
1.4.2 Purposes of usage_____________________________________________- 6 -
1.4.3 Label on enclosure ____________________________________________- 6 -
1.4.4 Notes _______________________________________________________- 6 -
CHAPTER 2 INTRODUCTION TO ENERGY STORAGE SYSTEM __________ - 7 -
2.1 SYSTEMAPPLICATION________________________________________________ - 7-
2.1.1 System structure diagram _______________________________________- 7 -
2.2 OVERALL DIMENSION ________________________________________________ - 8-
2.3 APPEARANCE _____________________________________________________ - 8-
2.4 TECHNICAL PARAMETERS _____________________________________________ - 9-
2.5 TECHNICAL SPECIFICATION___________________________________________ - 10 -
2.5.1 Principle description___________________________________________- 10 -
2.5.2 Function description___________________________________________ - 11 -
2.5.3 De-rating ___________________________________________________- 12 -
CHAPTER 3 EQUIPMENT TRANSPORT, STORAGE AND INSTALLATION__ - 15 -
3.1 TRANSPORTAND STORAGE___________________________________________ - 15 -
3.2 INSTALLATION FLOW ________________________________________________ - 16 -
3.3 OPEN-CASE INSPECTION ____________________________________________ - 17 -
3.4 MODEL CHECK AND PREPARATION ______________________________________ - 17 -
3.5INSTALLATION REQUIREMENTS ________________________________________ - 18 -
3.6 ELECTRICAL CONNECTION ___________________________________________ - 18 -
3.7 CHECK AFTER INSTALLATION__________________________________________ - 25 -
3.7.1 Cable connection check________________________________________- 25 -
3.7.2 Electric and communication check _______________________________- 25 -
CHAPTER 4 DEBUG AND OPERATION _____________________________ - 28 -
4.1 STARTUP AND SHUTDOWN ___________________________________________ - 28 -

4.1.1 Check before startup __________________________________________- 28 -
4.1.2 Startup steps ________________________________________________- 28 -
4.1.3 Shutdown steps ______________________________________________- 28 -
4.2 MONITORING INTERFACE INFORMATION_____________________________________ - 29 -
4.3 CONTROL METHOD ___________________________________________________ - 31 -
CHAPTER 5 COMMUNICATION MODE______________________________ - 33 -
5.1 COMMUNICATION INTERFACE _________________________________________ - 33 -
5.1.1 RS-485 interface _____________________________________________- 33 -
5.1.2 Ethernet interface ____________________________________________- 33 -
5.2 BMS COMMUNICATION______________________________________________ - 34 -
5.3 MONITORING SYSTEM STRUCTURE _____________________________________ - 34 -
CHAPTER 6 MAINTENANCE______________________________________ - 36 -
6.1 OPERATION ENVIRONMENT REQUIREMENTS_______________________________ - 36 -
6.2 ELECTRICALAND FIXED CONNECTION INSPECTION__________________________ - 36 -
6.3 CLEARING AND CLEANING____________________________________________ - 36 -
APPENDIXES __________________________________________________ - 37 -

- 1 -
Chapter 1 Overview
1.1 Model definition
The model definition of PWS2-30M-EX energy storage inverter is shown in Fig. 1-1:
PWS2 - 30M - EX
For Europe and Australia
Rated power:30kW
M: For modular design
Wide battery voltage-supported
energy storage inverter
Fig. 1-1 Model definition
1.2 Icon interpretation
This user’s manual is about installation and use of Sinexcel PWS2-30M-EX energy storage
inverter.
To ensure personal and property safety or use this product efficiently, please read this
user’s manual carefully before installation and use.
1.2.1 Icons in the manual
The following are the examples for iconsin this user’s manual. Please read and understand
the definition of each icon.
DANGER
The DANGER icon 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
The WARNING icon 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.
CAUTION
The CAUTION icon indicates that there is a potential risk during
operation. If this kind of warning information is not followed, it might
result in device damage.
The NOTE icon indicates the additional information in the manual and
a highlight and supplement for the content. It provides skills and tips of
product usage and can help you efficiently solve some problems in

- 2 -
application.
1.2.2 Inverter prompt icons
The following are the examples for icons on the inverter. Please read and understand the
definition of each icon.
10min
This icon indicates that internal conductive device can be touched
by waiting for 10 minutes after inverter and power grid are
disconnected from storage battery.
This icon indicates that the inverter surface is hot during operation.
Keep cautious. Don’t touch the inverter surface.
This icon indicates that before any operation of the inverter, please
read this product manual carefully.
The ELECTRICAL DANGER icon indicates that only professional
and qualified personnel can carry out equipment installation and
electric operation.
1.3 Safety instructions
PWS2-30M-EX energy storage inverter is designed and tested in strict accordance with
relevant international safety standards. Its installation, trial operation, operation and
maintenance should comply with safe operation specifications of electrical and electronic
equipment. Incorrect use or wrong operation might endanger operator or a third party and
destroy the inverter or other properties. To prevent the above circumstances from
happening, the following precautions should be strictly abided by in the process of
operation and maintenance. The detailed description will be provided in relevant chapter.
WARNING
All installation, debugging and maintenance should be completed by
professionals. Professionals should:
be approved engineer by the factory or its agent;
be professionally trained;
fully read this manual and learn about safe operation matters for
electrical and electronic equipment;
be familiar with relevant safety specification of electric system.
Professionals who meet the above conditions can:

- 3 -
(1) Install the inverter;
(2) Setup energy storage system as per customer’s requirement;
(3) Conduct trial operation of energy storage system;
(4) Operate, debug and maintain energy storage system.
CAUTION
Equipment wrong operation might cause injury!
Removal and placement of the inverter should abide by the
description in this manual.
Improper equipment operation might cause electric shock, burn or
contusion.
Any system (equipment) damage caused by modification and
disassembly without permission does not fall into the warranty scope.
1.3.1 Safety instructions for mechanical installation
DANGER
Before inverter installation, ensure that the inverter does not have any
electric connection.
CAUTION
Poor ventilation for installation will weaken the system performance!
During equipment operation, the ventilation should be good. The
equipment should be upright, and there should be no strong air current
to prevent airflow so as to ensure that the device is cooled well.
1.3.2 Safety instructions for electrical connection
DANGER
Be careful in electric connection. There is dangerous voltage between
the two poles of storage battery. Don’t touch the metal terminal when
there is no sufficient protection.
CAUTION
The cables used in energy storage system must be connected firmly
and with good insulation and proper specification.
CAUTION
All electrical installations should meet national/regional electrical
standards;
Grid-tied operation can be conducted after permission is obtained from
local national/regional electric power department.

- 4 -
Before power-on, please ensure that it is reliably grounded and the
grounding meets local electrical standards.
1.3.3 Safety instructions for inverter operation
DANGER
Any contact with copper bar, uncovered contact spot or terminal inside
the device that is connected to the loop of power grid might result in
burning or fatal electric shock.
Don’t touch any terminal and conductor connected with the power
grid.
Pay attention to any instruction and safety documents about grid
connection.
WARNING
There might be an electric shock risk inside the device! When the
inverter operates or is electrified, don’t open the enclosure
of the
inverter.
Only intact and closed cabinet can protect operator’s personal and
property safety.
Any operation related
to this device will be conducted by
professionals.
Pay attention to the safetyprecautions listed in this manual and other
documents.
When AC of the inverter is loaded, DC disconnection is not allowed. If
disconnection is required, shutdown operation should be conducted
first. After the AC load isolation switch of the inverter is disconnected
and it is confirmed that there is no voltage at the AC terminal of the
inverter, DC connection can be turned off.
CAUTION
During inverter operation, the ventilation duct must not be blocked.
1.3.4 Safety instructions for maintenance and replacement
DANGER
Improper equipment maintenance and operation might cause personal
injury or equipment damage. Before any operation, users should
strictly abide by the following steps:
Disconnect theAC isolation switch between the power grid and the

- 5 -
inverter, and then turn off DC breaker of the battery box.
Wait for at least 10 minutes until internal energy storage elements
are discharged off. During this period, don’t touch equipment terminal,
contact spot, copper bar and other electric parts with body or
conductor.
Use detecting device to check and ensure that there are no voltage
and current on the device.
CAUTION
Stop irrelevant personnel from entering the maintenance site!
During electrical connection and maintenance, temporary warning
signs should be
pasted and barriers should be set up to prevent
irrelevant personnel entering electrical connection or maintenance
area.
CAUTION
The inverter can be restarted only after its malfunction affecting safety
performance is removed.
Power can be supplied again after the inverter is fully disconnected for
1 minute.
There are no serviceable parts in the inverter. If any maintenance is
required, please contact our after-sales personnel.
CAUTION
Don’t replace the internal elements at will. Otherwise, our company will
not undertake any quality guarantee and joint liability for any losses
caused thereby.
CAUTION
Components might be caused by any contact with PCBs or other
electrostatic sensitive components or improper operation.
Don’t touch the circuit boards.
Abide by electrostatic protection specifications and wear anti-static
wrist strap.
1.3.5 Others
WARNING
Safety signs, warning label and nameplate on the inverter:
Must be clearly visible;
Should not be removed or covered.

- 6 -
1.4 Precautions
1.4.1 Personnel requirements
Energy storage inverter must be debugged and maintained by the engineers designated
by the manufacturer or its agent. Otherwise, it might endanger personal safety and result
in device fault.Anydamage against the device caused thereby will not fall into the warranty
scope.
1.4.2 Purposes of usage
Energy storage inverter is only used for commercial/industrial purposes, and it cannot be
used as an energy saving device related to life support device.
1.4.3 Label on enclosure
The label on enclosure contains important information for safe operation to the inverter.
Don’t tear or damage it.
The label on enclosure should be clear and readable. If it is damaged or becomes vague,
please replace it.
1.4.4 Notes
To help users read this manual more conveniently, a lot of pictures are provided in this
manual. Such pictures are onlyused for description and indication. For detailed information,
please refer to the product itself.

- 7 -
Chapter 2 Introduction to energy storage system
2.1 System application
As shown in Fig. 2-1, the energy storage system set up by PWS2-30M-EX is composed of
battery (pack), energy storage inverter, intelligent (or manual) power distribution unit, EMS
and BMS. Battery pack is connected to energy storage inverter. Energy storage inverter is
connected with the load and power grid through intelligent (or manual) power distribution
unit. Energy storage inverter communicates with EMS through Ethernet interface (or RS-
485 interface) to indirectly control charging and discharging of battery pack. EMS
communicates with energy storage inverter, BMS and/or intelligent electric meter through
RS-485 interface to dispatch the energy of an energy storage system.
2.1.1 System structure diagram
The structure diagram of energy storage system is shown below. PWS2-30M-EX energy
storage inverter pushes the data to EMS or other host systems in real time.
The Intelligent power distribution unite is a remote controllable disconnector. A manual
switch can also work. This component is used to isolate the grid when the system needs
to run in off-grid mode.
Energy Management
System
Intelligent Power
Distribution Unit
or manual switch
Grid
Ethernet/RS-485
Energy Storage Inverter
Battery and
Industrial Load
Battery Management
System
RS-485 Communication
Fig. 2-1 Structure of energy storage system

- 8 -
2.2 Overall dimension
Overall dimension of PWS2-30M-EX is shown in Fig.2-2.
Fig. 2-2 Overall dimension of PWS2-30M-EX (unit: mm)
2.3 Appearance
The appearance of PWS2-30M-EX is shown in Fig.2-3.
Fig. 2-3 Appearance of front side of PWS2-30M-EX
SN Name Description
1 Positive DC port To connect positive power cables to the battery cabinet
2 Negative DC port To connect negative power cables to the battery cabinet
3 Knob Pulling module can’t be used for bearing
4 DC protection shell fixing
point For DC terminal protection case fixing

- 9 -
5 Communication interfaces Including RS-485, EPO
6 Internet port Ethernet
7 Running lights Lights on during normal operation
8 Fault indicator Lights on during abnormal running
9 Monitor screen Display monitoring content
10 AC breaker Safety device to connect or disconnect the current in
AC port.
11 AC protection shell fixing
point For AC terminal protection case fixing
12 AC port To connect AC power cables
13 Ground port To connect ground protection point.
14 Air outlet Ventilation duct exit for heat dissipation
2.4 Technical parameters
Technical parameters of PWS2-30M-EX energy storage inverter:
Table 2-1 Technical parameters
Product Model PWS2-30M-EX
DC PORT - BATTERY
Battery Voltage Range 200~750V
DC.Max Current 90A
DC.Max Power 33kW
AC GRID-TIE PARAMETER
Rated Output Power 30kW
Rated Voltage 400V
Voltage Range -20%~+15%
Rated Frequency 50Hz
Frequency Range -2.5~+1.5Hz
AC.Rated Current 43.3A
Output THDi ≤3%
Power Factor 0 leading~0 lagging
AC OFF-GRID PARAMETER

- 10 -
Voltage 380/400V
Voltage Adjustable Range ±5%
Frequency 50Hz
Output THDu ≤1%(Linear load)
Output THDu ≤5%(Nonlinear load)
SYSTEM PARAMETER
Peak Efficiency 97.1%
Wiring Mode 3P3W+PE, 3P4W+PE
Isolation Mode No-isolation
Cooling Forced air cooling with
replaceable fan module
Noise 60dB
Working Temp. -20℃~60℃(de-rating in case of exceeding 45°C)
IP Degree IP20
Max Elevation 4000M(de-rating in case of exceeding 2,000m)
Humidity Range 0~95%
Size (W*D*H) 440*550*173mm
Weight 30kg
Type of battery Lithium battery, lead-acid battery
COMMUNICATION
Display LCD Screen
Communication Protocol Modbus TCP/IP, MESA
Communication Socket Ethernet、RS485
2.5 Technical specification
2.5.1 Principle description
There are three operation modes: grid-tied discharging, charging and off-grid discharging.
When the battery voltage connected to PWS2-30M-EX is within the preset normal voltage
range, the inverter can operate under grid-tied discharging, charging and off-grid
discharging. If the inverter is in discharging state, the DC power supply of the battery can
be inverted into 3-phase AC power supply. If the inverter is in charging state, the 3-phase
AC power energy of the power grid can be stored into battery (pack).
The protection circuit of the inverter is used to ensure safe operation of the inverter and
operators’ safety.
CAUTION
Energy storage inverter without built-in isolation transformer.
If the capacity of the energy storage device doesnot meet the demand,
multiple parallel connections can be made. Each inverter is equipped
with a suitable battery capacity on the DC side and the AC side is

- 11 -
connected to the grid in parallel.
2.5.2 Function description
The functions of PWS2-30M-EX are as follows:
Grid-tied discharging: The inverter is in inverting state, converts DC intoAC that meets the
requirement of power grid department in installation region, and feeds the energy back to
the power grid.
Grid-tied charging: The inverter is in rectification state and transmits 3-phaseAC to charge
the battery (pack) by the set charging mode.
Off-grid discharging: The inverter is in inverting state, converts DC intoAC that meets the
requirement of power grid department in installation region, and provides power supply for
3-phase load in the micro-grid.
Data storage and display: Storage and operation information, operation record and failure
record are displayed on the LCD screen.
Communication function:
Standard RS-485 interface can be connected with monitoring device such as EMS,
BMS.
Standard Ethernet interface is used to communicate with upper computer to realize
such functions as remote control and remote software upgrading.
Reactive power configuration: Regulate the reactive power of the storage system.
FVRT: frequency/voltage ride-through, this function can be enabled or disabled, for
more information, please refer to UL1741 Supplement A or other similar rules about
Utility-Interactive Distribute Generators.
Soft-Start/Reconnection ramp rate: This function will apply when system suspend
happens caused by utility voltage abnormal, and reconnect after utility restore normal.
The default value is 2, twice of rated power per second, which means within 0.5
seconds the system restores to full output.
Anti-Islanding:enable or disableanti-islandingfunction.Formoreinformation,please
refer to UL1741 SupplementA or other similar rules about Utility-Interactive Distribute
Generators.
Volt/Watt:Available when activated and operating in discharge mode. When the
actual voltage is above the point, the active powerwill be regulated with the ramp rate.
The ramp rate is defined as multiple of set active power per 1% of rated voltage that
above the Volt/Watt point.
Volt/VAR: Available when activated and operating in discharge mode. In this mode,
Reactive power as a function of grid voltage. In Volt/Var mode, the Q configuration is

- 12 -
disabled.
Freq/Watt:Available when activated and operating in discharge mode. When the
actual frequency is above the point, the active power will be regulated with the ramp
rate. The ramp rate is defined as multiple of set active power per hertz that above the
above the Freq/Watt point.
PF regulate: Regulate the PF of the entire storage system.
Protection function:
Overcurrent protection
Overload protection
Short circuit protection
Environment over-temperature protection
Over-temperature protection of power module
Ground leakage current monitoring
Grid voltage monitoring
Grid frequency monitoring
Anti-islanding protection
Monitoring ofAC output current and DC component
Battery overcharge protection
Battery over-discharge protection
VDE certified redundancy protection
Grid support function:
Grid over/under frequency drop active power function
Grid over/under voltage drop active power function
Grid over/under voltage regulation reactive power function
Active power regulation power factor curve function
Power ramping after grid fault recovery
2.5.3 De-rating
The de-rating of inverter is to avoid inverter overload or restrain potential faults. The
inverter might conduct de-rating operation in the following operating conditions:
Internal over-temperature (including environment temperature and module
temperature)

- 13 -
Grid under-voltage
Battery under-voltage
Remote power dispatching
Over-temperature de-rating
Over-high environment temperature and ventilation duct blocking will cause de-rating of
inverter. Over-temperature de-rating regulation is as follows:
If power device temperature reaches the upper limit, the inverter will automatically
decrease the input and output power. After the power device temperature is restored
to the normal range, the inverter will gradually increase the set value.
When the environment temperature in the inverter exceeds the upperlimit, the inverter
will automatically power off so as to protect the inverter.
The lower limit of over-temperature de-rating is about 66% of rated
power. If the de-rating reaches the lower limit but the temperature is
not improved, the inverter will shut down automatically.
Grid under-voltage de-rating
If the grid voltage is too low, the inverter will limit the grid current to a specified range
through de-rating. The de-rating of grid under-voltage will be activated when 3-phase grid
voltage reaches 360V. The curvilinear relationship for grid voltage de-rating is as follows:
min
[ 360 ]
( 360 )
V V n grid
P PV V= ×
Working
Zone
n
P
min
V
max
V
360V
Fig.2-4 Grid under-voltage de-rating
Battery under-voltage de-rating
If the battery voltage is too low, the inverter will limit the battery discharge current to a
specified range through de-rating. The de-rating of battery under-voltage will be activated
when the battery voltage reaches 350V. The curvilinear relationship for battery voltage de-
rating is as follows:

- 14 -
Working
Zone
n
P
min
V
max
V
350V
Fig.2-5 Battery under-voltage de-rating
External command de-rating
The inverter can regulate the de-rating of output active and reactive power by remote grid
dispatching command. The operation state of the inverter will be displayed on the screen.

- 15 -
Chapter 3 Equipment transport, storage and installation
3.1 Transport and storage
During transport and storage of inverter module, pay attention to the packing label on
enclosure. Transport and storage should meet the following requirements:
Don’t dismantle external package of the inverter.
Ensure there is no corrosive gas nearby.
Storage temperature is maintained between -40℃~65℃, and relative humidity is
maintained between 0%RH~95%RH.
Dusty environment is not allowed.
3 layers are stacked at most.
During storage, regular inspection should be conducted. If the packing material is
damaged by worms or rats, it should be replaced in time.
The storage location complies with firefighting requirement.
After long-term storage, the inverter needs to be checked and tested by professionals
before use.

- 16 -
3.2 Installation flow
Start
Unpack & Inspect
Read manual
Install now? Store
Select installation
location
Transport
Install
Electrical connection
Inspect before
operation
Trial operation
Debug
Operates
Nomarlly?
End
N
Y
N
Y
Fig. 3-1 Flow chart for installation