Sinexcel PWS2-29P-EX User manual

PWS2-(29P,30P)-EX
Energy Storage Converter
User's Manual
Shenzhen Sinexcel Electric Co., Ltd.

User’s Manual
Sinexcel PWS2-30P-EX / PWS2-29P-EX Energy Storage
Converter
Data version: A05
Filed in: Jan 18, 2022
Applicable to: PWS2-29P-EX、PWS2-30P-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 -
1.1 ICON INTERPRETATION _______________________________________________ - 1 -
1.1.1 Icons in the manual ____________________________________________- 1 -
1.1.2 Converter prompt icons _________________________________________- 2 -
1.2 SAFETY INSTRUCTIONS ______________________________________________ - 2 -
1.2.1 Safety instructions for mechanical installation ________________________- 3 -
1.2.2 Safety instructions for electrical connection _________________________- 3 -
1.2.3 Safety instructions for converter operation __________________________- 4 -
1.2.4 Safety instructions for maintenance and replacement _________________- 5 -
1.2.5 Others ______________________________________________________- 6 -
1.3 PRECAUTIONS _____________________________________________________ - 6 -
1.3.1 Personnel requirements_________________________________________- 6 -
1.3.2 Purposes of usage _____________________________________________- 6 -
1.3.3 Label on enclosure ____________________________________________- 6 -
1.3.4 Notes _______________________________________________________- 6 -
CHAPTER 2 INTRODUCTION TO PHOTOVOLTAIC ENERGY STORAGE SYSTEM
- 7 -
2.1 SYSTEM APPLICATION________________________________________________ - 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 ___________________________________________________- 13 -
CHAPTER 3 EQUIPMENT TRANSPORT, STORAGE AND INSTALLATION__ - 15 -
3.1 TRANSPORT AND STORAGE___________________________________________ - 15 -
3.2 INSTALLATION FLOW ________________________________________________ - 16 -
3.3 OPEN-CASE INSPECTION ____________________________________________ - 17 -
3.4 CONVERTER CHECK AND PREPARATION __________________________________ - 17 -
3.5 INSTALLATION REQUIREMENTS ________________________________________ - 19 -
3.5.1 Environment requirements______________________________________- 19 -
3.5.2 Carrier requirements __________________________________________- 20 -
3.6 ELECTRICAL CONNECTION ___________________________________________ - 20 -
3.6.1 Recommended system configuration _____________________________- 20 -
3.6.2 Introduction to port of PCS _____________________________________- 21 -
3.6.3 System grounding ____________________________________________- 22 -
3.6.4 DC wiring ___________________________________________________- 23 -

3.6.5 AC wiring ___________________________________________________- 23 -
3.6.6 Connection of communication cables _____________________________- 24 -
3.6.7 Signal connection of terminal block 1 _____________________________- 27 -
3.6.8 DO and DI Interfaces (Output and input dry contacts) ________________- 28 -
3.7 CHECK AFTER INSTALLATION __________________________________________ - 28 -
3.7.1 Cable connection check________________________________________- 28 -
CHAPTER 4 CONTROL MODE AND DEBUGGING OPERATION__________ - 30 -
4.1 CONTROL METHOD_________________________________________________ - 30 -
4.1.1 Connect with Ethernet. ________________________________________- 30 -
4.1.2 Connect with WIFI (Take iPhone as an example). ___________________- 31 -
4.1.3 Connect with RS485 (Applied to EMS or BMS)______________________- 32 -
4.2 STARTUP AND SHUTDOWN ___________________________________________ - 33 -
4.2.1 Check before startup __________________________________________- 33 -
4.2.2 Startup steps ________________________________________________- 33 -
4.2.3 Shutdown steps ______________________________________________- 35 -
CHAPTER 5 COMMUNICATION MODE______________________________ - 36 -
5.1 EMS COMMUNICATION ______________________________________________ - 36 -
5.1.1 RS-485 interface _____________________________________________- 36 -
5.1.2 Ethernet interface ____________________________________________- 36 -
5.2 BMS COMMUNICATION ______________________________________________ - 37 -
5.3 COMMUNICATE WITH MPPT BOOST CONVERTER ___________________________ - 37 -
5.4 MULTIPLE PWS2-(29P, 30P)-EX CLUSTER NETWORKING ____________________ - 38 -
5.5 MULTIPLE PCS CONNECTED TO THE SAME NETWORK________________________ - 39 -
CHAPTER 6 MAINTENANCE ______________________________________ - 40 -
6.1 OPERATION ENVIRONMENT REQUIREMENTS _______________________________ - 40 -
6.2 ELECTRICAL AND FIXED CONNECTION INSPECTION __________________________ - 40 -
6.3 CLEARING AND CLEANING ____________________________________________ - 40 -
APPENDIXES __________________________________________________ - 41 -

- 1 -
Chapter 1 Overview
1.1 Model definition
Model definition:
The model definition of PWS2-30P-EX / PWS2-29P-EX energy storage converter is shown
in Fig. 1-1:
PWS2 - 29P - EX
For Europe and Australia
Rated power:29.9kW
M: For modular design
Wide battery voltage-supported
energy storage inverter
PWS2 –30P - EX
For Europe and Australia
Rated power:30kW
M: For modular design
Wide battery voltage-supported
energy storage inverter
Fig. 1-1 Product model definition
1.1 Icon interpretation
This user’s manual is about installation and use of Sinexcel PWS2-30P-EX / PWS2-29P-
EX energy storage converter.
To ensure personal and property safety or use this product efficiently, please read this
user’s manual carefully before installation and use.
1.1.1 Icons in the manual
The following are the examples for icons in 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.

- 2 -
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
application.
1.1.2 Converter prompt icons
The following are the examples for icons on the converter. 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 converter and power grid are
disconnected from storage battery.
This icon indicates that the converter surface is hot during
operation. Keep cautious. Don’t touch the converter surface.
This icon indicates that before any operation of the converter,
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.
1.2 Safety instructions
PWS2-30P-EX / PWS2-29P-EX energy storage converter 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 converter 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

- 3 -
electrical and electronic equipment;
be familiar with relevant safety specification of electric system.
Professionals who meet the above conditions can:
(1) Install the converter;
(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 converter 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.
1.2.1 Safety instructions for mechanical installation
DANGER
Before converter installation, ensure that the converter 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.
1.2.2 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.
The cables used in energy storage system must be connected firmly
and with good insulation and proper specification.

- 4 -
CAUTION
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.
Before power-on, please ensure that it is reliably grounded and the
grounding meets local electrical standards.
1.2.3 Safety instructions for converter 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
converter operates or is electrified, don’t open the enclosure of the
converter.
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 safety precautions listed in this manual and other
documents.
When AC of the converter 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 converter is disconnected
and it is confirmed that there is no voltage at the AC terminal of the
converter, DC connection can be turned off.
CAUTION
During converter operation, the ventilation duct must not be blocked.

- 5 -
1.2.4 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 the AC isolation switch between the power grid and the
converter, 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 converter can be restarted only after its malfunction affecting
safety performance is removed.
Power can be supplied again after the converter is fully disconnected
for 1 minute.
There are no serviceable parts in the converter. 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.

- 6 -
1.2.5 Others
WARNING
Safety signs, warning label and nameplate on the converter:
Must be clearly visible;
Should not be removed or covered.
1.3 Precautions
1.3.1 Personnel requirements
Energy storage converter 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. Any damage against the device caused thereby will not fall into the warranty
scope.
1.3.2 Purposes of usage
Energy storage converter is only used for commercial/industrial purposes, and it cannot be
used as an energy saving device related to life support device.
1.3.3 Label on enclosure
The label on enclosure contains important information for safe operation to the converter.
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.
1.3.4 Notes
To help users read this manual more conveniently, a lot of pictures are provided in this
manual. Such pictures are only used for description and indication. For detailed information,
please refer to the product itself.

- 7 -
Chapter 2 Introduction to photovoltaic energy storage
system
2.1 System application
As shown in Figure 2-1, the photovoltaic energy storage system built by PWS2-30P-
EX is composed of batteries (groups), converters, smart power distribution units, EMS and
BMS, MPPT boost converters, photovoltaic modules, etc. The battery pack is connected
to the energy storage device, and the energy storage device is connected to the load and
grid-connected through the intelligent power distribution unit. The energy storage device
communicates with the EMS through the Ethernet interface (or RS485 interface) to
indirectly realize the charge and discharge control of the battery pack. The photovoltaic
power generation control is carried out through RS485 communication with the MPPT
boost converter, and the EMS communicates with the energy storage device, BMS and
smart meter through RS485/Ethernet to realize the energy dispatch of the photovoltaic
energy storage system.
2.1.1 System structure diagram
The structure diagram of photovoltaic energy storage system is shown below. PWS2-30P-
EX / PWS2-29P-EX energy storage converter pushes the data to EMS & MPPT boost
converters 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.
RS485
【2】 【6】 【7】 【8】
Ethernet
/RS485
Legend：
Power cable
Communication cable
EMS Ethernet/RS485
BMS
Intelligent
power
distribution
cabinet
Industrial load
MPPT boost
converter
RS485
【1】 【3】
【5】
【4】
（1）Photovoltaic module
（2）BMS
（3）MPPT boost converter
（4）Battery
（5）EMS
（6）PWS2-30P-EX
（7）Intelligent power
distribution cabinet
（8）Grid
Fig. 2-1 Structure of energy storage system

- 8 -
2.2 Overall dimension
Overall dimension of PWS2-30P-EX / PWS2-29P-EX is shown in Fig.2-2.
Fig. 2-2 Dimensions of PWS2-30P-EX modular machine model (unit: mm)
2.3 Appearance
The appearance of PWS2-30P-EX / PWS2-29P-EX is shown in Fig.2-3.
1 2 3 4 5
7
8
9
6
Fig. 2-3 Appearance of front side of PWS2-30P-EX / PWS2-29P-EX

- 9 -
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
DC bus positive
MC4 terminal*2
4
DC bus negative
MC4 terminal*2
5
Signal interface area
External communication interface
6
AC terminal
AC wiring
7
Ground terminal
Grounding protection wire fixed point
8
handle
Extraction module, not for load-bearing
9
Vent
Fan cover and air duct vents
2.4 Technical parameters
Technical parameters of PWS2-30P-EX / PWS2-29P-EX energy storage converter:
Table 2-1 Technical parameters
DC PORT - BATTERY
Rated allowable power
30kW
Battery charge/discharge voltage range
150V-750V (350 ~ 750V full load)
Maximum charge/discharge current of battery
90A
DC bus
Rated allowable power
45kW
Input voltage range
700 ~ 830V
Maximum input current
65A
AC GRID-TIE PARAMETER
Rated output power
30kW
Maximum apparent power
33kVA
Maximum active power
33kW
Rated grid voltage
3/N/PE, 400VAC; 3/PE 480VAC
Total current harmonic distortion rate
<3%
Power factor
Listed: 0.8 ~ 1 leading or lagging
Actual: 0.1 ~ 1 leading or lagging
AC OFF-GRID PARAMETER

- 10 -
Rated output power
30kW
Maximum apparent power
33kVA
Maximum active power
33kW
Rated grid voltage
3/N/PE, 400VAC; 3/PE 480VAC
Rated grid frequency
50/60 Hz
Power factor
Listed: 0.8 ~ 1 leading or lagging
Actual: 0.1 ~ 1 leading or lagging
Overload capacity
110% ~ 120% for 10min;
120% ~ 150% 200ms
SYSTEM BASIC PARAMETERS
Module size
440*173*596mm
Net weight
33kg
Topology
Non-isolation
Heat dissipation mode
Air cooling
Altitude
4000m (derating greater than 2000m)
Pollution level of working environment
≤2
Operating temperature/humidity
-20 ℃-60 ℃ (45 ℃ derating)/0-95%
Noise
≤ 65dB
Protection level
IP20
Display/communication
Display
LED
Communication
CAN/RS485/Network Port/WIFI
Efficiency
Peak efficiency
97.30%
CEC efficiency
96.50%
Protection
Temperature protection, grid monitoring (OVP/UVP, OFP/UFP), EPO, grid reverse sequence, island protection, fan/relay fault, overload
protection, AC short circuit protection, leakage current protection
Certification
Grid-connected standard
EN50549, AS4777.2, VDE4105, G99, IEEE1547, NB/T 32004
Safety certification
IEC 62109, NB/T 32004, UL 1741
EMC
EN61000 Series
2.5 Technical specification
2.5.1 Principle description
There are four working modes: grid-connected discharge, grid-connected charging, off-grid
discharge, photovoltaic power generation scheduling.
When the battery voltage connected to PWS2-30P-EX / PWS2-29P-EX is within the preset
normal voltage range, the converter can work in four working modes: grid-tied discharge,
grid-tied charging and off-grid discharge, and photovoltaic power generation. If the
converter is in discharging state, the DC power supply of the battery can be inverted into

- 11 -
3-phase AC power supply. If the converter is in charging state, the 3-phase AC power
energy of the power grid can be stored into battery (pack). The converter can realize
photovoltaic access by connecting to the MPPT boost converter on the DC bus side, which
can transfer photovoltaic power to the battery for charging, or send photovoltaic power to
the grid.
The protection circuit of the converter is used to ensure safe operation of the converter and
operators’ safety.
CAUTION
Energy storage converter without built-in isolation transformer.
If the capacity of the energy storage device does not meet the demand,
multiple parallel connections can be made. Each converter is equipped
with a suitable battery capacity on the DC side and the AC side is
connected to the grid in parallel.
2.5.2 Function description
The functions of PWS2-30P-EX / PWS2-29P-EX are as follows:
Grid-tied discharging: The converter is in inverting state, converts DC into AC that meets
the requirement of power grid department in installation region, and feeds the energy back
to the power grid.
Grid-tied charging: The converter is in rectification state and transmits 3-phase AC to
charge the battery (pack) by the set charging mode.
Off-grid discharging: The converter is in inverting state, converts DC into AC that meets
the requirement of power grid department in installation region, and provides power supply
for 3-phase load in the micro-grid.
Photovoltaic power generation scheduling: The converter can realize photovoltaic access
through the MPPT boost converter connected to the DC bus side, and can transfer the
photovoltaic power to the battery for charging, or send the photovoltaic power to the 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.

- 12 -
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 disable anti-islanding function. For more information, please
refer to UL1741 Supplement A 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 power will 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
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 of AC output current and DC component
Battery overcharge protection
Battery over-discharge protection

- 13 -
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 converter is to avoid converter overload or restrain potential faults. The
converter might conduct de-rating operation in the following operating conditions:
Internal over-temperature (including environment temperature and module
temperature)
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
converter. Over-temperature de-rating regulation is as follows:
If power device temperature reaches the upper limit, the converter will automatically
decrease the input and output power. After the power device temperature is restored
to the normal range, the converter will gradually increase the set value.
When the environment temperature in the converter exceeds the upper limit, the
converter will automatically power off so as to protect the converter.
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 converter will shut down automatically.
Grid under-voltage de-rating
If the grid voltage is too low, the converter 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 P V V=

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

- 15 -
Chapter 3 Equipment transport, storage and installation
3.1 Transport and storage
During transport and storage of converter module, pay attention to the packing label on
enclosure. Transport and storage should meet the following requirements:
Don’t dismantle external package of the converter.
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.
5 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 converter 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