Sinexcel PWS2-30K-NA User manual

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

User’s Manual
Sinexcel PWS2-30K-NA Energy Storage Inverter
Data version: A05
Filed in: Nov. 4, 2021
Applicable to: PWS2-30K-NA
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 -
1.3SAFETY 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 __________________________ - 5 -
1.3.5 Others ________________________________________________________________ - 6 -
1.4 PRECAUTIONS ______________________________________________________________ - 6 -
1.4.1 Personnel requirements __________________________________________________ - 6 -
1.4.2 Purposes of usage_______________________________________________________ - 6 -
1.4.3 Label on housing________________________________________________________ - 6 -
1.4.4 Notes _________________________________________________________________ - 6 -
CHAPTER 2 INTRODUCTION TO ENERGY STORAGE SYSTEM _______________________ - 7 -
2.1 SYSTEM APPLICATION _________________________________________________________ - 7 -
2.1.1 System structure diagram ________________________________________________ - 7 -
2.1.2 Adaptive power grid type _________________________________________________ - 8 -
2.2 OVERALL DIMENSION _________________________________________________________ - 8 -
2.3 APPEARANCE_______________________________________________________________ - 9 -
2.4 TECHNICAL PARAMETERS ______________________________________________________ - 10 -
2.5 TECHNICAL SPECIFICATION _____________________________________________________ - 12 -
2.5.1 Principle description ____________________________________________________ - 12 -
2.5.2 Function description ____________________________________________________ - 12 -
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 MODEL CHECK AND PREPARATION________________________________________________ - 18 -
3.5 INSTALLATION REQUIREMENTS __________________________________________________ - 19 -
3.6 INSTALLATION _____________________________________________________________ - 21 -
3.7 ELECTRICAL CONNECTION _____________________________________________________ - 24 -
3.8 CHECK AFTER INSTALLATION ____________________________________________________ - 29 -
3.8.1 Cable connection check _________________________________________________ - 29 -
3.8.2 Electric and communication check_________________________________________ - 29 -
3.9 INSTALLATION OF BOTTOM COVER ________________________________________________ - 30 -

CHAPTER 4 DEBUG AND OPERATION________________________________________ - 31 -
4.1 STARTUP AND SHUTDOWN_____________________________________________________ - 31 -
4.1.1 Check before startup____________________________________________________ - 31 -
4.1.2 Startup steps __________________________________________________________ - 31 -
4.1.3 Shutdown steps________________________________________________________ - 31 -
4.2 POWER REGULATION_________________________________________________________ - 32 -
CHAPTER 5 HMI AND OPERATIONS _________________________________________ - 33 -
5.1 DESCRIPTION______________________________________________________________ - 33 -
5.2 WELCOME INTERFACE FOR STARTUP ______________________________________________ - 33 -
5.3 HOME PAGE ______________________________________________________________ - 34 -
5.3.1 Main menu ___________________________________________________________ - 34 -
5.4 ENERGY _________________________________________________________________ - 34 -
5.4.1 AC information ________________________________________________________ - 34 -
5.4.2 Battery information ____________________________________________________ - 35 -
5.4.3 Graph display _________________________________________________________ - 36 -
5.5 RECORDS ________________________________________________________________ - 36 -
5.6 CONTROL PARAMETER________________________________________________________ - 37 -
5.7 SETTINGS ________________________________________________________________ - 39 -
5.7.1 Interface of battery parameters___________________________________________ - 39 -
5.7.2 HMI parameters _______________________________________________________ - 40 -
5.7.3 Debug interface _______________________________________________________ - 41 -
5.7.4 Hardware parameters __________________________________________________ - 42 -
5.8 INVERTER INFORMATION ______________________________________________________ - 42 -
CHAPTER 6 COMMUNICATION MODE _______________________________________ - 43 -
6.1 COMMUNICATION INTERFACE___________________________________________________ - 43 -
6.1.1 RS-485 interface _______________________________________________________ - 43 -
6.1.2 Ethernet interface ______________________________________________________ - 43 -
6.2 BMS COMMUNICATION ______________________________________________________ - 44 -
6.3 MONITORING SYSTEM STRUCTURE _______________________________________________ - 44 -
CHAPTER 7 MAINTENANCE _______________________________________________ - 46 -
7.1 OPERATION ENVIRONMENT REQUIREMENTS _________________________________________ - 46 -
7.2 ELECTRICAL AND FIXED CONNECTION INSPECTION _____________________________________ - 46 -
7.3 CLEARING AND CLEANING _____________________________________________________ - 46 -
APPENDIXES ___________________________________________________________ - 47 -

Overview
- 1 -
Chapter 1 Overview
1.1 Model definition
The model definition of PWS2-30K-NA energy storage inverter is shown in Fig. 1-1:
PWS2 - 30K - NA
North America version
Rated power:30kW
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 30kW 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 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.
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

Overview
- 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.
STOP！
The STOP icon indicates that when the inverter is running,
disconnection is not allowed. Disconnection operation can be
conducted after the inverter is shut down.
1.3 Safety instructions
PWS2-30K-NA energy storage inverter is designed and tested in strict accordance with
relevant international safety standard. 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

Overview
- 3 -
electrical and electronic equipment;
be familiar with relevant safety specification of electric system.
Professionals who meet the above conditions can:
(1) Install the inverter onto the wall;
(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.

Overview
- 4 -
CAUTION
All electrical installations should meet national/regional electrical
standards;
On-grid 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.
1.3.3 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 safety precautions 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.

Overview
- 5 -
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 the AC isolation switch between the power grid and the
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.

Overview
- 6 -
1.3.5 Others
WARNING
Safety signs, warning label and nameplate on the inverter:
Must be clearly visible;
Should not be removed or covered.
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. Any damage 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 housing
The label on housing contains important information for safe operation of the inverter. Don’t
tear or damage it.
The label on housing 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 only used for description and indication. For detailed information,
please refer to the product itself.

Introduction to energy storage system
- 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 PWS2-30K-NA is composed of
battery (pack), energy storage inverter, intelligent 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 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. PWS2-30K-NA energy
storage inverter pushes the data to EMS or other host systems in real time.
Energy Management
System
Intelligent Power
Distribution Unit Grid
Ethernet/RS-485
Energy Storage Inverter
Battery
Industrial Load
Battery Management
System
RS-485 RS-485
Fig.2-1 Structure of energy storage system

Introduction to energy storage system
- 8 -
2.1.2 Adaptive power grid type
PWS2-30K
L1
L2
L3
N
PE
Transformer
TN-S
PWS2-30K
L1
L2
L3 NPE
TN-C
PE PE
PWS2-30K
L1
L2
L3
N
PE
TN-C-S
PE
PWS2-30K
L1
L2
L3
N
TT
PE
PWS2-30K
L1
L2
L3
IT
PE
Transformer Transformer Transformer Transformer
Fig.2-2 Adaptive power grid type
CAUTION
VERY IMPORTANT INFORMATION
THERE IS NO ISOLATION TRANSFORMER IN THE ENERGY
STORAGE INVERTER OF THIS MODEL.
THE AC INPUT/OUTPUT OF ENERGY STORAGE INVERTER
CANNOT BE DIRECTLY CONNECTED WITH SINGLE PHASE LOAD.
IF SINGLE PHASE LOAD IS REQUIRED, IT SHOULD BE
CONNECTED THROUGH AN ISOLATION TRANSFORMER.
IF THE CAPACITY OF ENERGY STORAGE INVERTER DOES NOT
MEET THE DEMAND, PARALLEL CONNECTION OF MULTIPLE
DEVICES CAN BE CONDUCTED. THE STORAGE BATTERY WITH A
PROPER CAPACITY SHALL BE EQUIPPED FOR EACH INVERTER
IN DC SIDE. THE DEVICES CAN BE CONNECTED TO THE POWER
GRID IN PARALLEL IN AC SIDE.
THE DC SIDE OF TWO OR MORE ENERGY STORAGE INVERTERS
SHOULD NOT BE PARALLELED ON ONE SAME BATTERY
PACK/MODULE.
2.2 Overall dimension
Overall dimension of PWS2-30K-NA is shown in Fig.2-3.

Introduction to energy storage system
- 9 -
Fig.2-3 Overall dimension of PWS2-30K-NA (unit: mm)
2.3 Appearance
The appearance of PWS2-30K-NA is shown in Fig.2-4.
Fig.2-4 Appearance of front side of PWS2-30K-NA
SN
Name
Description
1
DC terminal
To connect power cables to the battery cabinet
2
Communication terminal
Including Ethernet, RS-485, R-EPO
3
AC terminal
AC wiring terminal for gird and AC load
8
7
6
5
4
1
2
3
8
7
6
5
4
1
2
3

Introduction to energy storage system
- 10 -
4
AC switch
Safety device to connect or disconnect the current in
AC side.
5
Bottom cover
Used to cover the connecting terminals of cables under
the case.
6
HMI
Human-machine interface which is used to set
parameters of energy storage inverter and read inverter
operation information.
7
Upper panel
Case cover
8
Air outlet
Ventilation duct exit for heat dissipation
Fig.2-5 Appearance of back side of PWS2-30K-NA
2.4 Technical parameters
Technical parameters of PWS2-30K-NA energy storage inverter:
Table 2-1 Table for technical parameters
Utility-interactive Mode
Battery charge/discharge voltage
150V~750V (350~750V Full Power)
Battery charge/discharge current
0~90A
AC voltage
480V (423V~528V)
AC current
0~36A
Nominal power
30kW
AC frequency
60Hz(59.5Hz~60.5Hz)
AC PF
Listed: 0.8~1 leading or lagging (Controllable)

Introduction to energy storage system
- 11 -
Actual capability: 0.1~1 leading or lagging (Controllable)
Stand-alone Mode
Battery discharge voltage
150V~750V (350~750V Full Power)
Battery discharge current
0~90A
AC output voltage
480V (±5% configurable)
AC output current
0~36A
Nominal AC output power
30kW (33kW max)
AC frequency
60Hz (±5Hz configurable)
AC output PF
Listed: 0.8~1 leading or lagging (Load-depend)
Actual capability: 0.1~1 leading or lagging (Load-depend)
Overload Capability
105%~115% 10min;
115%~125% 1min;
125%~150% 200ms
Physical
Cooling
Forced air cooling with replaceable fan module
Noise
<75dB
Enclosure
IP32/NEMA1
Max elevation
3000m/10000feet (> 2000m/6500feet derating)
Operating temp.
-20°C to 60°C (De-rating over 45°C）
Humidity
0~95% (No condensing)
Size (W*H*D)
470*660*176mm/
18.5*26*6.95 inches
Weight
43kg/95Lbs
Installation
Wall-mounted
Other
Peak efficiency
97.3%
CEC efficiency
96.5%
Protection
OTP, AC OVP/UVP, OFP/UFP, EPO, AC Phase Reverse,
Fan/Relay Failure, OLP, GFDI, Anti-islanding
Configurable protection limits
Upper/Lower AC Voltage/Frequency limit, Battery EOD
voltage.
AC connection
⚫3-Phase+N+PE
⚫240V Split-phase (modified firmware, extra transformer
required, derated to 20kW)
Isolation
Non-isolation
Certification
ETL listed conforming to UL1741
UL1741SA tested to comply:
⚫CPUC RULE 21,
⚫IEEE 1547
CEC listing pending (ETA May 2021)
Short Circuit Current
Peak short circuit current
62A@20ms

Introduction to energy storage system
- 12 -
Initial value of aperiodic current
62A@100ms
Initial symmetrical short circuit
current
54A@250ms
Decaying component of short circuit
current
54A@500ms
Time to trip
119ms
Communication
Ethernet port
x1 RJ45 slot, for EMS, via MODBUS TCP/IP
RS-485 port
x1 RJ45 slot, for EMS or BMS,
EMS via MODBUS RTU.
two kinds of BMS communication protocol supported
Remote emergency power off input
x1 RJ45 slot, adapts to NC switch input.
2.5 Technical specification
2.5.1 Principle description
There are three operation modes: on-grid discharging, charging and off-grid discharging.
When the battery voltage connected to PWS2-30K-NA is within the preset normal voltage
range, the inverter can operate under on-grid 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.
2.5.2 Function description
The functions of PWS2-30K-NA are as follows:
On-grid discharging: The inverter 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.
On-grid charging: The inverter is in rectification state and transmits 3-phase AC to charge
the battery (pack) by the set charging mode.
Off-grid discharging: The inverter 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.
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.

Introduction to energy storage system
- 13 -
Standard Ethernet interface is used to communicate with upper computer to realize
such functions as remote control and remote software upgrading.
Protections
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
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)
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 upper limit, the inverter
will automatically power off so as to protect the inverter.

Introduction to energy storage system
- 14 -
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 440V. The curvilinear relationship for grid voltage de-rating is as follows:
min
[ 480 ] ( 480 ) V V n grid
P P V V=
Working
Zone
n
P
min
V
max
V
440V
Fig.2-6 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:
Working
Zone
n
P
min
V
max
V
350V
Fig.2-7 Battery under-voltage de-rating
External command de-rating
The inverter can regulate the de-rating of output active and reactive power by LCD touch
screen or remote grid dispatching command. The operation state of the inverter will be
displayed on the LCD touch screen.

Equipment transport, storage and installation
- 15 -
Chapter 3 Equipment transport, storage and installation
3.1 Transport and storage
During transport and storage of inverter cabinet, pay attention to the packing label on
housing. 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.
4 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.

Equipment transport, storage and installation
- 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