WELSON ES2000 User manual

[phone] I [e-mail] I www.welsonpower.com
Home Energy Storage System
ES2000/ES5000/ES2000PLUS Operation Manual
ES5000(51.2V100Ah)/3U
ES2000(51.2V48Ah)/3U
ES2000PLUS(48.0V120Ah)/2U

[phone] I [e-mail] I www.welsonpower.com
This manual is intended for the WELSON ES2000/ES5000/ES2000PLUS Energy Storage battery, but the
hybrid inverter and any other equipment is not included.Please read this manual before install the smart
battery module and follow the instruction carefully during the installation process. If there is any not
understand point, Please donot install before confirm with us.
1 Safety Introduction
1.1 Important Safety Instructions
1.2 Warnings in this Document
1.3 Battery handing guide
1.4 Response to emergency situations
1.5 Installers
1.6 Scrap battery
1.7 Contact information
2 Product GeneralIntroduction
2.1 Technical data
2.2 Exploded views of battery
2.3 Indicator and ports
2.4 Communication interface plat
2.5 How it works
2.6 Feature
3 Guidance for disconnection of batteries during shipment
4 Installation Prerequisites
4.1 Installation location
4.2 Installation process
4.3 Installation materials
4.4 Tools
4.5 Safety instruments
4.6 Network cable
4.7 Storage
5 Battery Installation
5.1 Checks before installation
5.2 Installation the battery
5.2.1 Modules connection
5.2.2 Address select of Master and Slave battery(ies) connection
6 Configuration
6.1 Settings for CAN /485 bus pins
7 Commissioning
7.1 Commissioning battery
7.2 Shutting down battery

[phone] I [e-mail] I www.welsonpower.com
1 Safety Introduction
1.1 Important Safety Instructions
This manual contains important instructions for ES2000/ES5000/ES2000PLUS Home Energy
Storage System and this manual must be followed when installing and using this product.The
product is designed and tested in accordance with international safety requirements IEC 60364,
but as with all electrical and electronic equipment, certain precautions must be observed when
installing and/or operating the product. To reduce the risk of personal injury and ensure the safe
installation and operation of the product, you must carefully read and follow all instructions,
cautions and warnings in this manual.
1.2 Warnings in this Document
A warning describes a hazard to equipment or personnel. It calls attention to a procedure or
practice, which, if not correctly performed or adhered to, could result in damage to or destruction of
part or all of the WELSON equipment and/or other equipment connected to the WELSON
equipment or personal injury.
Symbol Description
Caution, risk of electric shock
Heavy enough may cause severe injure
Keep the battery away from open flame or ignition sources
Keep the battery away from children
Do not dispose of the product with household waste
Recycling
Read this manual before installation and operation
For safety reasons, installers are responsible for familiarizing themselves with the contents of this
manual and all warnings before performing installation.

[phone] I [e-mail] I www.welsonpower.com
1.3 Battery handing guide
Use the battery pack only as directed.
If the battery defective, appears cracked, broken or otherwise damaged, or fails to operate,
contract the WELSON hot line immediately.
Do not attempt to open, disassemble, repair, tamper with, or modify the battery. The battery
pack is not user serviceable.
To protect the battery and its components from damage when transporting, handle with care.
Do not subject it to any strong force.
Do not insert foreign objects into any part of the battery pack.
Do not use cleaning solvents to clean the battery.
The battery shall not be connected directly to SELV circuit.
1.4 Response to emergency situations
The WELSON ES2000/ES5000/ES2000PLUS Smart battery module is designed with multiple
safety strategies to prevent hazards resulting from failures. However, WELSON cannot guarantee
their absolute Safety for uncertain situations.
1.4.1 Leaking batteries
If the battery pack leaks electrolyte, avoid contact with the leaking liquid or gas.
Electrolyte is corrosive and contact may cause skin irritation and chemical burns. If one is
exposed to the leaked substance, do these actions:
1.4.2 Inhalation:
Evacuate the contaminated area, and seek medical attention immediately.
1.4.3 Eyes contact:
Rinse eyes with flowing water for 15 minutes, and seek medical attention Immediately.
1.4.4 Skin contact:
Wash the affected area thoroughly with soap and water, and seek medical attention
immediately.
1.4.5 Ingestion:
Induce vomiting as soon as possible, and seek medical attention immediately.
1.4.6 Fire:
In case of a fire, make sure that an ABC or carbon dioxide extinguisher is nearby
and does not use water to extinguish the fire
WARNING
The battery pack may catch fire when heated above 130°C. If a fire breaks out where the
battery is installed, do these actions:
1. Extinguish the fire before the battery catches fire.
2. If the battery has caught fire, do not try to extinguish the fire. Evacuate people
immediately
3. If the battery catches fire, it will produce poisonous gases. Do not approach.
1.4.7 Wet battery
If the battery is wet or submerged in water, do not try to access it. Contact WELSON hot
line or your distributor for technical assistance.

[phone] I [e-mail] I www.welsonpower.com
1.4.8 Damaged battery
If the battery damaged, please contract WELSON hot line or your distributor for help as
soon as possible, because damaged battery is dangerous and must be handled with
extreme caution. Damaged battery is not suit for use and may pose a danger to people or
property. If the battery seems to be damaged, return it to WELSON or your distributor.
CAUTION
Damaged battery might export electrolyte or flammable gas, so contact WELSON
for advice and information immediately,we will deal with it within 48h.
1.5 Installers
WELSON Energy Storage battery is suggested installing by skilled worker or electrician. A skilled
worker is defined as a people who had been trained and qualified electrician or had all of the
following skills and experience:
Knowledge of the functional principles and operation of on-grid Energy Storage systems.
Knowledge of the dangers and risks associated with installing and using electrical devices
and acceptable mitigation methods.
Knowledge of the installation of electrical devices
Knowledge of and adherence to this manual and all safety precautions and best practice
1.6 Scrap battery
For scrap battery(-ies), please treat with local laws or regulations to recycle or scrap.
1.7 Contact information
Use the contacts below for technical assistance. This phone numbers is available only during
business hours on weekdays.
Phone number 86-13771427320
Address
： B2-7,No.82 Dicui Road,BinhuDistrict,Wuxi,Jiangsu,China
E-mail [e-mail]

[phone] I [e-mail] I www.welsonpower.com
2 Product GeneralIntroduction
2.1 Electrical Prefermance
Items ES2000 ES2000PLUS ES5000
Nominal Voltage 51.2Vd.c 51.2Vd.c 51.2Vd.c
Nominal Current 30.0A 30.0A 60.0A
Nominal Capacity 48.0Ah@25℃50.0Ah@25℃100.0Ah@25℃
Useable Capacity 43.0Ah@25℃45.0Ah@26℃90.0Ah@26℃
Total Energy 2.40KWh 2.56KWh 5.10KWh
Useable Energy* 2.20KWh 2.30KWh 4.60KWh
Nominal Charge/Discharge Power 1.50kW 1.75kW 3.0kWh
Dimension(L*W*H) 500*442*133 mm(3U) 442*500*89mm(2U) 550*442*133 mm(3U)
Weight 27.5Kg 26.0Kg 48.0Kg
Peak Power(Only discharge) 3.5kW for 3 seconds 5.0kW for 3 seconds
Peak Current(Only Discharging) 70A for 3 seconds 100A for 3 seconds
Constant Current(Only discharge) 40.0A 80.0A
Voltage Range 48~56Vd.c
Max. Charge Voltage 57.6V
Max. Recommended DOD (Off-grid) 90%
Efficiency >97%
Operating Condition Indoor
Operating Temperature@Charge 0℃to +45℃
Operating Temperature@Discharge -10℃to +55℃
Operating Humidity < 60% (No Condensed Water)
Pollution Degree 3
Over Voltage Category II
Cooling Type Natural cooling
Case Material Metal
Color Black or Grey
Installation Wall Mounting/Ground Installation/Cabinet
IP rating IP 20
Max. Number of Parallel or Series 8
Warranty 10 years
Life Span >15 years
Cycles >6000@90%DOD
Communication CAN/RS485
Protection Mode Dual hardware protection
Battery Protection Over-current/Over-voltage/Short circuit/Under-voltage/Over-temperature
Safety Certification of Cells CE+CB
Safety Certification of Module TUV(IEC 62619, IEC 62040-1,CE)
Hazardous Material Classification 9
Transportation UN 38.3
Testing conditions based on temperature 25℃at the beginning of life.
*Total Energy/Usable Energy measured under specific conditions from WELSON 0.2C CC-CV

[phone] I [e-mail] I www.welsonpower.com
2.2 Exploded views of battery

[phone] I [e-mail] I www.welsonpower.com
2.3 Indicator and ports(Take ES2000 as an example, ES5000 and ES2000PLUS are similar.)
2.3.1 Indicator
There are two LED indicators on the front of the battery to show its operating status.
WIFI Module SW1 SW2 SW3 Reset Run Fault Handle
Panel Button Earth SW4 SW5 Inverter M/S BAT+ BAT-
Table 2-1 Designations on the battery
Item Designation Definition
1 Running Battery normally working without fault
2 Fault Battery is in a warning state
2.4 Communication interface plat
SW1 DIP switch select for CAN or RS485
SW2 Resistance for communication and DIP switch for parallel or Series connection
SW3 Switch for battery’s Address select
SW4 & SW5 Communication interface for battery or master battery with Inverter
Reset Reset the WIFI or GPPS/GPS module configure

[phone] I [e-mail] I www.welsonpower.com
2.5 How it works
Work modes:Self-use(with PV Power)
Priority:load>battery>grid
This mode applies the area that has low feed-in tariff
and high energy price.
The power generated from PV will be used to supply the
the local loads firstly, then to charge the battery. The
redundant power will export to the public grid.
Work modes:Self-use(without PV Power)
When no PV supplied, battery will discharge for local
loads firstly, and grid will supply power when the battery
capacity is not enough.
Work modes: Force time use
Priority:battery>load>grid(when charging)
Priority:load>battery>grid(when discharging)
This mode applies the area that has electricity price
between peak and valley. User can use off peak
electricity to charge the battery.
The charging and discharging time can be set flexibly,
and it also allows to choose whether charge from the
grid or not.
Work modes: Feed in Priority
Priority:load>grid>battery
This mode applies the area that has high feed-in tariff
and export control.
The PV generated power will be used to supply the local
loads firstly, then export to the public grid. The
redundant power will charge the battery.

[phone] I [e-mail] I www.welsonpower.com
Work modes: Back up mode
Priority:battery>load>grid
This mode applies the area that has frequent power
outages. And this mode ensures the battery will has
enough energy to supply when the grid is off.
In this mode battery will be charging forcibly in the
setting time and will never be discharged when the grid
is on, and it also allows to choose whether charge from
the grid or not.
Work modes: EPS Status
When the grid is off, system will supply emergency
power from PV or battery to supply the home loads.
(Battery is necessary in EPS mode.)
2.6 Feature
The WELSON Home Energy Storage battery has following features:
Energy storage unit: This battery is suit for photovoltaic system compatibility.
Battery management system (BMS): The battery built-in BMS monitors its operation and
prevents the battery from operating outside design limitations.
Monitor: The battery BMS built-in with WIFI module, the battery running information could be
seeing in mobile phone and computer.
Easy firmware update: The BMS firmware can be updated to the latest version.
Expandability: The battery capacity can be increased by adding another battery.See part
5.2 Installation the battery.
3 Guidance for disconnection of batteries during shipment
3.1 Cartons that have been crushed, punctured, or torn in such a way that contents are revealed shall
be set aside in an isolated area and inspected by a skilled person. If the package is deemed to be
not shippable, the contents shall be promptly collected, segregated, and eitherthe consignor or
consignee contacted.
3.2 The DC circuit of WELSON ES2000/ES5000/ES2000PLUS battery has been disconnected before
outgoing.
3.3 A precautionary label had been affixed to the shipping carton to alert individuals as to the battery
within the package have been disconnected; otherwise, the battery should not be transported.
3.4 We have conducted comprehensive tests to ensure the equipment they distribute around the world
is safe for shipping transport. These products shall be handled with care and immediately
inspected if visibly damaged.If the carton visibly damaged, please contract with WELSON hot line
to confirm whether the battery could be used safely or not.

[phone] I [e-mail] I www.welsonpower.com
CAUTION IF DAMAGED
Battery is NOT connected
BATTERIES,NON-SPILLABLE
Packages,crushed,punctured.or torn such that contents
are revealed,should be set aside in an isolated area and
be inspected by a qualified person.If the package is
deemed to be not shippable,contents shall be promptly
collected, segregated,and either the consignor or
consignee contacted.
4 Installation Prerequisites
4.1 Installation location
Make sure that the installation location meets the following conditions:
The building is designed to withstand earthquakes.
Far away from the sea to avoid salt water and humidity.
The floor is flat and level.
No flammable or explosive materials nearby
Optimal ambient temperature is between 15℃and 30°C.
Temperature and humidity stays at a constant level.
Minimal dust and dirt in the area.
No corrosive gases present, including ammonia and acid vapor.
The WELSON Smart battery module is rated at IP20, so the battery could be installed indoor. If the
ambient temperature is outside the operating range, battery will protect itself by shutting down.
The battery optimal operate temperature is 15°C to 30°C. Frequent exposure to severe operating
condition would exacerbate the performance and life time of the battery.
.4.2 Installation process
The battery should be installed according to the following flow chart.

[phone] I [e-mail] I www.welsonpower.com
Start
Yes
Check transport damage? Contact your distributor
No
Read this manual
No
Check package item
Ok?
Yes
Select the installation location
Installing battery
Commissioning
No
Normally running? Troubleshooting
Yes
Finish
4.3 Installation materials
Following installation materials should be prepared by installers.
Power cable
Data cable
Ground wire
Bipolar external isolator, when two or more battery systems in parallel, each of them shall
have a bipolar isolator.
NOTICE
1. Make sure that the cross-sectional area of charging cables is 25 to 35 mm2
2. A breaker between WELSON battery and inverter was recommended to install,
and the breaker’s min. current should be over 150A or following

[phone] I [e-mail] I www.welsonpower.com
4.4 Tools
To install the battery pack, those following tools are probably required
Phillipsscrewdriver
Torque wrench
Cable crimper
Wire clamp
Voltmeter Tape measure Drill Flat-head screwdriver
4.5 Safety instruments
When dealing with the battery, following safety gears should be equipped. Installers must meet the
relevant requirements of IEC 60364 or the domestic legislation and other relevant international
standards.
Insulated glove
Safety goggles
Safety shoe
4.6 Network cable
If needed, the network cable should be made like that diagram. But the network cable between
battery and Inverter should be made following the definition of Inverter. If available, use a LAN
cable tester to check whether the cable is faulty

[phone] I [e-mail] I www.welsonpower.com
4.7 Storage(Take ES2000 as an example, ES5000 and ES2000PLUS are similar.)
If the battery is not to be installed immediately, or removed from operation and needs to be stored
for a long period, please choose an appropriate location to store it. Instructions for storage are:
Do not stack more than 8 battery boxes.
The temperature of battery stored recommended in the range of -20°C to 25°C.
Do not expose to water
The battery box should be upright as shown in the following figure and not stacked upside down
when storing the battery box.
If the battery needs to be stored over 3 months, the DC circuit of battery suggests to be
disconnecting. Otherwise, the battery would discharge at a minimum rate and capacity degrades
depended on storage time, the battery self-consumption less than 5w.And, if the battery stored
over 6 months, it is suggested to connect the battery with inverter and commission the system.

[phone] I [e-mail] I www.welsonpower.com
5 Battery Installation(Take ES2000 as an example, ES5000 and ES2000PLUS are similar.)
5.1 Checks before installation
There are a few things to check before installing the battery to ensure that it has no defects.Check
item 1: Check the battery voltage.
5.2 Installation the battery
NOTICE
The symbol located on the front of battery, and the earth wire between
battery and inverter is compulsive for Series Connection. For Parallel
connection, the earth wire was recommended to be installed.
5.2.1 Modules connection
To prevent the battery from moving,make sure the battery fixed to a wall or ground
NOTICE
If the battery is installed above the floor or on a platform, make sure that the wall or
platform is capable of supporting the battery’s weight.
5.2.1.1 Wall mounting
1. Determine bracket mounting place
to be fixed using this Positioning
cardboard.
2. Drill holes in the wall for the M8
expansion screw anchors, which
depth should beat least 50 mm.
Tighten the screws to a torque
around 2.5 N∙m.
WARNING
If this checking process is executed for any reason after the battery is fully installed,make sure
that the inverter is turned off or break the connection between battery and inverter while
checking the battery
Press and hold the panel button for about
4s and then release it after the two LED
lights on, measure the voltage at the
terminal interface with a voltmeter. If the
voltage is lower than 48V, do not use the
battery and contact WELSON hot line or
your distributor

[phone] I [e-mail] I www.welsonpower.com
3. Fasten the battery to bracket
fasten hole with M6 screws with
2.0N∙m roughly.
4. Meanwhile, two batteries could be
installed by theses brackets.
Note: if more than 4 batteries installed, a cabinet recommended to be selected for the
battery’s stable.

[phone] I [e-mail] I www.welsonpower.com
5.2.1.2 Ground installation
Meanwhile, WELSON ES2000/ES5000/ES2000PLUS battery also could be
installed on floor, the installation step as following:
Parallel connection
1. Fix the braced feet to battery’s
mounting holes one by one.
2. If more power and energy needed,
two or more (no more than 5)
batteries could be installed in one
stack.
3. But if the number of batteries at
the range of 6~8, a cabinet
recommended to be selected.

[phone] I [e-mail] I www.welsonpower.com
Series connection
1. Fix the braced feet to battery’s
mounting holes one by one.
2. If more power and energy needed,
two or more (no more than 5)
batteries could be installed in one
stack.
3. But if the number of batteries at
the range of 6~8, a cabinet
recommended to be selected.

[phone] I [e-mail] I www.welsonpower.com
5.2.2 Address select of Master and Slave battery(ies) connection
For parallel connection, please make sure the SW2 DIP switch of selected as this type.
WARNING
Please make sure the SW2 DIP switch selected correctly, if the battery connected in
Parallel mode, but select SW2 DIP8 at ON position, probably lead serious fault even
dangerous. Meanwhile, if battery connected in Series mode select SW2 DIP8 at OFF
status, serious fault and dangerous probably occurred.
Connected
battery Number Group Set of SW2 Address Set (SW3)
SeriesConnect Parallel Connect
1 —
2 Master
Slave
3
Master
Slave 1
Slave 2
4
Master
Slave 1
Slave 2
Slave 3
5 Master
Slave 1

[phone] I [e-mail] I www.welsonpower.com
Slave 2
Slave 3
Slave 4
6
Master
Slave 1
Slave 2
Slave 3
Slave 4
Slave 5
7
Master
Slave 1
Slave 2
Slave 3
Slave 4
Slave 5
Slave 6
8
Master
Slave 1
Slave 2
Slave 3
Slave 4
Slave 5