V-TAC ESS Series User manual

INSTRUCTION MANUAL
ESS SERIES BATTERY PACK
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INTRODUCTION
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5
YEARS
WARRANTY
*

This document is mainly applicable to the following engineers
Technical Support Engineer
Installation Personnel
Maintenance Engineer
1 Foreword
This user manual mainly introduces the 48V 200Ah series product introduction,
application description, installation instructions, power-on instructions, maintenance
instructions and provides instructions for technical support engineers, maintenance
engineers and users.
Reader
Overview
Signs
The following signs may appear in this article, and their meanings are as follows.
Sign Meaning Description
Danger Indicates a hazard with a high level of risk that will cause
death or serious injury if not avoided.
Warning Indicates a hazard with a moderate risk that may cause
death or serious injury if not avoided.
Notice Indicates a hazard with a low level of risk that may cause
minor or moderate harm if not avoided.
Explanation
Supplementary explanation of key information in the
main text."Explanation" is not safety warning information,
and does not involve personal, equipment and
environmental damage information.
DANGER
WARNING
NOTE
ATTENTION

Before carrying out battery work, you must read carefully the safety precautions
and master the correct installation and connection methods of the battery.
Prohibit to turn it upside down, tilt, or collide.
Prohibit to short-circuit the positive and negative poles of the battery,
otherwise it will cause the battery to be damaged.
Prohibit to throw the battery pack into a fire source.
Prohibit to modify the battery, and it is strictly prohibited to immerse the
battery in water or other liquids.
DO NOT place installation tools on the battery during battery installation.
DO NOT disassemble, squeeze, bend, deform, puncture, or shred the
battery without the authorization of Vestwoods and authorized dealers.
DO NOT exceed the temperature range, otherwise it will affect the battery
performance and safety.
The battery circuit must be kept disconnecting status during installation
and maintenance operations.
Check the battery connection end bolts regularly to confirm that the bolts
are tight.
2 Safety
2.2 Abuse Operation
2.1 Safety Precautions
The battery pack needs to avoid abuse operations under the following (includ-
ing but not limited to) conditions:
Abuse Operation Protection Description
If the positive and negative poles are connected reversely,
the battery will be directly damaged.
External short circuit If the battery pack is short circuited externally, the battery
will be directly damaged.
Series connection application
The battery pack does not support the application of
battery packs in series. If the battery packs are forcedto be
connected in series, the batteries may be directly damaged,
and may even cause fire, explosion and other dangers.
Reverse connection of positive
and negative poles
1 Foreword.................................................................................................................................................
2 Safety........................................................................................................................................................
2.1 Safety Precautions......................................................................................................................
2.2 Abuse Operation.........................................................................................................................
3 Overview..................................................................................................................................................
3.1 Product Description...................................................................................................................
3.1.1 Features...............................................................................................................................
3.1.2 Basic Functions.................................................................................................................
3.2 Application Scenario.................................................................................................................
4 Application Description.....................................................................................................................
4.1 Parallel Connection Application............................................................................................
4.2 Low-temperature Application................................................................................................
4.3 Low battery-capacity Storage (SOC≤5%)...........................................................................
4.4 Application of Nearing the Ocean.........................................................................................
5 Product Introduction..........................................................................................................................
5.1 Panel Introduction......................................................................................................................
5.1.1 Panel Function...................................................................................................................
5.1.2 Indicator Description......................................................................................................
5.1.3 DIP Address........................................................................................................................
5.1.4 Communication Port Definition..................................................................................
5.1.5 Dry Contact Alarm Definition.......................................................................................
6 Installation..............................................................................................................................................
6.1 Tools Preparation........................................................................................................................
6.2 Unpacking and Inspection.......................................................................................................
6.3 Preparing for Installation.........................................................................................................
6.4 Installation....................................................................................................................................
6.5 Cable Connection.......................................................................................................................
7 Power On.................................................................................................................................................
7.1 Power-on Operation...................................................................................................................
7.1.1 Pre-check Preparing Power-on Operation...............................................................
7.1.2 Power on..............................................................................................................................
7.1.3 UIWare Configuration.....................................................................................................
7.1.4 Check by UI software.......................................................................................................
7.2 Power System Parameter Setting...........................................................................................
8 Shipment & Maintenance & Storage...........................................................................................
8.1 Shipment.......................................................................................................................................
8.2 Maintenance................................................................................................................................
8.2.1 Battery Maintenance Considerations.......................................................................
8.2.2 Routine Maintenance.....................................................................................................
8.3 Battery Storage...........................................................................................................................
9 Trouble Shooting.................................................................................................................................
10 Warranty...............................................................................................................................................
11 Abbreviations.....................................................................................................................................

3 Overview
The 48V 200Ah series products use lithium iron phosphate (LFP) as the positive
electrode material. It can be widely used in telecom scenario and energy storage
systems such as off-grid, grid-connected, and home use.
The battery pack is composed of 15 cells/16 cells of LFP batteries in series
connection, with low self-discharge, high energy density, and no memory effect. This
type of battery also has excellent performance in high rate, long cycle life, wide
temperature range, and high safety.
3.1.1 Features
3.1 Product Description
• High energy density
Higher volume ratio energy and weight ratio energy.
• Maintenance-free
The battery pack is maintenance-free in the process of using, which can save
customers' battery operation, maintenance testing costs and reduce the frequency of
on-site replacement.
• Long cycle life
The battery pack life is 3 times long than the ordinary lead-acid batteries.
• Excellent temperature characteristics
When charging, the battery working temperature can reach 0℃～＋60℃(recom-
mended using temperature: +15～＋35℃). When discharging, the battery working
temperature can reach -20℃～＋60℃(recommended using temperature: +15～
＋35℃).
3.1.2 Basic Functions
• Monitor
The battery system uses a high-performance BMS, it has protection functions
such as current, voltage.
• Alarm
Support abnormal alarms such as overvoltage, under-voltage, overcurrent, short
circuit, high and low temperature, battery failure, hardware failure, etc.
• Communication
Provide dual RS485 interfaces, upload alarming and status data through the
RS485/CAN communication protocol.

• Parallel connection application
Support multiple battery packs in parallel, RS485/CAN communication supports
up to 6 groups without control unit（or max supports 15 groups with control unit）.
• Balance function
Support the cells balance function.
• Extended function
Extended SNMP V2, SNMP V3, LCD, anti-theft, etc.
Figure 3-1 Normal Working Operation Diagram of The Battery pack
3 Overview
3.2 Application Scenario
The battery pack is used to provide backup power to the power system, and can
be used for telecom, household energy storage, solar energy storage and other
application scenarios.
The normal working operation diagram of the battery pack can be as shown in
the figure below.

4 Application Description
The battery packs support parallel connection, and synchronously increases the
backup time or backup power.
Multiple battery packs of parallel connection need to use RS485/CAN to
communicate, pay attention to the DIP switch settings. Turn off the batteries before
connecting them in parallel.
4.2 Low-temperature Application
4.1 Parallel Connection Application
• Low-temperature Charging
The battery pack does not support direct charging of the battery below 0°C.
When the minimum temperature of the battery is below 0°C, the BMS will cut-off the
charging circuit and cannot be charged.
• Low-temperature Discharging
The battery pack does not support discharge below -20°C. When the minimum
temperature of battery is below -20°C, the BMS will cut-off the discharge circuit and
cannot discharge.
4.3 Low battery-capacity Storage (SOC≤5%)
After the battery pack is power off, there will be BMS static power consumption
and self-discharge loss. In actual scenarios, it is necessary to avoid low-battery-pow-
er state（SOC≤5%）storage. If it is unavoidable, the longest storage period is 30

The atmospheric corrosion environment is defined and classified according to
the natural environment state, and the A/B environment is defined as follows:
A: environment refers to the ocean or the land near the pollution source, or
the environment with simple shelter (such as awning). "Near the ocean" refers to the
area 0.5～3.7km away from the ocean; "Near the pollution source" refers to the area
within the following radius: 3.7km from the saltwater lake, 3km from heavy pollution
sources such as smelters, coal mines, and thermal power plants, chemical industry,
rubber, electroplating, etc. 2km from medium pollution sources such as chemical
industry, rubber and electroplating, etc. And 1km from light pollution sources such as
food, leather and heating boilers, etc.
B: environment. Refers to the environment on land or outside with simple
shelter (such as awning) within 500m from the coast, or the environment on the sea.
days@25°C, 15 days@45°C. The battery needs to be recharged in time after storage,
otherwise the battery may be damaged due to over-discharge, and the entire battery
pack needs to be replaced.
The following conditions may cause the battery pack to be stored in a
discharged state:
After the utility power failure, the line/fault cannot be eliminated in time, and
the power supply cannot be restored for a long time.
After the installation and commissioning work is completed, the utility power
is turned off directly, but the battery pack is not powered off, which will cause the
battery to enter the low power consumption mode.
Other reasons cause the battery pack to fail to enter low power consumption
normally.
4 Application Description
4.4 Application of Nearing the Ocean
The battery pack can be used under other environmental conditions and cannot
be used alone under A/B environment. If it is to be used in the A/B environment, it
needs to be equipped with a high-protection air-conditioning cabinet, which is
recommended to be IP55 or higher.
NOTE

5 Product Introduction
5.1 Panel Introduction
5.1.1 Panel Function
Figure 5-1 Front Panel
Table 5-1 Operation Panel Interface Definition
The interface definition as below table：
No. Name Description Remark
1&12
2
SOC State of charge
Details shows in table 5-2
3 ALM Alarm light
Address range 0~15
4
RJ-11
RJ-11 interface for firmware
Used for debugging
5
RJ-45/CAN
2*RJ
- 45 interface for RS485/
CAN communication
Details shows in table 5-7
6
RESET
Reset switch
8&9
Dry Contact NC. / NO. dry contact Dry contact definition shows
in table 5-8
10
Switch
Power switch
11
Battery Output
Power terminal
13 GND Module ground connection
-
-
Details shows in table 5-4
RUN Run status of battery Details shows in table 5-3
Dip switchADD
update
7
-
-

5 Product Introduction
5.1.2 Indicator Description
Table 5-3 RUN Indicator Definition
Table 5-2 SOC Indicator Definition
There are 6 Indicators on the operation panel, divided into three categories: 4
green SOC Indicators, 1 red alarm Indicator and 1 green run indicator.
The power indicator is used to identify the current capacity status of the battery.
The number of flashing indicators corresponds to different remaining capacity. The
specific meaning is shown in the following table.
Flash Mode ON OFF Module Status
Flash 1 0.25 s 3.75 s
Flash 2 0.5 s 0.5 s Charge
Flash 3 0.25 s 0.25 s
Status LED
SOC indicator
Keep On Discharge
Keep Off
Idle
Stant up failed
Sleep/Fault
-
-
L4 L3 L2 L1
Flash 2
OFF
OFF OFF OFF
OFF
OFF
OFF
ON
ON
ON ON
ON ON
SOC
0~10%
10~25%
25~50%
50~75%
75~100% ON ON ON ON
OFF
OFF

Table 5-5 Battery Status and Indicator Operation Mode
5 Product Introduction
The corresponding relationship between battery operation status and indicator
operation status is shown in the following table.
Battery
status
Normal/
Abnormal RUN
ALM
SOC Indicators
Description
- -
-
Green Red Green Green Green Green -
Power off/
Sleep OFF OFF OFF OFF OFF OFF -
Standby Normal Flash 1 OFF According to SOC Flash mode
shown in Table 2
Charge Normal Flash 2
ON
OFF
OFF
According to SOC
According to SOC
-
Error Abnormal OFF ON OFF -
-
Discharge Normal
Abnormal According to the
state of charge
and discharge
According to SOC Recoverable
Flash 2
Alarm
Table 5-4 Alarm Indicator Definition
Indication Status ON OFF Module Status
Flash 2 0.5 s 0.5 s
Keep On
Fault（Charge/Discharge MOS、NTC、
BQ940、ADC Fault、Battery lock）
Keep Off
Alarm
（Cell Over-voltage、Cell Under-voltage）
Standby/Sleep
-
-

Table 5-6 Correspondence between BMS and DIP Switch
5.1.3 DIP Address
To communicate with the battery, you need to assign an address to the battery
BMS through the DIP switch.
5 Product Introduction
The relationship between DIP address and BMS address as below：
DIP 1 DIP 2 DIP 3 DIP 4 BMS Address
OFF OFF OFF OFF 0
ON OFF OFF OFF 1
OFF ON OFF OFF 2
ON ON OFF OFF 3
OFF OFF ON OFF 4
ON OFF ON OFF 5
OFF ON ON OFF 6
ON ON ON OFF 7
OFF OFF OFF ON 8
ON OFF OFF ON 9
OFF ON OFF ON 10
ON 11
ON ON 12
OFF ON ON 13
OFF ON ON ON 14
ON ON ON ON 15
ON ON OFF
OFF OFF
ON
BMS Address

Table 5-7 RJ 45 Definition
Table 5-8 Dry Contact Alarm Definition
5 Product Introduction
RJ 45 definition as below：
5.1.4 Communication Port Definition
The module uses the default NC. dry contact to provide alarm signals. The
alarm definition of the dry contact is defined as follows.
5.1.5 Dry Contact Alarm Definition
RJ 45/CAN Photo Pin Description
4RS485_A
5CAN_L
6CAN_H
7 RS485_B
8GND
1/2/3 NC
Dry Contact No. Alarm Definition
Dry Contact 1
Dry Contact 2
Battery lock；
940 module fault；
NTC disconnection;
Single cell voltage is lower than 1V;
Charging and discharging MOS fault；
Voltage gap between cells is more than 800mV.
12345678
SOC≤20%
When batteries are used in parallel, the DIP address of the master pack is set to 1
by default. Therefore, DIP address ‘1 ’cannot be used for battery communication.
NOTE
Figure 6-5 Connect Ground Cable

Table 6-1 Installation
6.1 Tools Preparation
6 Installation
Use insulated tools to avoid electric shock. If you use tools without insulation
protection, you need to wrap the exposed metal parts with insulation tape for
insulation treatment.
The following table describes the tools and meters that may be used before
installation.
Manual forklift Electric forklift Electric screw driver Adjustable wrench
Phillips screwdriver Slotted screwdriver Torque wrench Claw Hammer
Socket wrench Multimeter Protective gloves Helmet
Insulated shoes Anti-static gloves Goggles Insulating tape
ATTENTION

Study this manual carefully before any installation of the batteries.
The batteries must only be installed and operated by trained personnel.
Check the quantity of battery and accessories with delivery list.
Check the appearance whether there is damaged or leakage, if any damage is
detected, please do not proceed to the next installation.
6 Installation
6.2 Unpacking and Inspection
Make sure to disconnect and isolate the battery from any electrical source,
and then turn on the MCB (switch). Verify that the red ALM LED does not stay on for
more than 30 seconds.
Turn off the switch and continue with the installation.
6.3 Preparing for Installation
Figure 6-1 Make Sure the Battery is in Off Status
1 Make sure the battery is in off status. As shown in Figure 6-1.
6.4 Installation

6 Installation
Figure 6-2 Fix the Battery on the Cabinet or Rack
Figure 6-3 Right Way to Place Battery
2 Put the battery into cabinet or rack. As shown in Figure 6-2.

Figure 6-5 Connect Ground Cable
5 Product Introduction
The 48V 200Ah series batteries can applied to install in 19-inch rack / existing
cabinets.
The 48V 200Ah series batteries preferred to be installed in flat position as Fig
6-3 shown.
The battery must be fixed tightly with 4pcs M6*25 crown screws.
The grounding screw is M5*12.
In case of several battery parallel connection, it is advisable to leave a space of
at least 10mm between them.
NOTE
Figure 6-4 Connect Ground Cable
Pay attention to the polarity of the battery pack.
Connect the negative power cables of all battery packs first, and then connect the positive
power cables of the battery packs.
1 Connect Ground Cable
Take out the ground wires and connect one end to the ground point of the
battery pack and other end to the ground point of the cabinet.
6.5 Cable Connection

6 Installation
Figure 6-5 Connect the Battery Pack Power Cable
2 Connect Power cable
Use the negative power cable to connect the negative bus bar with the battery
negative (‘-’) terminal, and use the positive power cable to connect the positive
bus bar with the battery positive (‘+’) terminal.
A. Use the communication cable to connect the battery packs in series through
the RS485 communication port, and connect the battery packs at the end to the user's
RS485 communication port through the RS485 communication port.
B. Assign addresses to battery packs. Assign addresses to battery packs by dialing
the dialing keys of the dialing switch. Please refer to 5.2.3 about the correspondence
between DIP switch and battery pack address.
3 Connect Communication Cable
Figure 6-6 Connect RS485 Communication Cable

Wear safety protection equipment to prevent electric shock from causing
electric shock injuries.
Use insulated tools to avoid electric shock.
Communication cables and power cables must be laid separately.
Before connecting cables, make sure that the bus-bars at the user end are in
disconnected state.
Pay attention to the polarity of the battery pack.
ATTENTION
6 Installation
Figure 6-7 Connect the 120Ω Resistor
To ensure stable CAN communication with the inverter when batteries are used in
parallel, please take out a 120Ω resistor from the ‘Battery Kit’ and insert it into
the RJ45 port of the battery that communicates farthest with the inverter.
4 120Ω Resistor Connection

After completing the installation of the battery, users need to perform a pre-power
check to ensure that the device installation and cable connection are correct.
Check whether the cables are connected correctly, and the connectors are fastened.
Check whether the battery pack’s power cable terminal is snapped into place and
covered with an insulating cover.
Check whether the long cables are bundled.
Check whether the communication cable and the power cable are separated.
Check whether the cabinet，battery pack are grounded.
7.1 Power-on Operation
7.1.1 Pre-check Preparing Power-on Operation
7 Power On
Figure 7-1 Check the Battery Voltage

7 Power On
1 Power on the charger/inverter at the user terminal.
2 Set the battery MCB/Switch to ON (if available).
3 Observe Run/Alarm indicator and judge the battery operating status. If the
RUN indicator of the battery is on and the ALARM indicator is off, indicating that the
battery is working normally.
4 Please configure the actual number of batteries in parallel connection through
the UIWare. As follows.
7.1.2 Power On
This section is for professionals only and requires specific tools and software.
Currently only open to growcol accredited engineers.
NOTE