V-TAC VT-48100E LFP Lithium Rack Solar System Storage Instruction Manual

V-TAC VT-48100E LFP Lithium Rack Solar System Storage

INTRODUCTION

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Overview

Overview
This operation manual mainly introduces the VT48100E ESS series product introduction, application description, installation instructions, power-on instructions, maintenance instructions and provides instructions for technical support engineers, maintenance engineers and users.

Reader
This document is mainly applicable to the following engineers.

• Technical Support Engineer
• Installation Personnel
• Maintenance Engineer

Signs
The following signs may appear in this article, and their meanings are as follows.

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.

  NOTE|

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.

Safety

Safety Precautions

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 supplier 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.

Abuse Operation

The battery pack needs to avoid abuse operations under the following (includ- ing but not limited to) conditions:

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 forced to be connected in series, the batteries may be directly damaged,

and may even cause fire, explosion and other dangers.

Overview

Product Description

The VT48100E ESS series products use lithium iron phosphate (LFP) as the positive electrode material. It can be widely used in energy storage systems such as residential energy storage, back-up power, and PV self-consumption optimization.
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.

Features

• 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℃
  (recommended using temperature: +15～＋35℃). When discharging, the battery working temperature can reach -20℃～＋60℃ (recommended using temperature: +15～＋35℃).

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 RJ45 interfaces, upload alarming and status data through the RS485/ CAN communication protocol.

Overview

• 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, LCD, anti-theft.

Application Scenario

The battery pack is used to provide backup power, load shifting, peaking shaving and can be used for residential 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.

Application Description

Parallel Connection Application

The battery packs support parallel connection, and synchronously increases the backup time or backup power.
Confirm the consistency between the battery packs, check the SOC and voltage and turn off the batteries before connecting them in parallel.
Multiple battery packs of parallel connection need to use RS485/CAN to communicate, pay attention to the DIP switch settings.

Low-temperature 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.

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-power state （ SOC≤5% ） storage. If it is unavoidable, the longest storage period is 30 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.

Application Description

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.

Application of Nearing the Ocean

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.

NOTE

• 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.

Product Introduction

Product Appearance

NOTE

• The battery packs show as above is standard product. At the same time, supplier can also provide customized products according to customer’s requirements.
• With process improvements and product upgrades, the product characteristics described are subject to change without notice.
• For the parameters of specific products, please refer to the corresponding product datasheet.

Product Introduction

Panel Introduction

Panel Function

NOTE

• VT48100E ESS series panel functions take VT48100E as an example.

The interface definition as below table：

Table 5-1 Operation Panel Interface Definition

4

|

RESET

|

Reset switch

| Restart battery and recover some certain alarms status
5| ADD| Dip switch| Address range 0~15
6| RJ-11| RJ-11 interface for firmware update| Used only for professional

maintenance

7| RJ-45| 2*RJ-45 interface for RS485/CAN communication| Details shows in table5-6
8| Battery Output| Power terminal| –
9| Switch| Power switch| –
10| LCD| Liquid Crystal Display| Display battery information
11| GND| Module ground connection| –

NOTE

• The position or terminal block of the above-mentioned panel interfaces is different for different VT48100E ESS series products. Please refer to the corresponding product datasheet.

Indicator Description
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.

Table 5-2 Indicators Flash Mode

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.

Table 5-3 SOC Indicator Definition

The corresponding relationship between battery operation status and indicator operation status is shown in the following table.
Table 5-4 Battery Status and Indicator Operation Mode

Battery Status| Normal/ Abnormal| RUN| ALM|

SOC Indicators

|

Description

---|---|---|---|---|---
–| –| ●| ●| ●| ●| ●| ●| –
Power off/ Sleep|  |

OFF

|

OFF

|

OFF

|

OFF

|

OFF

|

OFF

|

–

Standby

|

Normal

|

Flash 1

|

OFF

|

According to SOC

| Flash mode shown in Table 5-2
Charge| Normal| Flash 2| OFF| According to SOC| –
Discharge| Normal| ON| OFF| According to SOC| –

Alarm

|

Abnormal

| According to the state of charge and discharge|

Flash 2

|

According to SOC

|

Recoverable

Error| Abnormal| OFF| ON| OFF| –

DIP Address

Please assign an address to the battery BMS through the DIP switch to communicate with the battery.

The relationship between DIP address and BMS address as below：

Table 5-5 Correspondence between BMS and DIP switch

Installation

Communication Port Definition

RJ 45 definition as below：

Table 5-6 RJ 45 Definition

NOTE

• The above is the definition of conventional communication, if you have special needs, please contact supplier or an authorized dealer.

Tools Preparation

ATTENTION

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.

Table 6-1 Installation

Open-pack Inspection

1. Move the battery to the nearby of site.
2. Use a claw hammer to open the box and check whether the items are complete.
3. Check the appearance whether there is damaged or leakage.

ATTENTION

The battery is heavy, if possible, please use tools to assist in handling.
NOTE

• Package contains VT48100E ESS series batteries, operation manual and accessories.
• If the battery is found to be damaged or leakage, please do not proceed to the next installation, and contact supplier or an authorized dealer in time.

Installation

1. Make sure the Power system is in off state.
2. Put the battery into cabinet or rack.
3. Use 4 M6x25 bolts to fix the battery pack on the cabinet.
4. Take out the ground wires and connect one end to the ground point of the battery pack and the other end to the ground point of the cabinet.

ATTENTION

The battery pack should be installed by professionally trained personnel, and it is strictly forbidden to install it without permission.
Use insulated tools during installation 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 battery pack is heavy, and at least 4 manpower must be prepared during the transportation and installation process. If possible, please use tools to assist in handling.

Cable Connection

Power Cable Connection

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. The last power cable connected to the charger or inverter needs to be configured according to the actual current that may exceed 100A.
• B. If the battery total input/output current more than 100A in parallel, the wiring method should configure bus-bars to connect the power cables.

Communication Cable Connection

Use the communication cable to connect the battery packs in series through the RS485/CAN communication port, and connect the battery packs at the end to the external device BMS port. The communication cable pins refer to“Table 5-6 RJ45 Definition”.

120Ω Resistor Connection
To ensure stable CAN communication with the external device/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 external device/Inverter.

Set Dial Address
Assign addresses to battery packs by dialing the dialing keys of the dialing switch. DIP switch address please refer to“Table 5-5 Correspondence between BMS and DIP switch”.

• A. When the battery and the external device use the CAN communication mode, the battery connected to the external device is set to 0, and the other packs are set to 1/2/3 in sequence.
• B. When the battery and the external device use the RS485 communication mode, the battery connected to the external device is set to 1, and the other packs are set to 2/3/4 in sequence.

ATTENTION

Before connecting cables, make sure that the bus-bars at the user end are in a power-off state.

Pay attention to the polarity of the battery pack.
Communication cables and power cables must be laid separately.
Connect the negative power cables of all battery packs first, and then connect the positive power cables of the battery packs.

Power On

Power-on Operation

1. Power on the charger/inverter at the user terminal.
2. Set the lithium 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. Otherwise indicating the battery is not work, you need to reconfirm whether the cables are connected well.

Power System Parameter Setting

Table 7-1 Parameter Setting

NOTE

• The content in the table is just our suggestion, and actually need to refer to the customer’s design requirements.
• The setting items of different chargers will be different.
• Follow strictly the power-on procedure to power on the battery pack, otherwise it will cause damage to the device or human body.
• Make sure the charger is powered on before turning on the Battery MCB/Switch.
• Must not change the parameters optionally in the site.

Shipment & Maintenance & Storage

• Batteries will continue charge/discharge until BMS protection if there is Lead-acid mode between battery and charger / Inverter.
• After VT48100E ESS series batteries goes into the sleeping status, please turn on the Battery MCB/Switch again or press the reset button.

Shipment

It is suitable for the transportation of vehicles, ships and airplanes. During transportation, shading, sun protection and civilized loading and unloading should be performed. The box containing the product is allowed to be transported by any means of transportation. In the process of loading and unloading, the battery should be handled with care to prevent falling, rolling, and heavy pressure. Avoid direct rain and snow and mechanical impact during transportation.
And here is the suggestion for the initial SOC before shipment by different transportation:

• Airplane: 30%
• Sea :50%
• Vehicle:50%

NOTE

• Whether the loading SOC status of the battery is allowed, you need to consult the relevant government transportation department.

Maintenance

Battery Maintenance Considerations

When maintaining the battery, it is required to use insulated tools or wrap the tools in insulation.

• DO NOT place any debris on the top of the battery.
• DO NOT use any organic solvents to clean the battery.
• DO NOT smoke or use naked flames near the battery.
• After the battery is discharged, the battery should be charged in time to avoid affecting the battery life.
• When not using the battery for a long time, please charge the battery to 40%~50% charged state. Long-term storage with low battery may damage the battery.
• All maintenance work must be carried out by professionals.

Routine Maintenance

The staff should perform visual inspection on VT48100E ESS series battery according to the inspection plan, please refer to the following table for maintenance.

Table 8-1 Routine Maintenance (Every three-month）

Battery Appearance

| The surface is neat and clean without stains.

The terminals are in good condition. The battery pack shell is intact, and there is no bumps, breaks, or leakage. The appearance of the battery pack does not leak.

No deformation or swelling of the shell.

| If the surface is dirty, clean the appearance of the battery pack with a cotton cloth.

The battery pack terminal is damaged, replace the cable.

If the appearance is damaged, leaking or deformed, take a photo and replace the defective battery pack.

Please contact supplier in time for other abnormal situations.

Alarm| No Alarm.| Find the solution as per alarm information.

NOTE

• Suggested routine maintenance for every three-month.

Table 8-2 Routine Maintenance (Every six-month）

(Suggested） Complete Cycle

|

Have a complete charge & discharge cycle under the equipment no lack of power.

| Check whether happens alarm action, and please check with the alarm list.

Please contact with supplier if the alarm still exists.

Cables

| There is no aging of the connecting wire and no cracking of the insulation layer.

The bolts at the cable connection are not loose.

|

Replace the faulty connection. Fastening bolts.

Battery Storage

• The recommended storage temperature is 15℃~35℃.
• Battery performance degradation after long-term storage, please shorten shelf time as possible as you can.
• Recharge charge before using to recover capacity loss of self-discharge during storage and transport.
• Storage battery should be at 40%-50%SOC when the battery is not used for a long time.
• Storage battery over 40°C or under 0°C will reduce battery life.
• Storage battery in dry and low temperature, well ventilated place.

If the battery is not used for a long time, the battery must be charged at regular intervals. The charging requirements are as follows：

Table 8-3 Battery Charge Requirement in Storage Status

SOC 3.Charge by 0.2C to 40%~50% SOC
0℃~20℃ or 30℃~40℃| Each 3 months

Trouble Shooting

Please refer to the table below to deal with common faults：

Table 9-1 FAQ

The indicator does not flash

| The power cable of the battery pack is not properly connected. The power switch is off.

The BMS is in a sleep state. BMS is damaged.

| Reconnect the power cable of the battery pack.

Turn on the power switch. Charge the battery pack.

Replace BMS.

Unable to discharge

|

The terminal of the battery pack is damaged.

BMS communication failure. The power switch is off.

| Replace the battery pack wiring terminals. Reconnect the communication line between the BMS and the battery pack. If the communication cable is damaged, replace the communication cable.

Turn on the power switch.

Unable to charge

|

The charger is malfunctioning. The terminal of the battery pack is damaged.

BMS communication failure. The power switch is off.

| Replace the charger.

Replace the battery pack wiring terminals. Reconnect the communication line between the BMS and the battery pack. If the communication cable is damaged, replace the communication cable.

Turn on the power switch.

Communication fail

| The power switch is off.

The BMS is in a sleep status. The communication cable is

damage.

| Turn on the power switch. Charge the battery pack. Replace the network cable.

Inaccurate voltage display

| The voltage sampling line is damaged.

BMS is damaged.

| Replace the voltage sampling line. Replace BMS.

Low capacity

| The battery pack has not been maintained for a long time. The single battery is damaged.

Inaccurate voltage sampling.

| Use an equalizer to maintain the battery pack. Replace the damaged single battery.

Replace the electrical sampling line or replace

the BMS.

Low cell voltage

| The battery pack has not been maintained for a long time. The single battery is damaged.

Inaccurate voltage sampling.

| Use an equalizer to maintain the battery pack. Replace the damaged single battery.

Replace the electrical sampling line or replace

the BMS.

Warranty

Except for the following and the conditions specified in the contract, you can go to supplier and authorized dealers for reasonable warranty and maintenance.

1. Failure of equipment caused by unauthorized disassembly and maintenance operations without the authorization of supplier and authorized dealers is not within the scope of the warranty.
2. Equipment damage caused by negligence during storage and transportation is not covered by the warranty.
3. The damage to the equipment caused by continuous overload work outside the electrical parameters of the equipment is not covered by the warranty.
4. Unauthorized testing of the equipment without the authorization of supplier and authorized dealers will not be covered by the warranty.
5. Non-equipment problems, adverse consequences caused by operation and matching problems are not covered by the warranty.
6. Equipment damage caused by natural forces, force majeure, and uncontrol- lable factors, such as earthquakes, typhoons, tornadoes, volcanic eruptions, floods, lightning, heavy snow, and wars, is not covered by the warranty.
7. If the product serial number is changed, blurred, or torn, it is not covered by the warranty.

Abbreviations

• BMS Battery Management System
• D Depth
• H Height
• LCD Liquid Crystal Display
• LFP LiFePO4
• MOSFET Metal-Oxide-Semiconductor Field-Effect Transistor
• NTC Negative Temperature Coefficient
• PC Personal Computer
• PCB Printed Circuit Board
• PCS Power Conversion System
• RTU Remote Terminal Unit
• SOC State of Charge
• W Width

References

• TAC.EU

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