V-TAC ESS Series User manual

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INSTRUCTION MANUAL
ESS SERIES BATTERY PACK
INTRODUCTION
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About This Document
Purpose
This document primarily introduces the main features, component composition, usage, installation, and
maintenance of Wall-mounted Residential Energy Storage System VE51280W (short for V-Power S14).
Intended Audience
This document is intended for:
Hardware installation engineers
Technical support engineers
Maintenance engineers
Users
Symbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol Definition Remarks
Danger Indicates a hazard with a high level of risk which, if not avoided, will
result in death or serious injury.
Warning Indicates a hazard with a medium level of risk which, if not avoided,
could result in death or serious injury.
Attention Indicates a hazard with a low level of risk which, if not avoided,
could result in minor or moderate injury.
Note
Supplements the important information in the main text.
NOTE is used to address information not related to personal injury,
equipment damage, and environmental deterioration.
Change History
Changes between the issued documents are cumulative. The latest document issued contains all the
changes made in earlier versions.
Issue 01 (2023-01-31)
This issue is the first official release.
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Contents
About This Document ..................................................................................................................1
1Introduction ..........................................................................................................................3
1.1 Application ........................................................................................................................................... 3
1.2 Appearance .......................................................................................................................................... 3
1.3 Panel Introduction................................................................................................................................ 4
1.4 PIN Definition ....................................................................................................................................... 6
1.5 Lithium-ion Cell .................................................................................................................................... 7
1.6 Technical specifications ........................................................................................................................ 8
2Installation ..........................................................................................................................10
2.1 Precautions for Installation ................................................................................................................ 10
2.2 Preparing for Installation.................................................................................................................... 10
2.2.1 Tools ............................................................................................................................................................... 10
2.2.2 Packing List..................................................................................................................................................... 11
2.2.3 Unpacking Acceptance................................................................................................................................... 12
2.3 Installing Guide................................................................................................................................... 12
2.4 Connecting Power Cable .................................................................................................................... 13
2.5Connecting Communication Cable ..................................................................................................... 16
3Operation............................................................................................................................18
3.1 Check before Power-on...................................................................................................................... 18
3.2 Power-on ............................................................................................................................................ 18
3.3 Operation Guide ................................................................................................................................. 19
4Maintenance .......................................................................................................................21
4.1 V-Power S14 Storage .......................................................................................................................... 21
4.2 Monthly Maintenance........................................................................................................................ 21
4.3 Quarterly Maintenance ...................................................................................................................... 22
4.4 Yearly Maintenance............................................................................................................................ 22
4.5 Alarm Handling................................................................................................................................... 22
Acronyms and Abbreviations......................................................................................................24
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1Introduction
1.1 Application
V-Power S14 is a next-generation product developed by VTAC, which is used in residential energy
storage solutions. This battery system has a capacity of 14.336 kWh.
V-Power S14 integrates the high-performance BMS. To extend battery life, it has multiple protection
functions such as system over-charge, system over-discharge, cell over-voltage, cell under-voltage,
charging over-current, discharging over-current, and insulation fault. It also has RS485 and CAN
communication to read battery module’s real-time data.
1.2 Appearance
The appearance of the V-Power S14 is shown as follows.
Figure 1. V-Power S14 appearance
The V-Power S14 dimensions are shown as follows:
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Figure 2. V-Power S14 dimensions (unit: mm)
1.3 Panel Introduction
The V-Power S14 operation panel is shown as follows.
Figure 3. V-Power S14 operation panel
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The definition of the V-Power S14 operation panel is shown as follows.
Table 1. Operation Panel Interface Definition
No. Items Remark
1 SOC State of Charge.
2 RUN/ALM Indicate battery module running or alarm status.
3 COM 1/COM 2
2*RJ45 Interface for communication:
COM1 for communication with inverter or the next battery;
COM2 for communication with the next battery.
4 Output connectors Battery module output connectors.
5 GND Grounding.
6 POWER Power Switch.
7 Bracket Mounting bracket.
The SOC indicator used to identify the current capacity status of V-Power S14. The number of flashing
indicators corresponds to different remaining capacity. The specific meaning is shown as follows.
Table 2. The SOC Indicator Definition
No. Indicator Light Remark
1 0% < SOC ≤25%
2 25% < SOC ≤50%
3 50% < SOC ≤75%
4 75% < SOC ≤100%
The corresponding relationship between operation status and indicator operation status is shown as
follows.
Table 3. The Run/Alarm Indicator Definition
No. Indicator Light Definition
1 Green LED Flash Indicates the V-Power S14 is charging or discharging.
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No. Indicator Light Definition
2 Green LED ON Indicates the V-Power S14 is in standby mode.
3 Red LED Flash Indicates the V-Power S14 is in alarm mode.
4 Red LED ON Indicates an error has occur in the battery module, which requires manual
operation or consultation with VTAC for maintenance.
1.4 PIN Definition
V-Power S14 has 2 communication interfaces: COM1 and COM2, the PIN definition of COM ports is
shown as follows.
Table 4. The Communication Port Definition
COM1/2 Pin Description
COM 1
1 RS485_B
2 RS485_A
3 CAN0-H (communicate with the next battery)
4 CAN1-H (communicate with inverter)
5 CAN1-L (communicate with inverter)
6 GND_RS485
7 CAN0-L (communicate with the next battery)
8 /
COM 2
1 /
2 /
3 CAN0-H (communicate with the next battery)
4 /
5 /
6 /
7 CAN0-L (communicate with the next battery)
8 /
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1.5 Lithium-ion Cell
The lithium iron phosphate cell selected in the scheme is a special energy-type lithium battery product.
This series of lithium iron phosphate cells have high specific energy, longer cycle life, low cost, capable of
high current charge and discharge, high-temperature tolerance, high energy density, safety, and pollution-
free features.
Lithium-ion cell's three views are shown as follows.
Figure 4. Lithium-ion cell three views (unit: mm)
Lithium-ion cell main technical specifications are shown as follows.
Table 5. Lithium-ion cell main technical specifications
No. Items Parameter
1 Battery type LiFePO₄
2 Rated voltage 3.2 V
3 Rated capacity 280 Ah
4 Rated energy 0.896 kWh
5 Max continuous charge current 200 A
6 Max continuous discharge current 200 A
7 Charging cut-off voltage 3.65V
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No. Items Parameter
8 Discharging cut-off voltage 2.80 V
9 Operating charging temperature 0℃-50℃
10 Operating discharging temperature -20℃-55℃
11 Storage temperature
0-45℃（less than 1 month）；
0-35℃（less than 12 months）；
12 Operating humidity 5%-95% RH
13 Size (Width*High*Depth) 173.7 mm×204.6 mm×72.0 mm
14 Weight Approx. 5.42 kg
1.6 Technical specifications
The V-Power S14's main technical specifications are shown as follows.
Table 6. V-Power S14 technical specifications
No. Items Parameter
1 Model VE51280W
2 The number of cells 16
3 Cells in series and parallel 1P16S
4 Rated voltage 51.2 V
5 Rated capacity 280 Ah
6 Rated energy 14.336 kWh
7 Charging cut-off voltage 57.6 V
8 Discharging cut-off voltage 44.8 V
9 Max continuous charge current 200 A
10 Max continuous discharge current 200 A
11 Communication method CAN/RS485
12 Maximum number of modules
allowed to be connected in parallel
Parallel expandable, ≤ 8 groups, without derating
More than 8 groups need to be derated.
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No. Items Parameter
13 Storage temperature 0℃~ 45℃
14 Operating temperature Discharge -20℃~ 55°C, Charge 0°C ~50℃
15 SOC estimation value <8%
16 Allowable relative humidity 5% ~ 95% Non-condensing
17 Altitude 2000m without derating
18 Cooling method Natural heat dissipation
19 Protection level IP65
20 External Interface
Battery positive and negative quick plug terminals:
2*P+, 2*P-
Communication standard RJ45 port:2*RJ45
21 Installation method Floor
22 Display method Indicator light (power, operation status)
23 Size (Width*High*Depth) 505.0 mm×801.5 mm×251.0 mm (without base)
24 Net weight Approx. 121 kg
Protection function
25 Over-voltage protection System over-voltage, cell over-voltage
26 Under-voltage protection System under-voltage, cell under-voltage
27 Over-current protection Charging over-current, discharging over-current
28 Temperature protection
Charging high temperature, charging low temperature,
discharging high temperature, discharging low
temperature
29 Short circuit protection BMS hardware protection, external fuse
30 Reverse connection protection Available, when it is powered off
31 Dielectric withstand test Available
32 Pre-charge function Available
33 Equalization function Available
34 Hibernation function Available
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