SEPLOS SUTEN-W User manual

Shenzhen Seplos Technology Co,. Ltd
Please read this manual carefully before operating
and retain it for future reference.

SEPLOS SUTEN-W51.2V 100AH LIFEPO4 BATTERY PACK USER MANUAL www.seplos.com
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This manual introduces SUTEN-W designed by SEPLOS Technology. Please read this manual before installation of
the battery module and follow the instruction carefully during the assembly. Any confusion, please contact
SEPLOS Technology immediately for advice and clarification.
CONTENT
1. Safety Precautions .................................................................................................................................................... 1
1.1 Precautions ..................................................................................................................................................... 1
1.2 Warning ...........................................................................................................................................................1
2. Introduction .............................................................................................................................................................. 3
2.1 Features ...........................................................................................................................................................4
2.2 Specifications .................................................................................................................................................. 5
2.2.1 Recommended Continuously Discharge Current ..............................................................................12
2.2.2 Recommended Continuously Charge Current ...................................................................................12
2.3 Interfaces ...................................................................................................................................................... 13
2.4 Cell Features ..................................................................................................................................................16
2.4.1 Specifications ..................................................................................................................................... 16
2.5 Advanced Battery Management System (BMS) ........................................................................................... 17
2.5.1 BMS Functions ................................................................................................................................... 17
2.5.2 BMS Upper Computer System ...........................................................................................................18
2.5.3 Compatible Inverters ......................................................................................................................... 18
3. Installation ...............................................................................................................................................................21
3.1 Application .................................................................................................................................................... 21
4. List ........................................................................................................................................................................... 22
4.1 Packing list .....................................................................................................................................................22
4.2 Optional Accessories .....................................................................................................................................23
5. Appendix ................................................................................................................................................................. 24

SEPLOS SUTEN-W51.2V 100AH LIFEPO4 BATTERY PACK USER MANUAL www.seplos.com
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1. Safety Precautions
This section describes the safety information that must be observed when working with battery
packs. To prevent any damages, or personal injury, and to ensure the performance of the battery
packs, please read this section carefully and observe the safety precautions at all times.
1.1 Precautions
It is very important and necessary to read the user manual carefully before installing or using
the product. Failure to do so or to follow any of the instructions or warnings in this document
can result in electrical shock, serious injury or death, and could damage the battery, or
potentially rendering it inoperable.
If the battery pack is stored for long time, it is required to charge them every six months, and
the SOC should be no less than 90%.
Please recharged the battery pack within 12 hours, after fully discharged.
All the battery pack terminals must be disconnected before any maintenance.
Do not use cleaning solvents to clean battery pack.
Do not expose battery pack to flammable or harsh chemicals, or corrosive gases or liquids.
Do not paint any part of battery pack, include any internal or external components.
Do not expose the battery pack to direct sunlight for extended periods of time.
Do not connect battery pack with PV solar wiring directly.
Do not insert any foreign object into any part of the battery pack.
1.2 Warning
Do not touch the battery pack with wet hands.
Do not crush, drop or puncture the battery pack.

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Always dispose of the battery pack according to local safety regulations.
Store and recharge the battery pack in a manner in accordance with this user manual.
Ensure reliable grounding.
Do not reverse the polarity when installing.
Do not short circuit the terminals, remove all jewelry items that could cause a short circuit before
installation and handling.
Disconnect battery from power or loads, and then power off battery before installation and
maintenance.
The battery packs should be not stacked more than specified numbers.
Continued operation of a damaged battery pack can result in dangerous situation.

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2. Introduction
SUTEN-W
SUTEN-W lithium iron phosphate battery pack is a household wall mounted renewable energy
storage battery pack developed and produced by SEPLOS Technology. It is a low-voltage DC battery
system with an operating voltage of 48V, and works with a low voltage inverter to realize the goal
of energy storage for home application.
SUTEN-W battery pack supports parallel connection to expand capacity, which can meet various
capacity requirements. It has built-in battery management system(BMS), which can manage and
monitor the pack and cells information including voltage, current and temperature. What’s more,
BMS can balance cells charging and discharging to extend cycle life.

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2.1 Features
SUTEN-W comes with a LCD display for pack voltage, capacity and temperature monitoring.
The battery cell used inside, is 16 pieces of 3.2V 100Ah aluminum case prismatic cell.
Battery cell is made from lithium iron phosphate (LiFePO4) with safety performance and longer
cycle life.
Special designed plastic cell holder, holding 8 cells in series, and composes a battery module,
and two modules in series, then connected with BMS, composes the wall-mounted type
battery pack.
BMS has over-discharge, over-charge, over-current, high and low temperature warning and
protection functions.
BMS monitors charge and discharge state, and balance current and voltage of each cell.
BMS comes with upper computer system for real-time cell and pack voltage, current,
temperature, and battery status monitoring and recording.
Flexible configuration, max. 15 packs can be connected in parallel for expanding capacity and
power with 8 DIP switches.
Working temperature range is from -10℃~50℃(Charging 0℃~50℃; discharging -10℃~50℃)
with excellent discharge performance and cycle life.
Pre-programmed with multi-protocols, and works with multi-brands of inverters.

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2.2 Specifications
Basic Parameters
SUTEN
Nominal Voltage (V)
51.2V
Nominal Capacity (Ah)
100Ah @0.5C discharge current
25±2℃
Rated Capacity (Ah)
98-105Ah @0.5C discharge current
25±2℃41.6V - 57.6V
Nominal Power (Wh)
5.12KWh
Dimension (mm)
565*450*180mm
Weight (Kg)
53±5KG
Discharge Cut-off Voltage (V)
43.2V/2.7V
Charge Voltage (V)
57.6V/3.65V
Continuously Charging Method
Charge at constant current 50A until total
voltage reaches 57.6V or 3.65V/cell, which is
sooner.
Standard Discharge Method
Discharge at constant current 50A until
total voltage reaches 43.2V or 2.7V/cell,
which is sooner.
Communication Interface
CAN,RS485
Configuration
2*1P8S
Working Temperature
0～50℃(Charge)
-10～50℃(Discharge)
-20～55℃(Storage)
Cell chemistry
Lithium iron phosphate (LiFePO4)
Cycle life
≥80% capacity state after 4800 cycles at
0.5C, 25℃, 100% DOD
IP level
IP 20
Humidity
10% - 85%
Certificates
CE, ROHS, MSDS, UN38.3

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2.2.1 BMS Parameters and Settings
Byt
e 1
Bits
Default
Level
Conditions
Release
Response
Remark
conditions
dura
tion
Response
BMS
Bit
0
Pack over
voltage
2
Pack voltage
＞57.6v
1s
1. Pack voltage ＜
56.0V
2. Remaining
capacity ≤
96%SOC
3. Individual cell
voltage decrease to
over voltage
recovery value
(Neither 2
conditions will get
the default
released.)
Pack over
voltage
warning
No
charging
mark
Charging
MOSFET will
be turned
off
The
charging
status
will not
report to
the first
class
warning
1
Pack voltage
＞56V
3s
Pack voltage ＜
54.4V
Warning
Warning
Bit
1
Pack
under
voltage
2
Pack voltage
＜43.2V
1s
Pack voltage ＞
46.0V
Charging current
≥1A
Pack
under
voltage
warning
No
dischargi
ng mark
If the
inverter do
not
response
after 1
seconds, the
discharging
MOSFET will
be cut off
1
3s
Pack voltage ＞
48.0V
Warning
Warning
Bit
2
High SOC
2
-
--
--
--
--
Low SOC
2
SOC＜5%
1S
SOC＞5%
Low SOC
warning
No
charging
mark
1
SOC＜10%
3S
SOC＞10%
Warning
Warning
Bit
3
Charging
over
current
3
Charging
current ≥
100A
1s
When charging
current ≤100A
Discharge
Charging
over
current
warning
Charging
MOSFET will
be cut off

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No
charging
mark
Charging
current
limiting
2
Charging
current≥95A
1s
When charging
current ≤95A
Discharge
When the charging current limiting
functions, if the charging current is
higher than 95A, the charging
current will limited to 10A for 5
minutes, when the detecting current
is lower than 95A, it will back to
normal charging status, but if the
BMS detects the charging current is
higher than 95A for the second time,
it will charging with 10A until the
100% charged.
Bit
4
Discharge
over
current
3
Discharge
current ＞
100A
1s
Discharge current
≤100A
Power off
Discharge
over
current
warning
No
discharge
mark
If the
inverter
do not
response
after 1
second,
the
discharge
MOSFET
will be cut
off
1
Discharge
current＞95A
3s
Discharge current
≤90A
Warning
warning
Byt
e 2
Bit
5
Charging
over
temperatu
re
2
Max
temperature
＞54℃
1s
Max temperature
＜50℃
Ask for a
charging
current of
0A
No
charging
mark
If the
inverter
do not
response
after 1
second,
the charge
MOSFET
will be cut
off
1
Max
temperature
＞50℃
3s
Max temperature
＜45℃
Warning
Half of the
charging
current
Bit
6
Charging
low
temperatu
re
2
Min
temperature
＜0℃
1s
Min temperature
＞5℃
Or charging
termination
Ask for a
charging
current of
0A
If the
inverter
do not
response

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No
charging
mark
after 1
second,
the charge
MOSFET
will be cut
off
1
Min
temperature
＜2℃
2s
Min temperature
＞4℃
Warning
Warning
Bit
7
Discharge
over
temperatu
re
2
Max
temperature
＞54℃
1s
Max temperature
＜50℃
Discharge
over
temperatu
re warning
No
charging
mark
If the
inverter
do not
response
after 1
second,
the
discharge
MOSFET
will be cut
off
1
Max
temperature
＞50℃
3s
Max temperature
＜45℃
Warning
Warning
Bit
8
Discharge
low
temperatu
re
2
Min
temperature
＜-10℃
1s
Min temperature
＞0℃
Low
temperatu
re warning
No
discharge
mark
If the
inverter
do not
response
after 1
second,
the
discharge
MOSFET
will be cut
off
1
Min
temperature
＜-5℃
3s
Min temperature
＞0℃
Warning
Prompt
Bit
9
Individual
cell over
voltage
2
Individual cell
voltage ＞
3.65V
1s
1. Max individual
cell voltage ＜3.5V
2. Remaining
capacity ≤96%
3. Discharge
current ≥1A
Either 2 conditions
Ask for a
charging
current of
0A
No
charging
mark
The
charging
MOSFET
will cut off

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would recover
charging
1
Individual cell
voltage ＞
3.50V
3s
Max individual cell
voltage ＞3.50V
Warning
Warning
The
charging
status will
not report
to the first
class
warning
Bit
10
Individual
cell under
voltage
during
charging
3
Individual cell
voltage ＜
1.50V
1s
Individual cell
voltage ＞1.50V
Ask for a
charging
current of
0A
No
charging
mark
If the
inverter
do not
response
after 1
second,
the
discharge
MOSFET
will be cut
off
Bit
11
Individual
cell under
voltage
during
dischargin
g
2
Individual cell
voltage ＜
2.70V
3s
Min individual cell
voltage ＜2.90V
Charging current
≥1A
Warning
Prompt
Bit
12
Individual
cell
voltage
inconsis
tency
2
Voltage
difference ＞
500mv
3s
Voltage difference
＜300mv
Stop
charge
and
discharge
If the
voltage
difference
sustained
for 3
seconds,
the
charging
and
dischargin
g MOSFET
will be cut
off
1
Voltage
difference ＞
300mv
5s
Voltage difference
＜250mv
Voltage
difference
warning
Prompt
Byt
e 3
Bit
13
Ambient
over
2
Temperature
＞60℃
1s
Temperature ＜
55℃
Ambient
temperatu
If the
inverter

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temperatu
re
re over
temperatu
re warning
No
charging
and
dischargin
g mark
do not
response
after 2
seconds,
the
charging
and
dischargin
g MOSFET
will be cut
off
1
Temperature
＞50℃
3s
Temperature ＜
47℃
Warning
Prompt
Bit
14
Ambient
under
temperatu
re
2
Temperature
＞-10℃
1s
Temperature ＜
0℃
Ambient
temperatu
re under
temperatu
re warning
No
charging
and
dischargin
g mark
If the
inverter
do not
response
after 2
seconds,
the
charging
and
dischargin
g MOSFET
will be cut
off
1
Temperature
＞0℃
3s
Temperature ＜
3℃
Warning
Prompt
Byt
e 4
Bit
15
PCB over
Temperat
ure
2
Temperature
＞10℃
1s
Temperature ＜
0℃
PCB
temperatu
re over
temperatu
re warning
No
charging
and
dischargin
g mark
If the
inverter
do not
response
after 2
seconds,
the
charging
and
dischargin
g MOSFET
will be cut
off
1
Temperature
＞0℃
3s
Temperature ＜
3℃
Warning
Prompt
PCB under
2
Temperature
1s
Temperature ＜
PCB
If the

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Temperat
ure
＞100℃
85℃
temperatu
re under
temperatu
re warning
No
charging
and
dischargin
g mark
inverter
do not
response
after 2
seconds,
the
charging
and
dischargin
g MOSFET
will be cut
off
1
Temperature
＞90℃
3s
Temperature ＜
85℃
Warning
Prompt
Byt
e 5
Bit
16
Short
circuit
protection
Short circuit protection time
delay
50-120us
Short
circuit
warning
No
charging
mark
Charging
and
dischargin
g MOSFET
will be cut
off
Short circuit lock times
5 times
Short circuit lock
release conditions:
default disappear or
charging
Short circuit recovery
default disappear or charging
Byt
e 6
Bit
17
Cell
balancing
Cell balancing start
conditions
Equalization start voltage
3350mv
Voltage difference
30mv
Equalization stop voltage
difference
20mv
Cell balancing start
temperature range
Equalization temperature
limitation
According to the
ambient temperature
range
Equalization high
temperature prohibition
50℃
Equalization low
temperature prohibition
0℃

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2.2.2 Recommended Continuously Discharge Current
Temperature
SOC
0% - 20%
SOC
20% - 40%
SOC
40% - 80%
SOC
80% - 100%
-10 - 0℃
10A
10A
50A
50A
0 - 7℃
15A
50A
60A
80A
7 - 15℃
20A
40A
70A
90A
15 - 25℃
30A
70A
100A
100A
25 - 45℃
30A
70A
100A
100A
45 - 50℃
10A
30A
40A
50A
50 - 55℃
5A
15A
20A
30A
2.2.3 Recommended Continuously Charge Current
Temperature
SOC
0% - 20%
SOC
20% - 40%
SOC
40% - 80%
SOC
80% - 100%
-10 - 0℃
10A
10A
8A
5A
0 - 7℃
20A
20A
15A
10A
7 - 15℃
50A
50A
40A
20A
15 - 25℃
80A
80A
60A
30A
25 - 45℃
100A
100A
60A
30A
45 - 50℃
80A
80A
50A
20A
50 - 55℃
50A
50A
40A
15A

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2.3 Interfaces
LCD Screen
LCD screen displays the battery pack, and the individual cell voltage, capacity, temperature
information by clicking the ‘confirm’, ‘exit’, ‘up’ and ‘down’ button besides.
RESET
Reset button: to start the battery pack, hold the button for 2s to turn on battery pack.
RS485
RS485 communication interface: RJ45 port, follow RS485 protocol. For transmitting battery pack
information between paralleled packs. The first 4 DIP switches (#1, #2, #3, #4) are used for
identifying packs’ information on software.
CAN
CAN 5 communication interface: follow CAN BUS protocol, for output pack information to inverter.
One pack should be assigned as master pack. And the last 4 DIP switches (#5, #6, #7, #8) to tell how
many slave packs are followed. The firs DIP switches are used for identifying slave packs.
ADS
ADS Switch: To setup battery address for identification, and make the communicate between

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batteries, battery to inverter.
NOTE: There are 8 bit DIP switches, keep the switch on down side means ‘OFF’, turn up the switch to top side
means ‘ON’.
ALARM
ALARM light: red LED flash to show the battery alarm status. And red light to show the battery in
protection status of abnormal temperature, over-current, or short-circuit.
RUN
Working light: green LED to show the battery working status. Details as follows,
Battery
status
Operating
Mode
RUN
ALM
LED Light
Remark
●
●
●
●
●
●
Power off
Standby
OFF
OFF
OFF
OFF
OFF
OFF
OFF
Standby
Normal
Solid Green
OFF
According to battery SOC status
Standby
mode
Charge
Mode
Normal
Solid Green
OFF
According to battery SOC status
Over current
warnings
Solid Green
Blink type 2
Over voltage
protection
Blink type 1
OFF
OFF
OFF
OFF
OFF
Temperature,
over current
protection
Blink type 2
OFF
OFF
OFF
OFF
OFF
Discharge
Mode
Normal
Blink type 3
OFF
According to battery SOC status
Warning
Blink type 3
Blink type 3
Over current,
temperature,
short-circuit
protection
OFF
Solid Red
OFF
OFF
OFF
OFF
Termination
of discharge
Under voltage
protection
OFF
OFF
OFF
OFF
OFF
OFF
Termination
of discharge

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CAPACITY
SOC light: 4 green LED lights to show the capacity status of battery pack. Each LED represents 25%
the capacity.
P+/P-
Power terminals: two pairs of power terminals with the same function, one connect to equipment,
and the other one parallel to other battery pack for capacity expanding. For a single pack, both
terminals can achieve charging and discharging functions.
Power cable uses 6.0mm power plug with lock button. And can be full rotation.
Status
Charge
Discharge
Capacity
indicator
●L4
●L3
●L2
●L1
●L4
●L3
●L2
●L1
0-25%
OFF
OFF
OFF
Blink
OFF
OFF
OFF
Solid Green
25%-50%
OFF
OFF
Blink
Solid Green
OFF
OFF
Solid Green
Solid Green
50%-75%
OFF
Blink
Solid Green
Solid Green
OFF
Solid Green
Solid Green
Solid Green
>75%
Blink
Solid Green
Solid Green
Solid Green
Solid Green
Solid Green
Solid Green
Solid Green
Operating
indicator
Solid Green
Blink

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2.4 Cell Features
2.4.1 Specifications
SEPLOS 3.2V 100Ah lithium iron phosphate (LiFePO4) aluminum case prismatic rechargeable
battery cell.
Refer to the cell specification for more detailed information.
SEPLOS Technology applies high quality Grade A cells inside the battery box. And did the following
designs to prolong the battery pack cycle life.
Judging by the current testing report below, if the battery pack charging and discharging at
0.2C, the battery pack could reach a cycle life of 6000 times or more at the remaining capacity
of 80% capacity state at 25℃room temperature, 100%DOD.
Nominal Voltage
3.2V
Nominal Capacity
100Ah
Weight
≤2.25Kg
Self-discharge Rate
≤3.5% per month
Initial Internal
Resistance（1KHz）
≤0.35mΩ

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The real capacity of each single cell is 105Ah.
The module inside comes with 16 cells in parallel. And the default setting of BMS pack
discharge end voltage is for 15 cells in series.
2.5 Advanced Battery Management System (BMS)
The BMS is applied to monitor current, voltage, temperature, protection against over-charge,
over-discharge, over-current, over-temperature, under-temperature and short circuit. The BMS
provides cell balancing and current limitation during charging process to ensure a reliable safety
and performance.
2.5.1 BMS Functions
Over charge protection
Over discharge protection
Over current protection
Cell balancing
Temperature protection
CAN and RS485 communication
Refer to the BMS specification for the detailed information

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2.5.2 BMS Upper Computer System
Battery pack can be remotely monitored with SEPLOS BATTERYMONITOR software. With this
software, battery voltage, cell voltage of single cell and pack, SOC status, cell temperature, voltage
differences can be monitoring in real time. Through history record, battery status can be checked
afterwards.
Note: Download the software installation file at Google drive with this link:
https://drive.google.com/drive/folders/10pxgNLHovcDZRVGrCZsSkfecBrRw-AdW?usp=sharing
2.5.3 Compatible Inverters
To make sure that the battery module works perfectly, it would be better to use the compatible
inverters listed below. SUTEN battery module compatible with CANBUS protocol.
Pre-programmed CAN Protocol list:
Goodwe-V1.5
Pylon-V1.3