Sofar solar AMASS GTX2500 User manual

Shenzhen SOFARSOLAR Co., Ltd.
Lithium-Ion Storage Battery
Product Model: GTX2500
User manual
Version 1.1

AMASS GTX2500 User manual
Copyright © Shenzhen SOFARSOLAR Co., Ltd
I
Contents
1General Information....................................................................................... 1
1.1 Validity .............................................................................................. 1
1.2 Intended Use...................................................................................... 1
1.3 Identifying The Product..................................................................... 3
2Safety ............................................................................................................. 5
3Technical Data................................................................................................ 7
4Technical Items .............................................................................................. 9
5Product Overview..........................................................................................11
5.1 Brief Introduction .............................................................................11
5.2 Interface Introduction .......................................................................12
5.2.1 Start Button ..............................................................................13
5.2.2 LED Indicator Definition .........................................................14
5.2.3 Link Port and Automatic Coding Function...............................15
5.2.4 CAN / RS485 Port....................................................................16
5.2.5 RS232 Port ...............................................................................17
5.2.6 Output Dry Contact Terminal...................................................17
5.2.7 Extend LCD Terminal ..............................................................18
6Installation Guide..........................................................................................19
6.1 Checking Before Installation ............................................................19
6.1.1 Checking Outer Packing Materials...........................................19
6.1.2 Checking Deliverables .............................................................20
6.2 Tools .................................................................................................22
6.3 Installation requirements ..................................................................22

AMASS GTX2500 User manual
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6.3.1 Installation environment requirements.....................................22
6.3.2 Installation carrier requirements...............................................23
6.4 Installation Instructions ....................................................................24
6.4.1 Dimensions...............................................................................24
6.4.2 Installation Step........................................................................25
7Cleaning and Maintenance............................................................................33
7.1 Cleaning............................................................................................33
7.2 Maintenance......................................................................................33
7.2.1 Recharge Requirements During Normal Storage .....................33
7.2.2 Recharge Requirements When Over Discharged (90%DOD)..34
8Compatible Inverter List ...............................................................................35
9Common Issues and Solutions ......................................................................37
9.1 Common Issues and Solutions..........................................................37
9.2 Emergency........................................................................................39

AMASS GTX2500 User manual
Copyright © Shenzhen SOFARSOLAR Co., Ltd
1
1General Information
This manual introduces AMASS GTX2500 LFP Battery Product from SOFAR.
Please read this manual before you use the battery.
Any confusion, please contact SOFAR immediately for advice and clarification.
1.1 Validity
This user manual is applicable to AMASS GTX2500.
This user manual contains AMASS GTX2500 product information, usage
guidance, safety information, installation guide and details on common operating
issues and subsequent corrective actions.
1.2 Intended Use
AMASS GTX2500 is an energy storage unit that is designed to be used in
residential on-grid applications with the capability for short-term backup.
Notes regarding intended use:
AMASS GTX2500 is not suitable for supporting life-sustaining medical devices.

AMASS GTX2500 User manual
Copyright © Shenzhen SOFARSOLAR Co., Ltd
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This product is intended for use only in accordance with the information provided
in the enclosed documentation and with the locally applicable standards and
regulations. Any other application may cause personal injury or property damage.
The illustrations in this manual are meant only to help explain system
configuration concepts, includes usage guidance, safety precautions, and common
operating issues and subsequent corrective actions.
Alterations to the product, e.g. changes or modifications, are only permitted with
the express written permission of SOFAR. Unauthorized alterations will void
warranty claims. SOFAR shall not be held liable for any damage caused by such
changes. Any use of the product other than that described in the Intended Use
section does not qualify as appropriate. The enclosed documentation is an integral
part of this product. Keep the documentation in a convenient place for future
reference and observe all instructions contained therein. The type label (see
Section 1.3) must remain attached to the product.
AMASS GTX2500 series products must work with compatible inverters which are
listed in the “Compatible Inverter List” section of this manual.
Please contact SOFAR or local after-service providers within 1 week once the user
decides to cease using their SOFAR Battery products.

AMASS GTX2500 User manual
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1.3 Identifying The Product
The type labels were attached on the product, which contain the product
identification information. For safe usage, the user must be well-informed of the
contents in the type labels.
The type labels include:

AMASS GTX2500 User manual
Copyright © Shenzhen SOFARSOLAR Co., Ltd
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AMASS GTX2500 User manual
Copyright © Shenzhen SOFARSOLAR Co., Ltd
5
2Safety
This section contains safety information that must be observed at all times when
working on or with batteries. To prevent personal injury or property damage and
to ensure long-term operation of the batteries, read this section carefully and
observe all safety information at all times.
WARNING
Environmental Requirement
℃
eat sources
ive objects such as
wires

AMASS GTX2500 User manual
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Operation Precautions
the polarity or connect in series
short circuit before installation and handling
battery in a manner in accordance with this user manual
installation and maintenance
ive
package
stipulated on the package
may cause severe injury due to electrical shock.

AMASS GTX2500 User manual
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3Technical Data
Basic Parameters
Specification
Nominal Capacity（Ah）
50AH
Nominal Voltage（V）
51.2Vdc
Total Energy
2500Wh
Usable Energy(90% DOD)
2250Wh
Charge Voltage（V）
55.68~56.16Vdc
Discharge Voltage（V）
45.6-56.16Vdc
Nominal Charge Current(A)
25A
MAX. Charge Current(A)
30A
Nominal Discharge Current(A)
25A
Max. Discharge Current(A)
30A（1.5kw）
Communication
RS232、RS485、CAN
Working Temperature
-20℃~ 60℃
Storage Temperature
≤25℃，12 months;
≤35℃，6 months;
≤45℃，3 months
Operating humidity
≤95%RH
Storage humidity
≤95%RH
Max.Operating Altitude
≤2000m
Scalable
Up to 4
Enclosure Protection Rating
IP20

AMASS GTX2500 User manual
Copyright © Shenzhen SOFARSOLAR Co., Ltd
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Net Weight(Kg)
27Kg
Dimension（mm）
400mm*417mm*120mm
Certification
IEC62619、UN38.3、IEC62040-1、SAA etc.
Cycle Life
6000 Cycles @ 80% DOD / 25℃/ 0.5C，60% EOL
Note:
Operating current derating according to cell voltage and battery temperature.

AMASS GTX2500 User manual
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4Technical Items
No.
Terms
Comment
1
Discharge
Battery output power for load
2
Charge
To put electricity into battery by charger
3
Full charge
Battery had been full charged, SOC is 100%.
4
Standby
Ready for charging or discharging
5
Shutdown
Power off
6
SOC
State of Charge(Useable capacity)
7
Battery voltage
The voltage between B+/B-
8
Cell voltage
Single cell voltage
9
Pack voltage
The voltage between P+/P-
10
Alarm
Indicate that the battery is in abnormal status
11
Protect
Battery stops charging or discharging and is
recoverable
12
Fault
Battery or BMS is broken, need to be replaced
13
Over discharged
Battery is lack of electricity, and needs to be
recharged in time

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AMASS GTX2500 User manual
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5Product Overview
5.1 Brief Introduction
Product overview
AMASS GTX2500 is a battery system with an operating voltage range between
45.6~56.16V. It is utilized in household energy storage applications and works
together with a low-voltage inverter to realize the goal of energy storage for the
home.
AMASS GTX2500 has built-in BMS (battery management system), which can
manage and monitor cells information including voltage, current and temperature.

AMASS GTX2500 User manual
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What’s more, BMS can balance cells charging to extend cycle life. BMS has
protection functions including over-discharge, over-charge, over-current and
high/low temperature; the system can automatically manage charge state,
discharge state and balance state.
Multiple batteries can connected in parallel to expand capacity and power for
larger capacity and longer power supporting duration requirements, AMASS
GTX2500 support up to 4 parallel operation.
5.2 Interface Introduction
No.
Items
No.
Items
1
LED Indicator
6
Link Port In
2
Start Button
7
Link Port Out
3
Power Terminals
8
RS232
4
Extend LCD Interface
9
CAN/RS485
5
Dry Contact Terminal
10
Grounding

AMASS GTX2500 User manual
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5.2.1 Start Button
1、Press start button more than 3s and then release the button, LED will lights
from L8 to L1, and then enters to automatic coding, all LED lights flash. After the
automatic coding, L1 to L6 shows the normal capacity, and L7/L8 shows the
running status:
L8: Green, long lighting when charging and flash when discharging.
L7: Red, long bright if equipment failure or protected.
2、In parallel system, connect the parallel communication wiring according to
section 6.4.2, then long press the start button of the Master PACK, after normal
startup, the battery system will automatically encode and assign ID to each
parallel PACK, and then the parallel system will run normally.
3、Shut down the battery system: Press start button of Master PACK more than 3s
and then release the button, LED will lights from L1 to L8 to shut down the
battery module. In parallel system, the master pack will shut down after all slave
packs shut down.

AMASS GTX2500 User manual
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5.2.2 LED Indicator Definition
L1 to L6: Green, show the battery level.
L8: Green, long lighting when charging and flash when discharging.
L7: Red, long bright if equipment failure or protected.
LED Indicators Instructions
Charging Battery Level Indicators Instructions
RUN ALM
L8 L7 L6 L5 L4 L3 L2 L1
OFF OFF OFF OFF OFF OFF OFF OFF AllOFF
Flash 1 OFF Indicates Standby
Normal Light OFF
The highest capacity indicator LED
flashes(flash 2),others lighting
FullCharged Light OFF Light Light Light Light Light Light Turn to standby status when charger off
Protection OFF Light OFF OFF OFF OFF OFF OFF Stop charging
Normal Flash 3 OFF
UVP OFF OFF OFF OFF OFF OFF OFF OFF Stop charging
Protection OFF Light OFF OFF OFF OFF OFF OFF Stop discharge
OFF Light OFF OFF OFF OFF OFF OFF Stop charging and Discharge
Battery Level Indicator
Descriptions
Status
Fault
Discharge
According to the battery level
Shut down
Standby
According to the battery level
Charging
According to the battery level
L8 L7 L6 L5 L4 L3 L2 L1
0～17% OFF OFF OFF OFF OFF Flash 2
18～33% OFF OFF OFF OFF Flash 2 Light
34～50% OFF OFF OFF Flash 2 Light Light
51～66% OFF OFF Flash 2 Light Light Light
67～83% OFF Flash 2 Light Light Light Light
84～100% Flash 2 Light Light Light Light Light
Full Charged Light Light Light Light Light Light
Charging
Light
OFF
Battery Level
（%）
Status
Battery Level Indicator

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Discharging Battery Level Indicators Instructions
Note: The flashing instructions, flash 1 - light 0.25s / off 3.75 seconds; flash 2 -
0.5s light / 0.5s off; flash 3 - 0.5s light / 1.5s off.
5.2.3 Link Port and Automatic Coding Function
Link Port In / Link Port Out Communication follow RS485 protocol, for
communication between multiple parallel batteries.
After confirming the wiring is correct(refer to section 6.4.2), long press the startup
button of the Master PACK, after normal startup, the parallel battery system will
automatically code and assign ID to each parallel PACK, and then the parallel
system will run normally(refer to section 5.2.1).
L8 L7 L6 L5 L4 L3 L2 L1
0～17% OFF OFF OFF OFF OFF Light
18～33% OFF OFF OFF OFF Light Light
34～50% OFF OFF OFF Light Light Light
51～66% OFF OFF Light Light Light Light
67～83% OFF Light Light Light Light Light
84～100% Light Light Light Light Light Light
Status
Discharge
Battery Level Indicator
Battery Level
（%）
Flash 3
OFF

AMASS GTX2500 User manual
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5.2.4 CAN / RS485 Port
PIN
Definition
Pin 1、Pin 8
RS485-B （to PCS, reserved）
Pin 2、Pin 7
RS485-A （to PCS, reserved）
Pin 3
NC
Pin 4
CANH（to PCS）
Pin 5
CANL（to PCS）
Pin6
GND
CAN / RS485 Communication Terminal (RJ45 port) follow CAN protocol /
RS485 protocol, connect to Inverter.
1、BMS controls the charging current/charging voltage or discharge
current/discharge cut-off voltage of the PCS through CAN communication
according to the battery voltage and battery temperature.
2、If the battery capacity is less than 8%, BMS controls the PCS to make
compulsory recharge through the CAN communication to avoid the damage
of the battery due to deep discharge.
3、If SOC was less than 97% for one consecutive month, BMS controlled PCS
by CAN communication to full charge the battery to corrected SOC and fully
charged capacity.
Note: Through Sofar Solar PCS, customers can set the fully charged time

AMASS GTX2500 User manual
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period, which is from 3AM to 6AM by default.
5.2.5 RS232 Port
RS232 Communication Terminal(RJ45 port) follow RS232 protocol, for
manufacturer or professional engineer to debug or service.
PIN
Definition
Pin 8、Pin 1
GND
Pin 2、Pin 7
RS232_TX
Pin 3、Pin 6
RS232_RX
Pin 4、Pin 5
NC
5.2.6 Output Dry Contact Terminal
Dry Contact Terminal: provided 2 output dry contact signal.
Pin
Definition
Note
1 / 2
Prohibit Charging
Maximum load capacity ：
30V/1A
3 / 4
Prohibit Discharging