installation manual - solarmax...
TRANSCRIPT
LI-MAX TECHNOLOGY INC. 3080 12th Street, Riverside, CA 92507
Version 1.5 (120Vac)
Energy Storage System
- For Residential Use
INSTALLATION MANUAL
1
Table of Contents
PURPOSE & SCOPE ........................................................................................................................................... 1
Purpose ............................................................................................................................................................ 1
Scope ............................................................................................................................................................... 1
SAFETY INSTRUCTIONS .................................................................................................................................. 1
OUR SYSTEM ..................................................................................................................................................... 3
Features ........................................................................................................................................................... 3
System Overview ............................................................................................................................................. 3
The Subsystems .............................................................................................................................................. 4
Energy Storage (BMT-ES5000R) .................................................................................................................... 4
Functions & Outlets .......................................................................................................................................... 4
Inverter/Charger (BMT-CU2000R) ................................................................................................................... 5
Functions & Outlets .......................................................................................................................................... 5
INSTALLATION ................................................................................................................................................. 6
Unpacking and Inspection................................................................................................................................ 6
Preparation ...................................................................................................................................................... 6
Mounting the Energy Storage & Inverter/Charger ........................................................................................... 6
Grounding ........................................................................................................................................................ 7
Mounting Unit ................................................................................................................................................... 8
Battery Connection .......................................................................................................................................... 9
AC Output Connection ................................................................................................................................... 10
PV Connection ............................................................................................................................................... 11
Final Assembly ............................................................................................................................................... 12
Communication Connection ........................................................................................................................... 13
OPERATION ..................................................................................................................................................... 14
Power ON/OFF ............................................................................................................................................... 14
Operation and Display Panel .......................................................................................................................... 14
LCD Display Icons ......................................................................................................................................... 15
LCD Setting .................................................................................................................................................... 17
Display Setting ............................................................................................................................................... 19
Operating Mode Description .......................................................................................................................... 22
Fault Reference Code .................................................................................................................................... 23
Warning Indicator ........................................................................................................................................... 23
SPECIFICATIONS ........................................................................................................................................... 23
Table 1 Line Mode Specifications .................................................................................................................... 24
Table 2 Inverter Mode Specifications ............................................................................................................. 24
Table 3 Charge Mode Specifications ............................................................................................................... 24
Table 4 General Specifications ........................................................................................................................ 25
Table 5 Energy Storage Specifications ........................................................................................................... 25
TROUBLESHOOTING ...................................................................................................................................... 26
2
PURPOSE & SCOPE
This manual describes the assembly, installation, operation and troubleshooting of this system. Please
read this manual carefully before installations and operations. Keep this manual for future reference.
This manual provides safety and installation guidelines as well as information on tools and wiring.
SAFETY INSTRUCTIONS
WARNING: This part contains important safety and operating instructions. Read and
keep this manual for future reference.
1. Before using the system, read all instructions and cautionary markings on the inverter/charger, the
batteries and all appropriate sections of this manual.
2. Caution --To reduce risk of injury, charge it with only Li-ion type rechargeable batteries. It might
burst or result in physical injury and damage if you charge it with other types of batteries.
3. Do not disassemble the system and its component. Take it to a qualified service center when service
or repair is required. Incorrect re-assembly may result in a risk of electric shock or fire.
4. To reduce risk of electric shock, disconnect all wirings before attempting any maintenance or clean-
ing. Turning off the system will not reduce this risk.
5. CAUTION – Only qualified personnel can install Inverter/Charger with battery. (LICENCED
ELECTRICIAN)
6. NEVER charge a frozen battery.
7. For optimum operation of this system, please follow required spec to select appropriate cable size.
It’s very important to correctly operate this Unit.
8. Be very cautious when working with metal tools on or around batteries. A potential risk exists of
drop a tool to spark or short circuit batteries or other electrical parts and could cause an explosion.
9. Please strictly follow installation procedure when you want to disconnect AC or DC terminals. Please
refer to INSTALLATION section of this manual for the details.
10. Inverter/Charger Fuses are provided as over-current protection for the battery supply.
11. GROUNDING INSTRUCTIONS -This Inverter/Charger and Energy Storage should be connected to a
permanently grounded wiring system. Be sure to comply with local requirements and regulation to
install these units.
12. NEVER cause AC output and DC input short circuited. Do NOT connect to the mains when DC input
short circuits.
13. Warning!! Only qualified service persons are able to service this system. If errors still persist after
following troubleshooting table, please send these units back to local dealer or service center for
maintenance.
14. Warning!! Normally grounded conductors may be ungrounded and energized when a ground fault is
indicated.
15. The DC and AC circuits are isolated from the enclosure and that system grounding. If it's required to
be compliance with Section 250 of the National Electrical Code, ANSI/NFPA 70, it's is the responsibil-
ity of the installer.
16. The Photovoltaic System Grounding shall be installed per the requirements of Sections 690.41
through 690.47 of the National Electrical Code, ANSI/NFPA 70 and is the responsibility of the in-
staller.
17. CAUTION- Authorized service personnel should reduce the risk of electrical shock by disconnecting
AC, DC and battery power before attempting any maintenance or cleaning or working on any circuits
3
connected to the system. Turning off controls will not reduce this risk. Internal capacitors can remain
charged for 5 minutes after disconnecting all sources of power.
18. CAUTION- To avoid a risk of fire and electric shock, make sure that existing wiring is in good condi-
tion and that the wire is not undersized. Do not operate these units with damaged or substandard
wiring.
19. CAUTION- To reduce risk of fire hazard, do not cover or obstruct the cooling fan.
20. CAUTION- Do not operate these units if it has received a sharp blow, been dropped, or otherwise
damaged in any way. If these units have damaged, called for an RMA (Return Material Authoriza-
tion).
21. CAUTION- Do not connect other brands or any type of Inverter/Charger with Energy Storage (BMT-
ES5000R), because it has been fine-tuned through communication port for both Inverter/Charger
(BMT-CU2000R) and Energy Storage (BMT-ES5000R); other brands of inverter/Charger cannot han-
dle BMT-ES5000R over charging, under discharging, cell balancing and over temperature situation
which will cause it to burst or result in damage to the Energy Storage (BMT-ES5000R).
4
OUR SYSTEM
The FLEX Energy Storage SystemTM for residential use can provide power to connected loads by utilizing
PV power and battery power.
Features
Inverter and built-in MPPT solar charge controller
Applicable Battery by using LiFePO4 Rechargeable Battery
Overload/ Overcharge/ Over temperature/ short circuit protection
Embedded Battery Management System which offers active cell balance function
System Overview This Energy Storage System provides power to connected loads by utilizing PV power. When PV energy
output is good, it will power connected loads from solar electric (photovoltaic.) According to different
power situations, this Residential Energy Storage System is designed to generate continuous power from
PV solar modules (solar panels) and battery. When MPP input voltage of PV modules is within acceptable
range, this system is able to generate power to Load and charge battery. This Energy Storage System is
only compatible with PV module types of single crystalline and poly crystalline. Do not connect any PV ar-
ray types other than these two types of PV modules to the Storage. See following diagram of a typical
solar system with the Energy Storage System.
The Subsystems
5
Energy Storage (BMT-ES5000R) The Energy Storage is comprised of 32 pcs of LFP type cells in 16s/2p structure as well as embedded with Battery Management System (BMS) to monitor and provide active balance for the batteries.
1
6
5 4
3
2
Functions & Outlets
1. LED Indicator for BMS board
2. Cell Monitor communication port
3. DC Circuit Breaker (80A)
4. RS-485 to RJ45 port for connecting the RS-485 port on Inverter/Charger
5. Anderson Connector to Connect the Battery input/output port on Inverter/Charger
6. Grounding wire connection
6
Inverter/Charger (BMT-CU2000R)
The Inverter/Charger is designed to manage Energy Storage for PV generation and transfer electricity to the
loads. Essentially the system is used for backup purposes.
Functions & Outlets
1. LCD display
2. Status indicator
3. Charging indicator
4. Fault indicator
5. Function buttons
6. Power on/off switch
7. ----------
8. AC output
9. PV input
10. Battery input
11. Circuit breaker
12. RS232 communication port
13. RS-485 communication port
14. Grounding
7
INSTALLATION
Unpacking and Inspection
Before installation, please inspect the subsystem unit. Be sure that nothing inside the package is damaged. You should have received the following items inside of packages:
Energy Storage X 1
Inverter/Charger x1
Power cable X 1
User manual X 1
Communication cable x2(RS232 cable and RJ45 cable)
Preparation
Before connecting all wiring, please take off bottom cover by removing two screws as shown below.
Mounting the Energy Storage &Inverter/Charger
Selecting Mounting Location
Consider the following points before selecting where to install:
Do not mount the Inverter/Charger & Energy Storage on flammable construction materials.
Mount on a solid surface
This Inverter/Charger can make noises during operation which may be perceived as a
nuisance in a living area.
Install this Inverter/Charger at eye level in order to allow the LCD display to be read at all
times.
For proper air circulation to dissipate heat, allow a clearance of approx. 20cm to the side and
approx. 50 cm above and below the Inverter/Charger.
Install this Energy Storage, the distance from bottom of Energy Storage and the floor is bet-
ter not higher than 60cm. Dusty conditions on the unit may impair the performance of this Inverter/Charger &Energy Storage. The ambient temperature should be between 0˚C and 45˚C for Energy Storage and relative
humidity should be between 5% and 85% to ensure optimal operation.
The recommended installation position is to be adhered to vertical.
For proper operation of the Inverter/Charger & Energy Storage, please use appropriate
cables for power connection.
Select an appropriate mounting location. Install the Inverter/Charger & Energy Storage in a
protected area that is dry, free of excessive dust and has adequate air flow.
8
Installation position shall not prevent access to the disconnection means.
The Inverter/Charger & Energy Storage is designed for indoor applications only.
Regularly clean the fan filter on the Inverter/Charger.
Be sure to keep other objects and surfaces as shown below diagram to guarantee sufficient
heat dissipation and to have enough space for removing wires
Please use M6 screw with 2~3N.m torque to fasten the Green Wire on the Grounding icon “G” of Energy
Storage case.
Mounting of unit should be accomplished by
a licensed professional in compliance with the national Electric code as well as local
regulations enforced by the Authority Having Jurisdiction.
Grounding CAUTION: For safety, it’s requested to connect the device to the ground first. Proper grounding can not only remove
the unwanted “electrical noise” but can even make surge protection device work better. Please refer to the typical requirement in the table below as required grounding cables.
Suggested cable requirement for grounding
Gauge Torque Value Color
8 AWG for
Inverter/Charger 2.52 Nm
Green
8 AWG for Energy Storage
2~3 Nm Green
Please refer to the diagram below to complete the grounding:
9
Mounting Unit
Install the Inverter/Charger by screwing three screws and 6 screws for Energy Storage on the wall,
then connect to Energy Storage by Power cable from Inverter/Charger of Battery +/- Pole and RJ45 signal
wire as shown below, please don’t make the wrong polarity on Inverter/Charger.
Installation to the wall should be implemented with the proper screws. After that, the device
should be bolted on securely.
The Energy Storage and Inverter/Charger only can be used in a CLOSED ELECTRICAL OPERATING
AREA. Only service person can enter into this area.
Energy Storage
1. Drill six holes in the mounting location to install suitable expansion anchor bolts at first.
2. Stand up the module which can be uplift by handles (welding on the wall hanging plate),
then use a jack or strong platform to support the module in position to tighten the screws(M10 X 6).
The reference tightening torque is 35 N.m.
3. Check if the Energy Storage is firmly secured.
4. Connect the Inverter/Charger Battery input port by using accessory of Anderson Connector with wire.
5. Connect the Inverter/ChargerRS-485 Communication port to Energy Storage RS-485 port with RJ45 wire.
6. Use M6 screws with 2~3 N.m torque to fasten the Green Wire (8 AWG) on the Grounding icon “G” of Energy
Storage case.
WARNING!! Remember that the Energy Storage and Inverter/Charger is
heavy! Please be carefully when lifting out from the package.
CAUTION- Energy Storage (BMT-ES5000R) can only be connected to BMT-
CU2000R Inverter/Charger. Do not connect other brands or any other type of
Inverter/Charger with Energy Storage (BMT-ES5000R) to avoid burst and bat-
tery damage.
WARNING!! FIRE HAZARD.
Mounting of unit should be accomplished by a licensed professional in compli-
ance with the National Electric Code as well as local regulations enforced by
the Authority Having Jurisdiction
10
Battery Connection
CAUTION: For safety operation and regulation compliance, it’s requested to install a separate DC over-current
protector or disconnect device between Energy Storage and Inverter/Charger. It may not be requested to have
a disconnect device in some applications, however, it’s still requested to have over-current protection installed.
Please refer to typical amperage in below table as required fuse or breaker size.
WARNING! All wiring must be performed by a qualified personnel.
WARNING! It's very important for system safety and efficient operation to use appropriate cable for battery connection. To reduce risk of injury, please use the proper recommended cable and terminal size as below.
Recommended battery cable and terminal size:
Model Typical
Amperage
Battery
Capacity
Wire Size Ring Terminal Torque
Value Cable
mm2
Dimensions
D(mm) L(mm)
BMT-CU2000R 33A 100AH 1*8~10AWG 5~8 6.4 22.5 2~ 3Nm
Please follow the steps below to implement the battery connection:
1. Assemble battery ring terminal according to the recommended battery cable and terminal size.
2. Connect all battery packs according to the requirement of the inverter/charger. It’s suggested to connect at
least 100Ah capacity battery. This inverter/charger is intended to charge 48VDC battery of Lithium-ion.
3. Insert the ring terminal of battery cable flatly into battery connector of inverter/charger and make sure the bolts
are tightened with torque of 2-3 Nm. Make sure polarities at both the battery and the inverter/charger are
correctly connected and ring terminals are tightly screwed to the battery terminals.
WARNING: Shock Hazard
Installation must be performed with care due to high battery voltage in series.
CAUTION!! Do not place anything between the flat part of the Inverter/Charger terminal and the
ring terminal. Otherwise, overheating may occur.
CAUTION!! Do not apply anti-oxidant substance on the terminals before terminals are connected
tightly.
CAUTION!! Before making the final DC connection or closing DC breaker/disconnector, be sure
positive (+) must be connected to positive (+) and negative (-) must be connected to negative (-).
Ring terminal:
11
AC Output Connection CAUTION!! To reduce the risk of fire, connect only to an AC line circuit provided with 30 amperes maximum
branch-circuit miss-connect protection in accordance with the National Electrical Code, ANSI/NFPA 70 by the in-
staller.
CAUTION!! There are two terminal blocks with “IN” and “OUT” markings. Please do NOT miss-connect input
and output connectors.
WARNING! All wiring must be performed by a qualified personnel.
WARNING! It's very important for system safety and efficient operation to use appropriate cable for AC input connection. To reduce risk of injury, please use the proper recommended cable size as below.
Suggested cable requirement for AC wires
Model Gauge Torque Value
2KVA 120VAC 12AWG 2.07~ 2.3Nm
Please follow below steps to implement AC output connection:
1. Before making AC output connection, be sure to open DC protector or disconnector first.
2. Remove insulation sleeve 10mm for six conductors. And shorten phase L and neutral conductor N3 mm.
3. Then, insert AC output wires according to polarities indicated on terminal block and tighten terminal
screws. Be sure to connect PE protective conductor ) first.
→Ground (yellow-
green) L→LINE (brown or
black) N→Neutral (blue)
4. Make sure the wires are securely connected.
5.
CAUTION: Important
Be sure to connect AC wires with correct polarity. If L and N wires are connected reversely, it may cause
utility short-circuited when these inverters are worked in parallel operation.
12
PV Connection
CAUTION: Before connecting to PV modules, please install separately a DC circuit breaker between inverter
and PV modules.
WARNING! All wiring must be performed by a qualified personnel.
WARNING! It's very important for system safety and efficient operation to use appropriate cable for PV module connection. To reduce risk of injury, please use the recommended cable size as below.
Typical Amperage Cable Size Torque
45A 8 AWG 3.6 Nm
PV Module Selection:
When selecting proper PV modules, please be sure to consider the parameters below: 1. Open circuit Voltage (Voc) of PV modules can’t exceed the maximum voltage of the PV array open circuit of
the inverter. 2. Open circuit Voltage (Voc) of PV modules should be higher than the minimum voltage of the battery.
Please follow the steps below to implement PV module connection:
1. Remove insulation sleeve 10 mm from positive and negative conductors. 2. Check the correct polarity of connected cable from PV modules and PV in-
put connectors. Then, connect positive pole (+) of connection cable to positive pole (+) of PV input connector. Connect negative pole (-) of con-
nection cable to negative pole (-) of PV input connector.
3. Make sure the wires are securely connected.
Solar Charging Mode
Max. PV Array Open Circuit Voltage 145Vdc
PV Array MPPT Voltage Range 60~115Vdc
Min. battery voltage for PV charge 34Vdc
CAUTION: Appliances such as air conditioner are required at least 2~3 minutes to restart because it’s required
to have enough time to balance refrigerant gas inside of circuits. If a power shortage occurs and recovers in a
short time, it will cause damage to your connected appliances. To prevent this kind of damage, please check
manufacturer of air conditioner if it’s equipped with time-delay function before installation. Otherwise, this in-
verter/charger will trig overload fault and cut off output to protect your appliance but sometimes it still causes
internal damage to the air conditioner.
CAUTION: Important Be sure that the AC output / neutral is not bonded to ground inside of the inverter.
13
Final Assembly
After connecting all wirings, please put the bottom cover back by fixing two screws as shown below.
14
Communication Connection
There is one RS485 port which can communicate with external battery management system. Please be sure to use supplied RS485 cable to connect the inverter and external battery management system before
startup the unit.
15
OPERATION Power ON/OFF
Once the unit has been properly installed and the batteries are connected, simply press On/Off switch (located on the right corner of the rear panel) to turn on the unit.
Operation and Display Panel The operation and display panel, as shown in the chart below, are on the front panel of the inverter. It includes three indicators, four function keys and an LCD display, indicating the operating status and
input/output power information.
LED Indicator
LED Indicator Messages
Green
Solid On Output is powered by utility inLine mode.
Flashing Output is powered by battery or PV inbattery
mode.
Green Solid On Battery is fully charged.
Flashing Battery is charging.
Red Solid On Fault occurs in the inverter.
Flashing Warning occurs in the inverter.
LCD display
LED indicators
Function keys
16
Function Keys
Function Key Description
ESC To exit setting mode
UP To go to previous selection
DOWN To go to next selection
ENTER To confirm the selection in setting mode or enter setting mode
LCD Display Icons
Icon Function description
Input Source Information
Indicates the PV input
Indicates input voltage, input frequency, PV voltage, battery voltage and charger cur-
rent.
Configuration Program and Fault Information
Indicates the setting programs.
Indicates the warning and fault codes.
Warning: flashing with warning code.
Fault: lighting with fault code
Output Information
Indicate output voltage, output frequency, load percent, load in VA, load in Watt and
discharging current.
Battery Information
Indicates battery level by 0-24%, 25-49%, 50-74% and 75-100% in battery mode and charging status in line mode.
In charging mode, it will present battery charging status.
Status Battery voltage LCD Display
Constant Cur-rent mode /
Constant Volt-
age mode
Battery level < 25% 4 bars will flash in turns.
25% ≤ battery level < 50% Bottom bar will be on and the other three bars will flash in turns.
50% ≤ battery level < 75% Bottom two bars will be on and the other two bars will flash in turns.
Battery level ≥ 75% Bottom three bars will be on and the top bar will
flash.
In floating mode, batteries are fully charged. 4 bars will be on.
17
In battery mode, it will present battery capacity.
Battery Voltage LCD Display
battery level < 25%
25%≤ battery level < 50%
50%≤ battery level < 75%
battery level ≥ 75%
Load Information
Indicates overload.
Indicates the load level by 0-24%, 25-49%, 50-74% and 75-100%.
0%~24% 25%~49% 50%~74% 75%~100%
Mode Operation Information
Indicates unit connects to the mains.
Indicates unit connects to the PV panel.
Indicates load is supplied by utility power.
Indicates the DC/AC inverter circuit is working.
Mute Operation
Indicates the alarm is disabled.
18
LCD Setting
After pressing and holding the ENTER button for 3 seconds, the unit will enter setting mode. Press “UP” or
“DOWN” button to select setting programs. And then, press “ENTER” button to confirm the selection or ESC button to exit.
Setting Programs:
Program Description Selectable option
00 Exit setting mode
Escape
01
Output source priority:
To configure load power source priority
Solar first
Solar energy provides power to the
loads as first priority.
If solar energy is not sufficient to power all connected loads, battery
energy will supply power the loads at the same time.
Utility provides power to the loads
only when any one condition hap-pens:
- Solar energy is not available - Battery voltage drops to low-level
warning voltage.
Utility first (default)
Utility will provide power to the loads
as first priority. Solar and battery energy will provide
power to the loads only when utility
power is not available.
SBU priority
Solar energy provides power to the
loads as first priority. If solar energy is not sufficient to
power all connected loads, battery energy will supply power to the loads
at the same time.
Utility provides power to the loads only when battery voltage drops to
low-level warning voltage.
02 Power saving mode ena-
ble/disable
Saving mode disa-
ble(default)
If disabled, no matter connected load
is low or high, the on/off status of in-
verter output will not be affected.
Saving mode enable
If enabled, the output of inverter will
be off when connected load is pretty low or not detected.
03 Auto restart when overload occurs
Restart disable(de-
fault)
Restart enable
04 Auto restart when over
temperature occurs
Restart disable(de-fault)
Restart enable
05 Output voltage
110V
120V (default)
06 Output frequency
50Hz
60Hz(default)
19
07 Maximum utility charging
current
5A
10A(default)
08
Setting voltage level back
to battery mode when se-lecting “SBU priority” or
“Solar first” in program 01.
Default setting: 90%
Setting range is from 10% to 100% Increment of each click
is 10%.
09
Charger source priority: To configure charger
source priority
MUST SET TO SOLAR FIRST
If this inverter/charger is working in Line, Standby or Fault mode, charger source can be programmed as below:
Solar first
Solar energy will charge battery as first priority.
Utility will charge battery only when
solar energy is not available.
Utility first (Default)
Utility will charge battery as first pri-
ority.
Solar energy will charge battery only when utility power is not available.
Only Solar
Solar energy will be the only charger
source no matter utility is available or not.
If this inverter/charger is working in Battery mode or Power
saving mode, only solar energy can charge battery. Solar en-ergy will charge battery if it's available and sufficient.
10 Alarm control
Alarm on(default)
Alarm off
11 Auto return to default dis-play screen
Return to default dis-
play screen (default)
If selected, no matter how users
switch display screen, it will automat-ically return to default display screen
(Input voltage /output voltage) after
no button is pressed for 1 minute.
Stay at latest screen
If selected, the display screen will
stay at latest screen user finally switches.
12 Backlight control
Back light on(default)
Backlight off
13 Beeps while primary source
is interrupted
Alarm on (default)
Alarm off
14
Overload bypass:
When enabled, the unit will
transfer to line mode if overload occurs in battery
mode.
Bypass disable(De-
fault)
Bypass enable
15 Record Fault code
Record enable
Record disable (default)
Display Setting
20
The LCD display information will be switched in turns by pressing “UP” or “DOWN” key. The selectable in-
formation is switched as below order: input voltage, input frequency, PV voltage, MPPT charging current,
MPPT charging power, battery voltage, output voltage, output frequency, load percentage, load in VA, load in Watt, DC discharging current, main CPU Version and second CPU Version.
Selectable information LCD display
Input voltage/Output voltage (Default Display Screen)
Input Voltage=120V, output voltage=120V
Input frequency
Input frequency=60Hz
PV voltage
PV voltage=60V
MPPT Charging current
Current≧10A
Current<10A
MPPT Charging power MPPT charging power=500W
Battery voltage/DC discharging current
Battery voltage=50.5V, discharging current=1A
21
Output frequency
Output frequency=60Hz
Load percentage
Load percent=70%
Load in VA
When connected load is lower than 1kVA, load in VA will present xxxVA like below chart.
When load is larger than 1kVA (≧1KVA), load in
VA will present x.xkVA like below chart.
Load in Watt
When load is lower than 1kW, load in W will pre-
sent xxxW like below chart.
When load is larger than 1kW (≧1KW), load in W
will present x.xkW like below chart.
Main CPU version checking
Main CPU version 00014.04
22
Secondary CPU version checking
Secondary CPU version 00003.03
23
Operating Mode Description Operation mode Description LCD display
Standby mode/ Power sav-ing mode Note: *Standby mode: The inverter is not turned on yet but at this time, the inverter can charge battery without AC output. *Power saving mode: If ena-bled, the output of inverter will be off when connected load is pretty low or not de-tected.
No output is supplied by
the unit but it still can
charge batteries.
Charging by utility.
Charging by PV energy.
No charging.
Fault mode Note: *Fault mode: Errors are caused by inside circuit error or external reasons such as over temperature, output short circuited and so on.
PV energy and utility can charge batteries.
Charging by utility.
Charging by PV energy.
No charging.
Line Mode
The unit will provide output
power from the mains. It
will also charge the battery at line mode.
Charging by PV energy
Charging by utility.
Battery Mode The unit will provide output power from battery and PV
power.
Power from battery and PV energy.
Power from battery only.
24
Fault Reference Code
Fault Code Fault Event Icon on
01 Fan is locked when inverter is off.
02 Over temperature
03 Battery voltage is too high
04 Battery voltage is too low
05 Output short circuited or over temperature is de-tected by internal converter components.
06 Output voltage is abnormal.
07 Overload timeout
08 Bus voltage is too high
09 Bus soft start failed
11 Main relay failed
19 Over temperature on battery
20 Communication lost with battery management
system
Over Discharged on the Battery
Warning Indicator
Warning Code
Warning Event Audible Alarm Icon flashing
01 Fan is locked when in-
verter is on.
Beep three times every sec-
ond
03 Battery is over-charged Beep once every second
04 Low battery Beep once every second
07 Overload Beep once every 0.5 second
10 Output power derating Beep twice every 3 seconds
12 Solar charger stops due
to low battery.
13 Solar charger stops due to high PV voltage.
14 Solar charger stops due to overload.
19 Over temperature on
battery
25
SPECIFICATIONS
Table 1: Inverter Mode Specifications
MODEL BMT-CU2000R
Nominal Input Voltage 48Vdc
Max. Input Current 33A
Max. Input Branch Circuit over current protection 50 A dc
Min. Interrupting Rating of DC over current protection 10 KA
Rated Output Power 2000VA/1600W
Output Power Factor 0.8
Output Phase Configuration Single Phase
Output Voltage Waveform Pure Sine Wave
Nominal Output Voltage 120Vac 1Φ
Output Frequency 50/60Hz
Output Current 16.7A ac
Max. Output Branch Circuit over current protection 30 A ac
Table 2: Solar Charger Mode Specifications
System Voltage 145Vdc
Max. Solar Voltage (Open circuit voltage) 145Vdc
Range of Input Voltage 60 ~115Vdc
Max. Input Branch Circuit over current protection 80 A dc
Min. Interrupting Rating of DC over current protection 10 KA
DC Charging Voltage 48Vdc
Max. Input Current 45 A
Max. Input Short Circuit Current 50A
26
Table 3: General Specifications
MODEL BMT-CU2000R
Safety Certification UL1741
Operating Temperature Range 0°C to 55°C
Storage temperature -15°C~ 60°C
Dimension (D*W*H), mm 500 x 295 x 140
Table 4: Energy Storage Specification
MODEL BMT-ES5000R
Safety Certification UL1973
Cell Type LiFePO4 / Lithium-ion Battery (UL certified)
Nominal Voltage 51.2Vdc
Maximum Capacity 100Ah
Total Battery Power Capacity 5120Wh
Over voltage Detecting point 54.25 Vdc
Under Voltage Detecting Point 47.25 Vdc
Max. Charging Current 30A
Max. Discharging Current 40A
Battery Serial/Parallel number 16S/2P
Over Temperature Detecting Point 70°C
Charging Temperature 0~+45°C
Discharging Temperature -10~+50°C
Dimension (D*W*H),mm 696X340X210
Net Weight, kg 70
27
TROUBLESHOOTING
Problem LCD/LED/Buzzer Explanation / Possible cause What todo
Unit shuts down automati-
cally during startup process.
LCD/LEDs and buzzer will be active
for 3 seconds and then complete off.
The battery voltage is too
low (<1.91V/Cell)
1. Re-charge battery.
2. Replace battery.
No response af-
ter power on.
No indication.
1. The battery voltage is far too low. (<1.4V/Cell)
2. Battery polarity is con-nected reversed.
1. Check if batteries and the wiring are connected-
well. 2. Re-charge battery.
3. Replacebattery.
Mains exist but the unit works in
battery mode.
Input voltage is dis-played as 0 on the
LCD and green LED
is flashing.
Input protector is tripped Check if AC breaker is tripped and AC wiring is con-
nected well.
Green LED is flash-ing.
Insufficient quality of AC power. (Shore or Generator)
1. Check if AC wires are
too thin and/or too long. 2. Check if generator (if ap-
plied) is working well or if input voltage range setting is correct. (UPSAppliance)
Green LED is flashing. Set “Solar First” as the priority of output source.
Change output source prior-ity to Utility first.
When the unit is turned on, internal
relay is switched on and off repeat-
edly.
LCD display and
LEDs are flashing
Battery is disconnected
Check if battery power
cable and RJ45 wire are connected well.
Buzzer beeps continuously
and red LED
ison.
Fault code07
Overload error. The inverter is overload 110% and time is up.
Reduce the connected load by switching off some equip-
ment.
Fault code05
Output short circuited.
Check if wiring is con-nected well and remove abnormal load.
Temperature of internal con-verter component is over 120°C.
Check whether the air flow of the unit is blocked or
whether the ambient tem-
perature is too high. Fault code02 Internal temperature of in-verter component is over
100°C.
Fault code03
Battery is over-charged. Return to repair center.
The battery voltage is too high.
Check if spec and quantity of batteries are meet re-quirements.
Fault code01 Fan fault Replace the fan.
Fault code06/58
Output abnormal (Inverter volt-
age below than 190Vac or is higher than 260Vac)
1. Reduce the con-
nected load. 2. Return to repair center
Fault code 08/09/53/5
7
Internal components failed. Return to repair center.
Fault code51 Over current or surge.
Restart the unit, if the error
Fault code52 Bus voltage is too low.
28
Fault code55 Output voltage is unbalanced. happens again, please re-
turn to repair center.
Fault code56 Battery is not connected well or fuse is burnt.
If the battery is connected
well, please return to re-pair center.
Fault code20 1. Communication lost be-
tween Inverter & Energy Storage
2. Over discharged on the battery.
1. Check if RJ45 wire are connected well and En-
ergy Storage LED Indi-
cator is Flickering; 2. Turn off the load; turn
off the Inverter switch then turn it on and
start to Charge the battery.
Connected Battery no power
No indication 1. Check if tightly connected
on power terminals
2. Check if LED Indicator lit
3. No Power as it is
1. Re-plug the connectors
2. Require the service en-gineer
DC breaker on En-ergy Storage is off
No indication Check if overload or short circuit incurred
Require the service engineer
Energy Storage can-not be charge/dis-
charged
No indication 1. Check if power is on
2. Check if protection is not re-
leased. 3. Check if Inverter/Charger is well
functional
1. Re-plug power switch
2. Require the service engi-
neer 3. Require the service engi-
neer
Enclosure over-heated
Fault code02 1. Stop charging & discharging
2. Check if ambient temperature is
appropriate for the system 3. Check if the battery in well con-
nected.
1. Need to stop it immediately
2. Move to lower ambient temperature location
3. Require the service engi-neer