MPPT 104714 User manual

User Manual
MPPT Solar Charge and Discharge Controller
Mode：104714

Dear User:
Thank you very much for choosing our product!
Safety Instructions
1) The applicable voltage of the controller exceeds the human safety voltage. Please read the user
manual in detail and complete the training for safe operation before operation.
2) No parts inside the controller need to be maintained or repaired. The user should not disassemble
and repair the controller by themselves.
3) Please install the controller indoors and prevent water from entering the controller.
4) Please install the controller in a well ventilated area, as the temperature of the heat sink will be very
high during operation.
5) It is recommended to install a suitable fuse or circuit breaker on the exterior of the controller
6) Be sure to disconnect the solar panel battery and the fuse or circuit breaker near the battery terminal
before installing and adjusting the wiring of the controller.
7) After installation, check that all wiring connections are tight to avoid the risk of heat build-up due to
poor contact.
WARNING: Indicates that this operation is dangerous and that safety precautions
must be taken prior to the operation.
Caution: Indicates that this operation is destructive.
!
Table of Contents
01 02
16、System Wiring Diagram
03
03
04
04
12
12
04
08
07
06
08
07
12
1、 Product Introduction
1.1.Overview
1.2.Features
1.3.Appearance and Interfaces
2、 MPPT Technique Introduction
3、 Technical Parameters
4.1Lead-acid battery charge
4.2Lithium battery charge
4.3Current-limiting charge
4、 Battery Charge
6、 Battery Temperature Sampling
7、 RS485 Communication Interface
8、 Indicators
09
5、 System Settings
09
5.1Lead-acid battery application
10
10
10
10
5.2Lithium battery application
5.3System reset
5.4Restore to default settings
5.5Menu auto page turning, backlight settings
10
5.6Parallel charge settings
11
5.7Load output
12
8.1Charge indicator
13
8.2Battery indicator
13
13
8.3Load indicator
8.4Fault indicator
13
9、 Menu Display
13
9.1Menu diagram
14
9.2Menu display
14
10、Error Codes
15
11、Common Troubles and Handling Methods
15
12、Product Installation
16
13、Protections
16
14、System Maintenance
17
18
15、Product Dimensions

1. Product Introduction
03 04
1.1 Overview
The controller employs the industry-leading PowerCatcher maximum power point tracking technique
to track the maximum energy of the solar panel. The MPPT technique enables the controller to quickly and
accurately track the maximum power point of the solar panel in any environment and obtain the maximum
energy of the solar panel in real time. This can significantly improve the energy utilization of the solar
system. It is widely used in off-grid PV systems to manage the work of solar panels and batteries, and
serves as the core control component of off-grid PV systems. The controller comes with complete
electronic fault detection and protection functions, which can minimize the damage of product
components due to installation errors and system failures.
1.3 Appearance and Interfaces
1.2 Features
With the PowerCatcher MPPT technique.
It enables full power charging and discharging.
Parallel charging is supported.
Active output voltage stabilization ensures good lithium battery activation.
Temperature compensation is available.
Several battery types can be preset.
LCD is equipped for real-time data interaction.
Complete protections are provided, including over-voltage, over-current, overload, over-temperature,
short-circuit and reverse polarity protections.
Natural heat dissipation and heat dissipation by fan are optional.
It supports Modbus protocol.
Figure 1-1 Controller Appearance and Interfaces
Name
Solar panel anode interface
Solar panel cathode interface
Battery anode interface
Battery cathode interface
Load anode interface
Load cathode interface
Temperature sensor interface
Name
RS485 isolated communication interface
Charge indicator
Battery indicator
Load indicator
Fault indicator
LCD screen
Buttons
No.
①
②
③
④
⑤
⑥
⑦
No.
⑧
⑨
⑩
⑪
⑫
⑬
⑭
Maximum Power Point Tracking (referred to as MPPT) system is an advanced charging technique that
enables solar panel to deliver more power by regulating the operating state of the electrical modules. Due
to the nonlinearity of solar array, there is a maximum energy output point (maximum power point) of the
array on its curve. Traditional controllers (switch mode charging technology and PWM charging
technology) are unable to maintain charging the battery at this point, and therefore unable to obtain the
maximum energy of the panels. But, the solar controllers with MPPT control technique can always track the
maximum power point of the array to obtain the maximum energy to charge the battery. Take a 12V
system as an example. The peak voltage (Vpp) of the solar panel is around 17V but the battery voltage is
around 12V. So, for general charge controllers, the solar panel outputs a voltage of around 12V during
charging and does not output its maximum power. MPPT controller can overcome this problem. It
constantly adjusts the input voltage and current of the solar panel to achieve the maximum input power.
Compared with traditional PWM controller, the MPPT controller can maximize the power of the solar panel,
so that it can provide a larger charging current. Generally, the MPPT controller can increase the energy
utilization by 15% to 20% compared with the PWM controller.
2. MPPT Technique Introduction
⑨
⑩
⑪
⑫
⑬⑭
⑧
⑦ ① ② ③ ④ ⑥⑤

05 06
As light becomes less,
current decreases
As light becomes less, open circuit voltage drops
U(V)
I(A)
20℃
50℃
70℃
60℃
40 ℃
30℃
I (A)
U( V)
As temperature falls,
current does not change,
power increases
Relationship between the solar panel
output characteristics and the light
The maximum power point often changes due to different ambient temperature and lighting
conditions. Our MPPT controller can adjust the parameters from time to time according to different
conditions, so that the system is always near the maximum power point. The entire process is completely
automatic and does not require any adjustments by the user.
PWM
charge
U(V)
I(A)P(W)
VP Cu rve
VI Curve
94. 5
81. 0
67. 5
54. 0
27. 0
40. 5
13. 5
0. 0
19. 616. 814. 011. 28. 45. 62. 80. 0
0. 5
1. 0
1. 5
2. 0
2. 5
3. 0
3. 5
4. 0
4. 5
5. 0
MPPT Point
3. Technical Parameters
ValuesParameter name
12V/24V/36V/48V
0.5W
9V~64V
150V
(Battery voltage+2)~120V
60A
40A
800W/12V; 1600W/24V; 2400W/36V; 3200W/48V
≤98%
＞99%
5V*n
6V*n
Day to night: 5min (default) Night to day: 1min
Isolated RS485 :baud rate 9600, data bit8, stop bit1,
no check bit; default address 1
Natural heat dissipation + heat dissipation by fan
By RS485 communication cables,
multiple controllers can work in parallel to control charging
For battery temperature protection and
lead-acid battery temperature compensation
Battery over-charge protection, battery over-discharge protection,
battery reverse polarity protection, PV reverse polarity
protection, nighttime reverse charge protection, internal
over-temperature protection, charge over-current protection,
load over-current protection, load short-circuit protection,
fan fault protection, etc.
-10℃～+65℃
≤ 3000m
IP32
3.6kg
275*167*90mm
As temperature rises, open circuit voltage drops
Solar panel temperature
Relationship between the solar panel
output characteristics and the temperature
System voltage
No-load loss
Battery voltage
Maximum PV open circuit voltage
Maximum power point voltage range
Rated charge current
Rated load current
Solar panel power
Charge conversion efficiency
MPPT tracking efficiency
Light control ON voltage
Light control OFF voltage
Light control delay
Communication mode
Cooling mode
Parallel charging
Battery outside temperature sampling
Protections
Operating temperature
Altitude
IP rating
Weight
Dimensions

Battery parameters
Battery
type
Over voltage off voltage
Equalizing charge voltage
Boost charge voltage
Floating charge voltage
Boost recovery voltage
Over discharge recovery voltage
Under-voltage alarm voltage
Over discharge voltage
Over discharge cutoff voltage
Over discharge delay
Equalizing charge interval
Equalizing charge duration
Boost charge duration
Temperature compensation
coefficientmV/℃/2V
Sealed lead
acid battery
SLD
Gel lead
acid battery
GEL
Flooded lead
acid battery
FLD
User-defined
(User)
Lithium
battery
LI
3.1 Default parameters of battery
16.0V
14.6V
14.4V
13.8V
13.2V
12.6V
12.0V
11.1V
10.6V
6s
16.0V
--
14.2V
13.8V
13.2V
12.6V
12.0V
11.1V
10.6V
16.0V
14.8V
14.6V
13.8V
13.2V
12.6V
12.0V
11.1V
10.6V
16.0V
--
14.4V
--
13.2V
12.6V
12.0V
11.1V
10.6V
9~17V
9~17V
9~17V
9~17V
9~17V
9~17V
9~17V
9~17V
9~17V
1-30s
30 days -- 30 days -- 0～250d
0, turn off
equalizing charge
120min
120min
--
120min
120min
120min
--
--
10-600min
10-600min
-3 Lithium battery
has no temperature
compensation
-3 -3 --
The parameters of lead-acid batteries listed in the table are those of the 12V system at 25℃; for 24V/36V/48V
battery systems, they should be multiplied by 2/3/4.
4. Battery Charge
4.1 Lead-acid battery charge
MPPT charge
In the MPPT charge stage, the battery voltage has not yet reached the target constant value, and the
controller will perform MPPT charge, which enables the solar panel to charge the battery by its maximum
energy. When the battery voltage reaches the constant voltage value, it automatically exits MPPT charge
and enters constant voltage charge (equalizing/boost/floating charge).
As shown in Figure 8, the charging stages of lead-acid batteries include: MPPT charge, constant-voltage
charge (equalizing/boost/floating charge), current-limiting charge.
The constant voltage charging stage is divided into three stages: equalizing charge, boost charge and
floating charge.
Equalizing charge
Certain types of batteries benefit from regular equalizing charge. Equalizing charge primarily increases the
charge voltage of the battery to above the standard charge voltage, and equalizing charge vaporizes the
battery electrolyte to balance the battery voltage and complete the chemical reaction. The equalizing
charge and boost charge are not repeated in a full charge process to avoid too much gas evolution or
battery overheating.
Note:
1) Equalizing charge of FLD lead-acid battery can produce explosive gases, so the battery
compartment must be well ventilated.
2) Equalization can increase battery voltage but may compromise the level of sensitive DC loads.
It is therefore necessary to verify that the allowable input voltage for all loads in the system is greater
than the set value for battery equalizing charge.
3) Overcharging and too much gas evolution may damage the battery pole plate and cause the
active material on the battery pole plate to fall off. Excessive equalizing charge voltage or too long
equalizing charge may cause a damage to the battery. Please set the relevant parameters according to
the specifications of the battery used in the system.
!
Boost charge
The default duration of boost charge is 2 hours. When the duration reaches the set value, the system
will switch to floating charge.
Floating charge
Floating charge is the last stage of constant voltage charge of the lead-acid battery charge cycle,
where the controller keeps the charge voltage constant at the floating charge voltage. During this charge
stage, the battery is charged with a very low current to maintain full charge state of the battery. When the
battery voltage drops below the boost charge return voltage, the system will exit the floating charge stage
and re-enter the next charge cycle.
4.2 Lithium battery charge
As shown in Figure 9, the charging stages of lithium batteries include: MPPT charge, constant-voltage
charge (boost charge), current-limiting charge.
MPPT charge
In the MPPT charge stage, the battery voltage has not yet reached the target constant value, and the
controller will perform MPPT charge, which enables the solar panel to charge the battery by its
maximum energy. When the battery voltage reaches the constant value, constant voltage charge will be
carried out automatically.
Constant voltage charge (Boost charge)
Boost charge acts as the only constant voltage charge state for lithium battery charging. Only when the
battery voltage drops to the boost recovery charge setpoint, the system can exit the constant voltage
charge stage and re-enter the next charge cycle.
4.3 Current-limiting charge
Lead-acid, lithium and user-defined batteries all have current-limiting charge functionality throughout the
entire charge cycle.
4.3.1 Overpower current limiting
As long as the charge current exceeding the rated value is detected in any charge stage, the system
automatically enters current-limiting charge, and the charge current is limited to within the rated range.
4.3.2 Over temperature current limiting
As long as device over temperature is detected in any charge stage, the system automatically enters
current-limiting charge.
4.3.3 Fan failure current limiting
When detecting that the fan is blocked or not connected, the controller automatically limits the
charge current to 30A or below each, until the fault is restored.
07 08
Parameter
Set
6s 6s 6s

Figure 8 Lead-acid battery charge curve Figure 9 Lithium battery charge curve
5. System Settings
5.1 Lead-acid battery application
Method 1: Adopt the preset parameters on the controller, which cannot be changed.
Select “FLD/GEL/SLD” battery type on the controller, and the system voltage will be identified
automatically.
Method 2: User-defined (USE)
1) Press and hold the “ENTER” button for 2s. The battery icon and settings icon ( ) light up and the
current battery type icon in the lower right corner is blinking.
2) Press the "SELECT" button and select "USE" from the five battery types "USE/FLD/GEL/SLD/LI".
Press “ENTER” to switch between battery type, system voltage, equalizing charge voltage, boost charge
voltage, floating charge voltage, over-discharge return voltage, over-discharge voltage, etc. After selecting
a setting item, press “SELECT” to adjust the corresponding parameters.
3) Press and hold “ENTER” again for 2 seconds to save and exit.
Note:
Blinking of system voltages “12V/24V/36V/48V” means automatic identification, such as “12V”
blinking means that the system voltage set is 12V.
When it comes to system voltage change, a restart is required to take effect.。
!
5.2 Lithium battery application
Method 1: Select “LI” as the battery type, and the default is lithium iron phosphate battery.
Method 2: Either Lead-acid battery or Lithium battery may be used in USE mode, so the following
conditions must be met in order to use Lithium battery in USE mode: (operation is the same as in “5.1”)
1) Select the battery type “USE”;
2) Set a fixed system voltage and select one from “12V/24V/36V/48V”;
3) Set the equalizing charge voltage, floating charge voltage and boost charge voltage to the same value.
If two of the above conditions are met, the system will automatically identify the battery as lithium
batter y, and provide lithium batter y activation and lithium batter y charge control functions.
5.3 System reset
Press and hold the ENTER button for 10
seconds, and the LCD screen will display F01.
Release the button to restart the controller.
5.4 Restore to default settings
5.5 Menu auto page turning, backlight settings
1) Press and hold “SELECT” for 2 seconds to enter menu auto page turning;
2) Press and hold “SELECT” for 7 seconds. The backlight blinks twice before the system enters menu auto
page turning, and then the backlight is always on;
Menu auto page turning: each page stays for 3 seconds, and the setting will not be saved when power off.
When a button is pressed, the system immediately exits the auto page turning and the backlight is off.
5.6 Parallel charge settings
Parallel charge function refers to a unified charging of a battery pack by multiple controllers, each of which
has its own independent solar panel. The controllers are connected to each other by RS485 communication
cables, and the master synchronizes the charging state and stage, target constant voltage value and other
parameters to the slave. Parallel charge can break through the power limitation of single controller, and
multiple controllers in parallel can meet the need for greater charge power.
1) Simultaneously press and hold the “ENTER” and “SELECT” buttons on the LCD screen to bring up
the parallel menu.
At this point, the menu can only be viewed. Displaying P-XX means parallel mode, and C-XX means
communication mode, where XX is the device communication address;
2) Press and hold “ENTER” for 2 seconds to enter the settings mode, and the gear-shaped settings icon
blinks;
3) Press ENTER to cycle through parallel mode P-XX and communication mode C-XX;
4) Then, press “SELECT” to increment the address (Before the number flashing is off, press “ENTER” to
increment the address by 1; pressing “ENTER” after the number is off is to adjust the parallel and
communication mode);
5) After setting is complete, wait for5seconds without pressing any button to automatically save the setting
and go back to the main interface.
Notes:
P(Parallel) denotes setting theRS485 communication port for parallel charge purpose;
C(Communication) denotes setting theRS485 communication port for common communication purpose;
XX: denotes device address 00~99.
09 10
Charging current
Time
Fast charging
Bo os t
Bulk
Charging current
Ti me
Sustaining
charging Floating
charging
Equalizing charging voltage
Boost charging voltage
Floating charging voltage
Charging return voltage
Fast
charging
Sustaining
charging
Charging current
Charging current
Time
Ti me
Battery type System voltage Equalizing charge voltage (USE)
Boost charge voltage (USE)
Floating charge voltage (USE)
Over-discharge return
voltage (USE)
Over-discharge voltage(USE)
Press and hold the ENTER button for 20 seconds, and
the LCD screen will display F02. Release the button to
restore to default settings and restart the controller.
12V/24V/36V/48V
V
V
VVV

5.7 Load output
5.7.1 Load mode settings
1) Press the “SELECT” button to switch the menus to load mode (from the main menu down to the
9th menu);
2) Press and hold “ENTER” for 2 seconds to light up the settings icon ( ), and enter the load
settings mode;
3) Press and hold “ENTER” again for 2 seconds. The settings icon ( ) blinks and the load mode
number blinks;
4) Press “SELECT” to adjust the load mode cyclically (0-17).
6. Battery Temperature Sampling
By connecting a temperature sensor to the interface ⑦, the battery’s real-time temperature can be sampled.
The temperature defaults to 25℃ when the temperature sensor is not connected. Connect a temperature sensor
and sample the battery temperature for high and low temperature protection for the battery or temperature
compensation for charge voltage of lead-acid battery (no temperature compensation for lithium battery).
7. RS485 Communication Interface
The controller has 2 isolated RS485 communication interfaces, which can be set to communication mode or
parallel mode.
7.1 Set to communication mode: perform data monitoring, parameters settings and other operations for the
controller through the port.
7.2 Set to parallel mode: allows users to use parallel cables to connect multiple controllers via their RS485
interfaces to perform parallel charge. See 5.6 for details.
7.3 Communication interfaces are defined as follows:
No. Definition
①
②
③
④
Isolated power supply positive - 5.0V
D+
D-
Isolated power supply ground
8. Indicators
①
②
③
④
Charge stage indicator
Battery status indicator
Load status indicator
Fault status indicator
8.1 Charge indicator
Load mode menu Go to load mode settings
Load operating mode is as follows:
Number on
LCD screen Load mode name Description
0
Only light control
(Turn on load at night,
and off in the daytime)
When there is no sunlight, the solar panel voltage is smaller than the
light control ON voltage. When the duration is longer than light control
delay that is 5 minutes by default, the load is turned on;
When there is sunlight, the solar panel voltage is greater than the light
control OFF voltage and the controller turns off the load after a 1 minute delay.
1~14 hours Light and time control
for 1~14 hours
When there is no sunlight, the solar panel voltage is smaller than the
light control ON voltage. When the duration is longer than light control
delay that is 5 minutes by default, the load is turned on. After the
working time reaches the set value (light and time control time), the
load is turned off.
When sunlight comes out before the light and time control time is up,
the solar panel voltage is greater than the light control OFF voltage and
the controller turns off the load after a 1 minute delay.
15 Manual mode (default) This mode allows the user to turn the load on/off with a short press on
the button (independent of day and night).
16 Commissioning mode
The mode is used for system commissioning. When there is a light signal,
the load is immediately turned off, and when there is no light signal, the
load is immediately turned on. This facilitates checking the system for right
installation during installation and commissioning.
17 Steady on mode Suitable for 24H uninterrupted power supply applications
Set to communication mode,
communication address 01
Set to parallel mode,
communication address 02
5.7.2 Load short circuit protection settings
In some applications that are particularly prone to interference or for some inductive or capacitive loads
that may have a high current at the moment of power on, and thus may trigger the controller’s load
short circuit protection and cause the load to fail to turn on, you can choose to disable the load short
circuit protection.
1. Setting method:
1) Press the “SELECT” button to switch the menus to load mode interface;
2) Press and hold the “ENTER” button for 2 seconds to light up the settings icon ( ), and enter the
load settings mode;
3) Press the “ENTER” button to switch the menu from load mode to load short circuit protection
enable/disable interface (Scn/ScF);
4) Press and hold the “ENTER” button for 2 seconds, and Scn/ScF blinks;
5) Press the “SELECT” button to switch between “ScF and Scn”. After 5 seconds without pressing any
button, the setting will be saved automatically.
Note: ScF is to disable load short-circuit protection, Scn is to enable load short-circuit protection, and the
default is Enable.
Enable load short-circuit protection Disable load short-circuit protection
12
Set to parallel mode,
communication address 01
11
Indicator status Charging state
MPPT charge
Boost charge
Floating charge
Equalizing charge
Current-limiting charge
Charge is not turned on
Steady on
Slow flash (on for 1s, off for 1s, a cycle of 2s)
Single flash (on for 0.1s, off for 1.9s, a cycle of 2s)
Quick flash (on for 0.1s, off for 0.1s, a cycle of 0.2s)
Double flash (on for 0.1s, off for 0.1s, on again for 0.1s and off for 1.7s, a cycle of 0.2s)
Off

8.3 Load indicator
Indicator status
Off
Steady on
Quick flash (on for 0.1s, off for 0.1s, a cycle of 0.2s)
Load status
Load has been turned off
Load output is normal
Overload/short circuit
8.4 Fault indicator
Indicator status
Off
Steady on
Fault status
System is normal
System failure
9. Menu Display
9.1 Menu diagram
9.2 Menu display
10. Error Codes
LCD
E0
E1
E2
E3
E4
E5
E6
E7
E8
E10
E13
E15
Description
System is normal
Battery over-discharge
Battery over-voltage, battery icon
indicator flashing fast
Battery under-voltage warning
Load short circuit
Load over current
Controller internal over temperature
Battery charge over temperature
protection
Solar panel input power excessive,
charge over current
Solar panel over voltage
Solar panel reverse polarity
Battery not connected or lithium
battery feed
Controller action
No action
Turn off load output; when the battery voltage rises to the
over discharge return voltage, the over discharge is removed,
and the load output resumes
Turn off charging; check the cause of battery over voltage,
and when voltage drops, charging automatically resumes
The battery voltage is lower than the under-voltage warning
threshold. Only alert is given, with no action
Turn off load output
Delay to turn off load at multiples of rated current
The internal temperature of controller is too high, MPPT
controller starts charging with reduced power; when the
temperature is below a certain value, charging automatically
resumes
Turn off charging, and it will automatically resume when
the temperature is below a certain value
MPPT controller charges with limited current
Solar panel over voltage; turn off charging, and it will
automatically resume when the temperature is below the
safety value
Turn off charging and discharging
As long as the solar panel voltage meets the charging
conditions, the lithium battery has constant voltage
output, and the lead-acid battery has no voltage output,
this error returns to normal after battery is connected
8.2 Battery indicator
Indicator status
Steady on
Slow flash (on for 1s, off for 1s, a cycle of 2s)
Quick flash (on for 0.1s, off for 0.1s, a cycle of 0.2s)
Battery status
Battery is normal
Battery over-discharge
Battery over voltage
13 14
System
voltage Battery type
Battery indication Load output indication
Charging
indication
Solar panel
indication
Day indication
Night
indication
Charge
stage
indication Unit display
area
Setting
indication
Communication
indication
Abnormal indication
Parameter
display area
12V/24V/36V/48V
12V
Main screen Solar panel voltage Charge current Charge power
Charge AH
Load current
Load powerDischarge AHLoad modeDevice temperature
Error code

11. Common Troubles and Handling Methods
Troubles Handling methods
Indicators, and LCD screen do not light up
Solar panel has voltage, battery terminal has no
voltage output, but the code E1 is displayed
With 12V/24V/36V/48V normal voltage battery
connected, the battery icon on the LCD screen
flashes slowly and the code E1 is displayed
Controller does not charge
Battery icon on the LCD screen flashes slowly
and the code E1 is displayed
Charge and discharge current is only 30A. Why?
Fault codes present
Other problems or anomalies that are difficult
to resolve
Check if the battery and solar panel are properly connected,
and if the LCD screen cable is poorly connected
No battery is detected on the lead-acid battery terminal,
there is no voltage output at both ends of the battery, it is
back to normal after the battery is connected
Check if the system voltage is set to the battery, or if it is
set to automatically identify and restart the controller; after
setting system voltage, for safety purposes, the system
should be restarted to take effect.
Check if wiring is correct, check if the solar panel voltage
exceeds the rated value and if the battery is over-voltage,
and check LCD error codes for internal over-temperature,
external over-temperature, external lithium battery low
temperature, lead-acid battery open circuit, presence of E10, etc.
Check if the battery is over discharged and if the system
voltage is set incorrectly
Because the system adopts the heat sink + air cooling
technology, when the system detects a fan error, it
automatically limits the maximum charge and discharge
current to 30A
Please refer to the “Error Codes” table for other errors
with error codes
Try F01 reset
Restore the factory settings F02 and set the parameters
according to the system configuration again. Be cautious!
12. Product Installation
12.1 Installation considerations
Be very careful when installing the battery, and wear protective goggles when installing FLD lead-acid
battery. Once in contact with the battery acid, rinse the contact part with water in time.
Avoid placing metal objects in the vicinity of the battery to prevent a short circuit.
Acidic gases may be generated when the battery is charged, so make sure the environment is well ventilated.
Flammable gases may be generated by the battery, so keep away from sparks.
When installing outdoors, avoid direct sunlight and rainwater infiltration.
False connection points and corroded wires may generate great heat that may melt the wire insulation, burn
the surrounding material, or even cause fire, so make sure that the connectors are tightened, and that the
wires are secured with ties to avoid loose connection due to shaking of the wires when the system is moved.
The voltage at the output terminals may exceed the human safety voltage when connecting the system, so
use insulated tools and keep your hands dry.
The battery terminals on the controller can be connected either to a single battery or to a battery pack. The
subsequent instructions in this manual are for use with a single battery, but they also apply to a system with
a battery pack.
Please observe the battery manufacturer’s safety recommendations.
2
The system connection wires should be selected according to the current density of not less than 5A/mm .
Ground the controller via its ground terminal.
Do not connect the battery reversely during installation, as this may cause irreversible damage!
12.2 Installation steps
Wiring and installation methods must comply with national and local electrical code requirements.
Step 1: Choose installation site: avoid installing the controller in place where it is exposed to direct sunlight, high
temperature and water ingress, and make sure the area around the controller is well ventilated.
Step 2: Fix the screws for hanging: mark the mounting location according to the size of the controller, drill two
mounting holes in the two marks, and fix the screws in the two mounting holes.
Step 3: Fasten the controller: align the fixing holes of the controller with the 2 screws and then hang it up.
Step 4: Open the controller front cover, connect wires, and close the front cover.
13.Protections
Device internal over temperature protection
When the internal temperature of the controller exceeds the set value, the charge power will be
automatically reduced or even charging is turned off to further slow down the internal temperature rise of
the controller.
Battery over temperature protection
Battery over-temperature protection requires an external battery temperature sampling sensor. When it
detects an over temperature of the battery, charging will be stopped. When the battery temperature drops
to 5 degrees lower than the set value, and lasts for 2 seconds, charging automatically resumes.
Input over power protection
When the solar panel power is greater than the rated value, the controller will limit the charging power
within the rated power range to prevent excessive current from damaging the controller, and the
controller will enter current limiting charge mode.
15 16
E16
E17
E18
E19
E24
Battery discharge high temperature
protection
Battery discharge low temperature
protection
Overcharge protection
Battery charge low temperature
protection
Fan failure
Turn off load output
Turn off load output
Turn off charging
Turn off charging
Fan is not detected and the maximum charge and
discharge current of the system is 30A
E30 System has disabled charging and
discharging via communication settings
This function can be set through the RS485 communication
port to the relevant registers, and is enabled by default

15. Product Dimensions
Overall dimensions: 275*167*90mm
Mounting holes spacing: 106mm
Mounting hole diameter: φ6mm
16. System Wiring Diagram
16.1 Stand-alone application
16.2 Parallel application
17 18
BATTERY
1
6
13
7
2
1 3
4
Circuit breaker
Fuse
1
6
13
7
1
6
13
7
1
6
13
7
BATTERY BATTERY
14. System Maintenance
The following items are recommended to be checked periodically for the controller to maintain optimum
performance for a long time.
Make sure the airflow around the controller will not be blocked and remove any dirt or debris from the
heat sink.
Take corrective actions in a timely manner in the case of any abnormal malfunction or error alert.
Check the terminals for signs of corrosion, insulation damage, high temperature or burning/discoloration,
enclosure deformation, and if so, promptly repair or replace.
Check for exposed, damaged, insulation performance deteriorated wires, which should be timely repaired
or replaced.
Check for dirt, nesting insects and corrosion, and if so, clean up in time.
Warning: risk of electric shock! Make sure that all power to the controller is disconnected when performing
the above operations, and then check or operate accordingly! Do not operate without authorization if you
are not a professional.
PV input terminal over voltage
When the voltage at the PV array input terminal is too high, the controller will automatically cut off the PV
input.
PV input reverse polarity protection
When the polarity of the PV array is reversed, the controller will not be damaged. After correcting the
wiring error, it will continue to work properly.
Night reverse-current protection
It prevents the battery from discharging at night via solar cells. Special note: Battery reverse polarity
protection is not available.
Circuit breaker
Circuit breaker
Circuit breaker
Fuse Fuse
Fuse