Lumia Max-E Series User manual

User Manual
User Manual_Max-E series_LA
CE, Rohs, ISO9001:2015
Subject to change without notice!
Solar Controller
12/24/36/48V
20/30/40/50/60A
Max-E series
1.03.02.10019-6

Contents
1.
1.1
1.2 Liability Exclusion................................................................................................................................................................1
3.
3.1 Max20/30/40-EU .............................................................................................................................................................3
3.2 Max50/60(48)-E................................................................................................................................................................4
4.
4.1 Characteristics of Max20/30/40-EU.............................................................................................5
4.2 Characteristics of Max50/60(48)-E...............................................................................................5
4.3 Temperature Sensor .......................................................................................................................................................6
4.4 RS485 .....................................................................................................................................................................................6
4.5 Optional Accessories.....................................................................................................................................................6
5.
5.1 Installation Notes............................................................................................................................................................7
5.2 Mounting Location Requirements..........................................................................................................................7
5.3 Wiring Specifications ....................................................................................................................................................8
5.4 Connection .........................................................................................................................................................................8
5.5 Grounding ...........................................................................................................................................................................9
6.Operation ...................................................................................................................................................10
6.1 LCD Display.........................................................................................................................................................................10
6.2 Key function .......................................................................................................................................................................12
6.3 Parameters setting..........................................................................................................................................................13
7.Protections, Troubleshooting and Maintenance ............................................................................15
7.1 Troubleshooting ..............................................................................................................................................................15
7.2 Protection............................................................................................................................................................................16
7.3 Maintenance ......................................................................................................................................................................16
Safety instructions and waiver of liability...............................................................................................1
Safety Instructions ..............................................................................................................................................................1
Pruduct Overview .......................................................................................................................................2
Dimensions ................................................................................................................................................3
Structure & Accessory ............................................................................................................................5
Structure &
Structure &
Installation.................................................................................................................................................7
8.Technical Data .............................................................................................................................................17
2.

1, Safety instructions and waiver of liability
The following symbols are used throughout this manual to indicate potentially dangerous conditions or
mark important safety instructions. Please take care when meeting these symbols.
WARNING: Indicates a potentially dangerous condition. Use extreme caution when
performing this task.
Dear Clients,
Thank you for purchasing our Max-E Series Solar PV Charge Controller. Your support and trust in us are
much appreciated. Please take time to read this manual, this will help you make full use of the many
advantages this controller can provide your PV-System with. This manual presents important
recommendations for installing, operating and monitoring. Read it with special care in your own interest
and please pay attention to the safety recommendations herein indicated.
1.2
The manufacturer shall not be liable for damages, especially on the battery, caused by use other than as
intended or as mentioned in this manual or if the recommendations of the battery manufacturer are
neglected. The manufacturer shall not be liable if there has been service or repair carried out by any
unauthorized person, unusual use, wrong installation, or bad system design.
Liability Exclusion
1.1 Safety Instructions
WARNING:
1) There are no user serviceable parts inside the controller. Do not disassemble or attempt
to repair the controller.
2) Keep children away from batteries and the charge controller.
CAUTION: Indicates a critical procedure for safe and proper operation of the controller.
1

LCD display design, read operating data and working condition easily
12/24/36/48V automatic recognition
Perfect EMC & thermal design
Real-time energy statistics function
Flexible System battery selection: Liquid, Gel, AGM and Lithium
Four stages battery charging process: fast, boost, equalization, float
Multiple load control modes:
Two USB interfaces (Max20/30/40-EU)
IoT wireless communication or Bluetooth communication functions optional (Max50/60(48)-E)
Based RS-485 standard Modbus protocol with RJ11 interface to maximize the communication
needs of different occasions (Max50/60(48)-E)
Full automatic electronic protect function
Extends battery life through accurate remote temperature sensor
Controller is protected against over-temperature due to built-in power reduction function
Always on, Street lamp, User-defind Mode
With your new Max-E series solar charge controller you own a state-of-the art device which was
developed according to the latest available technical standards.
It comes with a number of outstanding features, such as:
2, Overview
2

3, Dimensions
3
96
62
53
Φ4.5
176
189
5.8
15
12/ 2 4V AT U O
Sol a r ch a rge c o nt r o ll e r
3.1 Max20/30/40-EU

4
Unit:mm
R2.25
4
φ4.50
4.50 138
90
187.50
177
88.5
62.50 Max50/60-E
Max50/6048-E
3.2 Max50/60(48)-E

4.2 Characteristics of Max50/60(48)-E Structure &
4.1 Characteristics of Max20/30/40-EU Structure &
4, Structure & Accessory
③
④
⑧⑨ ⑦ ⑤ ⑥
②
①
5
③
④
⑧
⑨⑦
①
②
⑤ ⑥
12 /2 4V AT UO
So la r ch ar ge c on tr ol le r
①Heat Sink
—dissipate controller heat
②Plastic Case
—Internal protection
③LCD
—Display settings and operating status,
system parameters
④Key: MENU、OK
—Set and view the operating parameters
⑤Two USB interfaces
—Output 5V, 2A
⑥Temperature Sensor Port
—Collect temperature information,
Temperature compensation.
⑦ Load Terminals
—Connected load
⑧Battery Terminals
—Connect the battery
⑨Solar module terminals
—Connected solar modules
①Heat Sink
—Dissipate controller heat
②Plastic Case
—Internal protection
③LCD
—Display settings and operating status,
system parameters
④Key: MENU、OK
—Set and view the operating parameters
⑤RJ11 interface
—Connecting monitoring devices
⑥Temperature Sensor Port
—Collect temperature information,
Temperature compensation.
⑦ Load Terminals
—Connected load
⑧Battery Terminals
—Connect the battery.
⑨Solar module terminals
—Connected solar modules

4.5
4.5.1 Bluetooth Communication
Max50/60-E series controllers can be connected to the Cyber-BT(bluetooth) via the RJ11 interface.
Bluetooth communication has the following characteristics：
1. Support mobile phone App
2. Realizes wireless monitoring function of PV charge controller
3. Use high performance, ultra-low power consumption Bluetooth dedicated chip
Option Accessories(only Max50/60(48)-E series are optional)
4. Adopt Bluetooth 4.0 and BLE technology
1.This icon in this specification indicates that this solar controller has Bluetooth communication
function.
2. Refer to Bluetooth APP instructions for detailed operation of mobile APP.
4.5.2 Wireless Communication for Internet of Things
The controller equipped with the Internet of Things wireless communication capability has the following
characteristics:
1. For the wireless Internet of Things communication functionality the controller can be remotely accessed
through IoT/GPRS.
2. A variety of options are available for remote monitoring and real-time control through WeChat App /PC
program.
3. Real-time monitoring of PV voltage, PV charging current, battery voltage, battery current, load voltage,
load current and other system parameters as well as charge controller status.
4. Real-time automatic fault alarm.
Please contact our Sales Team for more details about the IoT wireless communication.
4.3 Temperature Sensor
To collect battery temperature data for temperature compensation so the controller can accurately charge
the battery. The temperature sensor is connected via interface 6.
If the external temperature sensor is not connected or damaged, the controller defaults to the internal
temperature information.
The controller is shipped with an 80 mm long cable temperature sensor. Should a sensor with a longer
cable be required than this needs to be ordered separately.
4.4 RS485(just for Max50/60(48)-E)
The charger is equipped with a RS485 port with RJ11 sockets, the RJ11 interface is defined as follows:
!Protocol applicable to this controller: Modbus Communication Protocol V3.9
RJ11 for controller
12 3 4 5 6
NC RS 48 5-B RS 48 5-A NC NC NC
Pin No. Definition
1NC
NC
NC
RS485-A
RS485-B
NC
2
4
3
5
6
The RS485 interface on this charger is not galvanically isolated and can not be grounded.
Do not short circuit unused pin (Note NC).
6

>15CM
>15CM
COOL AIR
WARM AIR
5, Installation
5.1 Installation Notes
⑴ This charge controller must only be used in PV systems in accordance with requirements given in this
user manual and the specifications of other system components provided by their manufacturers. No
energy source other than a PV generator may be connected to the PV charge controller referred herein.
⑵PV-modules must always be disconnected prior to the installation and adjustments of the charge
controller; Make sure the circuit breaker, fuse or disconnects of battery terminal are turned off.
⑶ Double check whether battery voltage meets the voltage range of Charge Controller.
⑷Batteries store a large amount of energy, never short circuit a battery under any circumstances. We
strongly recommend connecting a protection fuse directly to the battery terminal for protection in case of
short circuiting the battery.
⑸Batteries can produce flammable gases. Avoid provoking any sparks, using fire or any exposed flame
close to any batteries, ever. Make sure that the battery room is well ventilated to disperse any gases.
⑹Only use insulated tools and avoid placing (any) metal objects near/close to batteries.
⑺Be extremely cautious when working with batteries. Wear eye protection by all means. Have fresh water
available to immediately wash and clean any contact with battery acid. Get immediately medical aid in
case of any hazard that may occur. Never install/handle with batteries alone.
⑻Avoid touching or short-circuiting wires or terminals. Be aware that voltages on given system
components, terminals or wires can be a multiple of battery voltage. Only use insulated tools, stand on dry
ground, and keep your hands always dry and protected by proper (approved) electrician gloves when
working on PV-Systems.
⑼Prevent any water, ever, from penetrating the controller, outdoor installation must avoid any direct
sunlight and penetration of any water (e.g. rain) and humidity.
⑽After installation make sure that all connections are properly tighten, eliminate any electrical loose
connections to eliminate by all means any hot electrical connection spots.
CAUTION: Please read all instructions and precautions in the manual before proceeding
with the installation! It is recommended to remove the protective film cover from the
LCD screen before operation.
5.2 Mounting Location Requirements
Do not subject the PV charge controller to direct sunlight or any other heat sources. Protect the PV charge
controller from any dust, dirt and moisture. Mount it flat to a vertical wall. Must be a non-flammable
material. Maintain a minimum clearance of 15 cm below and around the controller to ensure unhindered
air circulation. Mount the PV charge controller not too far from the batteries (for accurate voltage sensing
least lessening).
Mark the position of the PV charge controller fastening holes on the wall, drill 4 holes and insert dowels,
fasten the PV charge controller to the wall with the cable openings facing downwards.
7

Model Rated charging
current
Rated
discharging
current
Solar wire
diameter
(mm²/AWG)
Battery wire
diameter
(mm²/AWG)
Load wire
diameter
(mm²/AWG)
Max20-EU 20A 20A 5/10 5/10 5/10
Max30-EU 30A 30A 6/9 6/9 6/9
Max40-EU 40A 40A 10/8 10/8 10/8
Max50/5048-E 50A 30A 16/5 16/5 6/9
Max60/6048-E 60A 30A 16/5 16/5 6/9
5.4 Connection
We strongly recommend connecting a fuse directly to the battery terminal to protect from any short
circuit in the battery circuit. PV-modules generate current whenever light shines on them. The generated
current is directly proportional to the light intensity. Even low levels of light, will deliver the PV-Modules
no load, full voltage. It is thus utterly advisable to protect PV-modules from any incident light during
installation; Never touch uninsulated cables (ends), only use electric insulated tools, and make sure that
the wire cross section is adequate for the PV module operating currents. Connections must always be
conducted in the sequence as described below
5.3 Wiring Specifications
Wiring and installation methods must comply with national and local electrical code/specifications.
The wiring specifications of the PV-system battery must be selected according to rated currents. Please check
following table for wiring specifications:
!
controller or between the controller and the battery are required, than larger capacity cables must be
used to reduce voltage drop and improve system performance.
The indicated cable/wire sizes are for reference only. If longer runs between the PV array and the
⑤
⑥
①
②
③④
WARNING: The PV-module/array can produce open-circuit voltages in excess of 100 Vdc
when exposed to sunlight. Pay highest attention to this fact.
WARNING: Risk of explosion! In case the battery's positive and negative terminals or
leads get ever in touch, i.e. short-circuited, a fire or explosion hazard might get triggered.
Always pay maximum when handling batteries and related circuits.8
Inverter
Relay

1st step: Connect loads
Connect the load cable with the correct polarity of the right-hand side pair of terminals on the solar
charge controller (with the lamp symbol). To avoid the presence of any tension on the cable/wires, please
connect these first to the load before connecting them to the charge controller.
2nd step: Connect the battery
Connect the battery cables observing the correct polarity to the center pair of terminals (make sure you
identify the battery marking/symbol on the controller casing!) of the PV charge controller. Pay greatest
attention to polarity. Never, ever invert the plus+ and minus- poles).
1)Should your system be nominal 12 Vdc, make sure the battery voltage is between the 10.0 and 15.0 Vdc
voltage range;
2)for 24 Vdc nominal voltage, the battery voltage should be within the 20.0 to 30.0 Vdc range;
3)for 36 Vdc nominal voltage, the battery voltage should be within the 31.0 to 42.0Vdc;
4)for 48 Vdc nominal voltage, the battery voltage should be within the 42.0 to 62.0Vdc.
If the polarity is correct, the LCD on the controller will begin to display those.
3rd step: Connect the solar module
When connecting the PV-Module make sure to cover it from incident sun light. Double check the PV-
Module will not exceed the maximum permissible input current of the Charge Controller (please refer to
the section Technical Data). Connect the solar module connection cable to the correct polarity of the left
pair of terminals on the solar charge controller (with the solar module symbol).
4th step: Final work
Tighten all cables connected to the controller and remove all the remains around the controller (leaving a
void of minimum 15 cm).
5.5 Grounding
Be aware that the positive terminals of controller are interconnected and therefore bear the same
electrical potential. If any grounding is required, always do this on the positive wires/terminals.
CAUTION: 1. If no temperature sensor is connected to the controller, the battery
temperature value will display the internal temperature.
2.If a power inverter is used the system, it should be connected to the battery via a DC
relay. Do not connect it to the controller's load terminals.
9

6.1 LCD Display
6.1.1 Status Description
Item Icon Status
PV array
Daytime, not charging
Daytime, charging
Night
PV voltage、 current and ampere hours
The total charge ampere hours of the solar panel
Battery
Battery capacity
Battery voltage(Programmable LVD)
Battery current
Battery state of charge(in %)
Temperature(Clear external Bluetooth Device Password)
Battery type(Programmable)
Load
Fault
Load current and ampere hours
Load voltage(Programmable LVR) *
The total discharge ampere hours of the load
Load mode(Programmable)
The load is on
The load is off
Fault indication, see 6.1.4
!PV array charge ampere hours and load ampere hours are off after power failure。
6, Operation
10
*Max-EU can not set LVR.

6.1.3 Press OK to browse the interface
6.1.2 The interface automatically cycles in the displayed sequence
11

Mode
6.2 Key function
Browse interface
Static display
Short press OK
Press the MENU and OK key at the same time for 1s, the LCD screen
will lock the interface.
Press the MENU and OK key again for 1s, the LCD interface will unlock
and start scrolling.
Press the MENU key for 1s to enter the setting mode when the
icon appears on the display interface, and exit automatically after 30s
When the controller is working in street lamp mode, press the MENU
key for 3s to turn on the load, press the MENU key again or 1min later
the load will be turned off.
Setting parameter
Load On/Off
Operating
Status Icon Description
Low voltage
Over voltage
Battery level shows empty, fault icon display,
battery frame flashes, the LCD screen displays E3
Battery level shows full, fault icon display,
battery flashes, the LCD screen displays E4
Load off, fault icon display, load icon flashes,
the LCD screen displays E1
Load off, fault icon display, load icon flashes,
the LCD screen displays E2
The charge and discharge are off, fault icon display,
icon ℃ flashing, the LCD screen displays E5
Controller does not correctly identify system voltage.
Controller does not
correctly identify
system voltage
Short circuit
Over current
Over temperature
E1
E2
E3
E4
E5
MENU OK
6.1.4 Fault indication
12

When the icon appears in the display interface, it means that the parameters can be set. Press the
MENU key for 1s, then icon flashes, press OK to change the parameter.
6.3.1 Low voltage protection(LVD)
6.3.2 Low voltage reconnect(LVR)
①Battery voltage control
②Battery capacity control
When the LCD shows as left, press the MENU key for 1s, the
icon flashes, you can press OK to clear the Bluetooth device
password set by the mobile app.
displayed at
6.3 Parameters setting
2.Liquid, Gel and AGM Battery
The low voltage protection of the controller can be divided into two
types: battery voltage control and capacity control.
11.0~11.6V/22.0~23.2V/33.0~34.8V/44.0~46.4V
11.1~11.7V/22.2~23.4V/33.3~35.1V/44.4~46.8V
11.2~11.8V/22.4~23.6V/33.6~35.4V/44.8~47.2V
11.4~11.9V/22.8~23.8V/34.2~35.7V/45.6~47.6V
11.6~12.0V/23.2~24.0V/34.8~36.0V/46.4~48.0V
Display Low voltage protection range
The low voltage recovery voltage(LVR) should be higher than the low voltage protection voltage
(LVD) at least 0.6/1.2/1.8/2.4V. If it is desired to improve LVD, than LVR must improved first.
6.3.3 Clear Bluetooth Device Password
For device passwords, please refer to Bluetooth APP instructions.
1.Lithium Battery(Max50/60(48)-E)
Low voltage protection setting range:
12/24V: 9.0-30.0V (default: 10.6V)
12/24/36/48V: 9.0-60.0V (default: 21.0V).
When the LCD shows as displayed at left, press the MENU key for 1s,the
icon flashes, now you can set the controller low voltage protection.'s
Low voltage protection setting range：
10.8~11.8V/21.6~23.6 V(default: 11.2/22.4/33.6/44.8V)./32.4~35.4/43.2~47.2
1.Lithium Battery
2.Liquid, Gel and AGM Battery
Low voltage reconnect setting range is:
12/24V: 9.6-31.0V (default: 12.0V)
12/24/36/48V: 9.6-62.0V (default: 22.4V).
Low voltage reconnect setting range：
(default : 12/24/36/48V).11.4~12.8/22.8~25.6/34.2~38.4/45.6~51.2V
When the LCD shows as left, press the MENU key for 1s, the
icon flashes, you can set the controller low voltage reconnect.
displayed at
's
13
12.4/24.8/37.2/49.6V
12.5/25.0/37.5/50V
12.6/25.2/37.8/50.4V
12.7/25.4/38.1/50.8V
12.8/25.6/38.4/51.2V
Low voltage reconnect
!Max-EU series can not set LVD, its LVD is 0.8/1.6v higher than LVR by default.

6.3.4 Batter y type
When the LCD shows left, press the MENU key for 1s,the
icon flashes , you can set the battery type.
as displayed at
Battery type
GEL(Default)
Liquid
Lithium
AGM
Display
1.Charging Voltage Parameters(Liquid, GEL, AGM)
When choosing Liquid, GEL or AGM for battery type, the parameters of boost, and float
charge voltage can be set by IoT, RS485 or bluetooth APP. The range of parameters is as follows.
The following voltage parameters are 25℃/12V system parameters, 24/36/48V displayed values are
multiplied by a factor of 2/3/4.
equalization
Boost
Charging Voltage Range
Default charging voltage
Charging stage
14.0~14.8V
14.5V
14.0~15.0V
14.8V
13.0~14.5V
13.7V
Float
Equalization
2. thium
The controllers are suitable for all kinds of lithium batteries. When choosing lithium battery type, the
overcharge protection and overcharge recovery voltage of lithium battery can be set by IoT, RS485 or
bluetooth APP.
Charge target voltage range: 12/24V: 10.0-32.0V (default:14.4V)
12/24/36/48V: 10.0-64.0V (default:29.4V)
Charge recovery voltage setting range: 12/24V: 9.2-31.8V (default:14.0V)
12/24/36/48V: 9.2-63.8V (default:28.7V)
Charging Voltage Parameters(Li )
Note: 1.
2. (Overcharge Recovery Voltage+1.5V)≥Lithium Overcharge Protection Voltage≥
(Overcharge Recovery Voltage+0.2V)
Parameter setting out of range is not supported.
Max EU cannot be set as a lithium battery controller.
Warning: The required accuracy of BMS shall be at least 0.2V. If tolerance is larger than 0.2V,
manufacturer will not assume any liability for any consequent system malfunction.
6.3.5 Load mode
When the LCD shows left, press the MENU key for 1s, the
icon flashes, you can set the load mode.
as displayed at
Display Load mode
Always on Mode:
The load output is always switched on.
Dusk to Dawn Mode: The load output is
switched on between sunset and sunrise.
Evening Mode: The load output will be
switched on for 2~9hours after sunset.
Manual Mode: The load output can be
switched on and off manually by pressing
MENU shortly.
1.Always on Mode
When the controller is set to always On mode, no matter the charging or discharging state, the
load is always powered on (except in protection state). 14

2.Street lamp Function
When the load is set to Dusk to Dawn or Evening mode, the voltage and the
Day/Night delay t can be set b IoT, RS485 or bluetooth APP, and the load can be turned on or off by
the test function during the day charging process.
2.1
The controller recognizes day and night based on the solar array open circuit voltage.
This day/night threshold voltage can be modified according to local light conditions and the solar array
used. Max-EU defaults to 5.0/10.0V.
Day/Night threshold setting range: 3.0~10/6.0~20/9.0~30.0/12~40V(Default: 8/16/24/32V)
2.2 Day/Night delay time
In the evening, when the solar array open circuit voltage reaches the setting day/night detect voltage, you
can adjust the day/night delay time to make the load turn on a little bit later.
Day/Night delay time setting range: 0~30min(Default: 0min)
2.3 Test Function
When the controller is working in Dusk to Dawn or Evening mode, press the MENU key for 3s to turn on
the load. Press the MENU key again or the load turns off automatically after 1 minute.
If the controller is operating in always on mode, the test function does not work.
3.User-definde Mode
①If the load mode is selected "USE", then you can switch on and off the load output manually by
pressing MENU shortly.
②The default switching state of the load in manual mode can be changed by IoT, RS485 or
bluetooth APP. At the same time, the output to the load can be turned on or off.
Day/Night threshold
ime y
Day/Night threshold voltage
1.If the controller turns off the load due to low voltage protection、overcurrent
protection、short-circuit protection or over temperature protection, the load will turn on
automatically when the controller recovers from protection state.
2.Please note: Pushing the MENU button can still activate the function of the key, even
during of the above four kinds protection states.
Faults Reason Troubleshooting
Battery voltage is too low
Reduce the load, the controller will resume
work after 1minute.
After the temperature decreases,
the controller will work normally
Battery voltage is too high
Short Circuit
Over Current
Over temperature
E1
E2
E3
E4
E5
Switch off all loads, remove short circuit, load will be
reconnected after 1 minute automatically
Check if other sources overcharge the battery.
If not, controller is damaged.
Load will be reconnected when battery is recharged
7.1Troubleshooting
7, Troubleshooting, and maintenance Protections
Bat ter y c an t
be charged
dur ing day time
'
Battery voltage is abnormal
at start-up
PV panel fault or reverse
connection Check panels and connection wires
Charge or discharge the battery so that the
batter y voltage is within the normal
operating range
(10~15V or 20~30V or 31~42 or 42~62V)
15
6.4 USB interface(Max-EU)
Max-EU series have two USB interfaces, maximum output of single USB is 5V 1.5A, maximum output of two
USB is 5V 2A, for charging mobile phones and other smart devices.
The USB stops output only when the controller is in low voltage protection.

Make sure no block on air-flow around the controller. Clear up any dirt and fragments on radiator.
Check all the naked wires to make sure insulation is not damaged. Repair or replace some wires if
necessary.
Tighten all terminal screws to the indicated torque; Inspect for loose, broken, or burnt cable/wire
connections.
Check and confirm that LCD is consistent with required. Pay attention to any troubleshooting or error
indication. Take corrective action if necessary.
Make sure all system components are effectively and tightly connected to ground.
Check all terminals for any corrosion signs, damaged insulation, increased temperature or
carbonization/discolored signs.
Check for any dirt, nesting insects and any corrosion signs. Implement corrections actions as early as
possible.
WARNING：Risk of electric shock!
Make sure that all the power is turned off before above operations,
and then follow the corresponding inspections and operations.
7.3 Maintenance
For best system performance, the following inspections and maintenance tasks are recommended to be
carried out for at least two times a year.
7.2 Protection
PV Short Circuit
PV Reverse Polarity
Charging over current The controller will limit charging current on battery to the rated level.
When PV short circuit occurs, the controller will stop charging.
Remove it to resume normal operation.
Fully protection against PV reverse polarity, no damage to the controller.
Correct the connection to resume normal operation.
Fully protection against battery reverse polarity, no damage to the controller.
Correct the connection to resume normal operation.
Should there are other energy sources to charge the battery, when the battery
voltage exceeds 15.8 / 31.3 / 46.8 / 62.3V(Overcharge protection voltage of
lithium battery equals target voltage plus 0.2V), the controller will stop charging
to protect the battery from overcharging damage.
When battery voltage drops to the low voltage disconnect setting, the controller
will stop discharging to protect the battery from over discharging damage.
If the load current exceeds the maximum load current rating 1.25 times, the
controller will disconnect the load.
Once the load short circuit happens , the load short circuit protection will
trigger automatically.
The controller detects the internal temperature through internal sensor, when
the temperature exceeds the setting value, the charging current will decrease,
and consequently, the controllers temperature; Should controllers temperature
rise and approach over temperature protection threshold, the controller will
stop its operation and resume after temperature lowers/returns to an
acceptable level.
Should the temperature sensor be short-circuited or damaged, the controller
will be charging or discharging at the internal temperature automatically to
prevent the battery damaged from overcharging or over discharged.
Protection Description
Battery Reverse Polarity
Battery Over voltage
Battery Over discharge
Load Over Current
Protection
Load Short Circuit
Protection
Over Temperature
Protection
Damaged Remote
Temperature Sensor
16
!
the existing fault .
Two or more errors at the same time can damage the controller, so you must troubleshoot

8, Technical Data
17
Max20-EU Max30-EU Max40-EU
12V/24V automatical recognization
20A 30A 40A
<14.5/29.0V@25℃
14.5/29.0V @25℃
14.8/29.6V @25℃（Liquid, AGM）
13.7/27.4V @25℃
10.8~11.8V/21.6~23.6V, SOC1~5（default: 11.2/22.4V)
11.6~12.8V/23.2~25.6V（default: 12.0/24.0V)
15.5/31.0V
35V
-4.17mV/K per cell (Boost, Equalization)，
-3.33mV/K per cell (Float)
Liquid, Gel，AGM（default: Gel)
55V
5.0/10.0V
20A 30A 40A
5V, 2A
Always on, Dusk to Dawn, Evening, Manual
189 * 96 * 53mm
420g
5mA
Common positive
8AWG(10mm²)
-20 ~ +50℃
-25 ~ +80℃
0 ~ 100%RH
IP32
4000m
* Around oblique line value separately on behalf of 12V and 24V system's value.
Item
System Voltage
Max Charging Current
Fast Voltage
Boost Voltage
Equalization Voltage
Float Voltage
Low Volt. Disconnect
Reconnect Voltage
Overcharge Protect
Max volt on Bat. terminal
Temp. Compensation
Battery Type
Max volt on PV terminal
Dusk/Dawn detect volt.
Output Current
USB interface
Load mode
Dimensions
Weight
Self consumption
Grounding
Power ternimals
Ambient temperature
Storage temperature
Ambient humidity
Protection degree
Max Altitude
Battery
Param
eters
Panel
Param-
eters
Load
System
Param-
eters

*1. Maximum solar panel voltage at minimum ambient operating temperature.
*2. Around oblique line value separately on behalf of 12V and 24V system's value.
Battery
Param
eters
Panel
Param-
eters
Load
System
Param-
eters
Max50-E Max60-E
50A 60A
12/24V automatic recognition
35V
Gel, AGM, Liquid, Lithium（default: Gel)
before boost or equalization charging stage
14~14.8/28~29.6V @25℃(default: 14.5/29V)
14~15.0/28~30V@25℃(default: 14.8/29.6V)(Liquid, AGM)
13~14.5/26~39V @25℃(default: 13.7/27.4V)
10.8~11.8V/21.6~23.6V(default: 11.2/22.4V)
11.4~12.8V/22.8~25.6V（default: 12.0/24.0V)
15.8/31.3V
-4.17mV/K per cell (Boost, Equalization)，
-3.33mV/K per cell (Float)
10.0~32.0V(Lithium, default: 14.4V)
9.2~31.8V(Lithium, default: 14.0V)
9.0~30.0V(Lithium, default: 10.6V)
9.6~31.0V(Lithium, default: 12.0V)
55V
Lithium:
Gel, AGM and Liquid:
~min
30A
Always on(Default) , Street lamp, User-defind Mode
138*187.5*62.5mm
720g
10mA
RS485(RJ11 interface)
IoT, Cyber-BT
Common Positive
6AWG(16mm²)
-20 ~ +55℃
-25 ~ +80℃
0 ~ 100%RH
IP32
4000m
3.0~20.0V(Programmable)
3.0~10.0/6.0~20.0V(Programmable)
0 30
Item
Max Charging Current
System Voltage
Max volt on Bat. terminal
Battery Type
*1
Max volt on PV terminal
Day/Night threshold
Day/Night delay Time
Output Current
Load mode
Dimensions
Weight
Self consumption
Communication
Optional
Grounding
Power terminals
Ambient temperature
Storage temperature
Ambient humidity
Protection degree
Max Altitude
Fast Charging Voltage
Boost Voltage
Equalization Voltage
Float Voltage
Low Volt. Disconnect
Reconnect Voltage
Overcharge Protect
Temp. Compensation
Charging target voltage
Charging recovery voltage
Low voltage disconnect
Low voltage reconnect
Liquid,
Gel and
AGM
Lithium
18