PowMr 60A 12V/24V/36V/48V Auto MPPT Solar Charge
Controller User Manual

PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual

Model ML4860
Battery voltage12V/24V/36V/48V
Max. solar panel
voltage
150V (25°C), 145V (-25°C)
Max. input power800W/12V; 1600W/24V; 2400W/36V; 3200W/48V
Charging current60A
Discharging current20A

Dear users,
Thank you for choosing our product!

Safety Instructions

  1. As this controller deals with voltages that exceed the top limit for human safety, do not operate it before reading this manual carefully and completing safety operation training.
  2. The controller has no internal components that need maintenance or service, thus do not attempt to disassemble or repair the controller.
  3. Install the controller indoors, and avoid component exposure and water intrusion.
  4. During operation, the radiator may reach a very high  temperature, therefore install the controller at a place with good ventilation conditions.
  5. It’s recommended that a fuse or breaker be installed outside the controller.
  6. Before installing and wiring the controller, make sure to disconnect the photovoltaic array and the fuse or breaker close to the battery terminals.
  7. After installation, check if all connections are solid and reliable so as to avoid loose connections that may give rise to dangers caused by heat accumulation.

PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Warning risk of explosion icon Warning: means the operation in question is dangerous, and you should get properly prepared before proceeding. 

⚠️Note: means the operation in question may cause damage. 

💡Tips: means advice or instruction for the operator. 

Product Introduction

Product Overview

This product can keep monitoring the solar panel’s generating power and tracking the highest voltage and current values (VI) in real time, enabling the system to charge the battery in maximum power. It’s designed to be used in off-grid photovoltaic systems to coordinate operation of the solar panel, battery and load, functioning as the core control unit in off-grid photovoltaic systems.

This product features an LCD screen which can dynamically display the operating status, operating parameters, controller logs, historical data, control parameters, etc. Users can check parameters using the keys, and modify control parameters to cater to different system requirements.

The controller utilizes standard Modbus communication protocol, making it easy for users to check and modify system parameters on their own. Besides, with the free monitoring software we provide, users’ varied remote monitoring needs can be well satisfied.

With comprehensive electronic fault self-detecting functions and powerful electronic protection functions built inside the controller, component damage caused by installation errors or system failures can be avoided to the greatest extent possible.

Product Features

  • With the advanced dual-peak or multi-peak tracking technology, when the solar panel is shadowed or part of the panel fails resulting in multiple peaks on the I-V curve, the controller is still able to accurately track the maximum power point.
  • A built-in maximum power point tracking algorithm can significantly improve the energy utilization efficiency of photovoltaic systems, and raise the charging efficiency by
    15% to 20% compared with the conventional PWM method.
  • A combination of multiple tracking algorithms enables accurate tracking of the optimum working point on the I-V curve in an extremely short time.
  • The product boasts an optimum MPPT tracking efficiency of up to 99.9%.
  • Advanced digital power supply technologies raise the circuit’s energy conversion efficiency to as high as 98%.
  • Different charging program options including those for gel batteries, sealed batteries and open batteries, customized ones, etc. are available.
  • The controller features a limited current charging mode. When the solar panel power exceeds a certain level and the charging current is larger than the rated current, the controller will automatically lower the charging power and bring the charging current to the rated level.
  • Instantaneous large current startup of capacitive loads is  supported.
  • Automatic recognition of battery voltage is supported.
  • LED fault indicators and an LCD screen which can display abnormality information help users to quickly identify system faults.
  • Historical data storage function is available, and data can be stored for up to a year.
  • The controller is equipped with an LCD screen with which users can not only check device operating data and statuses, but also modify controller parameters.
  • The controller supports standard Modbus protocol, fulfilling the communication needs of various occasions.
  • All communications are electrically isolated, so users can rest assured in usage.
  • The controller employs a built-in over-temperature protection mechanism. When temperature surpasses the set value, the charging current will decline in linear proportion to the temperature and discharging will be halted so as to curb the temperature rise of the controller, effectively keeping the controller from being damaged by overheat.
  • With the help of an external battery voltage sampling function, battery voltage sampling is exempted from the effect of line loss, making control more precise.
  • Featuring a temperature compensation function, the controller can automatically adjust charging and discharging parameters in order to extend the battery’s service life.
  • The controller also features a battery over-temperature protection function, and when the external battery temperature exceeds the set value, charging and discharging will be shut off so as to protect components from being damaged by overheat.
  • TVS lighting protection

Exterior and InterfacesPowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Exterior and Interfaces

PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Fig. 1-1

PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Exterior and Interfaces figure 1
Fig. 1-1 Product appearance and interfaces
No.ItemNo.Item
1Charging indicator10Battery “-” interface
2Battery indicator11Load “-” interface
3Load indicator12Battery “+” interface
4Abnormality indicator13Load “+” interface
5LCD screen14External temperature sampling interface
6Operating keys15Battery voltage compensation interface
7Installation hole16RS232 communication interface
8Solar panel “+” interface17RS485 communication interface
9Solar panel “-” interface

Introduction to Maximum Power Point Tracking Technology

Maximum Power Point Tracking (MPPT) is an advanced charging technology that enables the solar panel to output more power by adjusting the electric module’s operating status. Due to the nonlinearity of solar arrays, there exists a maximum energy output point (maximum power point) on their curves. Unable to continuously lock onto this point to charge the battery, conventional controllers (employing switching and PWM charging technologies) can’t get the most of the power from the solar panel. But a solar charge controller featuring MPPT technology can continuously track arrays’ maximum power point so as to get the maximum amount of power to charge the battery.

Take a 12V system as an example. As the solar panel’s peak voltage (Vpp) is approximately 17V while the battery’s voltage is around 12V, when charging with a conventional charge controller, the solar panel’s voltage will stay at around 12V, failing to deliver the maximum power. However, the MPPT controller can overcome the problem by adjusting the solar panel’s input voltage and current in real time, realizing a maximum input power.

PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Fig 1
Fig. 1-2 Solar panel output characteristic curve

Compared with conventional PWM controllers, the MPPT controller can make the most of the solar panel’s max. power and therefore provide larger charging current. Generally speaking, the latter can raise the energy utilization ratio by 15% to 20% in contrast with the former.

PowMr 60A 12V/24V/36V/48V Auto MPPT Solar Charge Controller User Manual
Fig. 1-3 Relation between solar panel output characteristics and illumination
PowMr 60A 12V/24V/36V/48V Auto MPPT Solar Charge Controller User Manual
Fig. 1-4 Relation between solar panel output characteristics and temperature

Charging Stages Introduction

As one of the charging stages, MPPT can’t be used alone, but has to be used together with boost charging, floating charging, equalizing charging, etc. to complete charging the battery. A complete charging process includes: fast charging, sustaining charging and floating charging. The charging curve is as shown below:

PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Fig. 1-5
Fig. 1-5 Battery charging stages diagram

a) Fast charging 

At the fast charging stage, as the battery voltage has not reached the set value of full voltage (i.e. equalizing/ boost voltage) yet, the controller will perform MPPT charging on the battery with the maximum solar power. When the battery voltage reaches the preset value, constant voltage charging will begin.

b) Sustaining charging

When the battery voltage reaches the set value of sustaining voltage, the controller will switch to constant voltage charging. In this process, no MPPT charging will be performed, and meanwhile the charging current will also gradually decrease. The sustaining charging stage itself consists of two sub-stages, i.e. equalizing charging and boost charging, the two of which are not carried out in a repeated manner, with the former getting activated once every 30 days.

  • Boost charging
    By default, boost charging generally lasts for 2h, but users can adjust preset values of duration and boost voltage point according to the actual needs. When the duration reaches the set value, the system will then switch to floating charging.
  • Equalizing charging

PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Warning risk of explosion icon Warning: risk of explosion!
In equalizing charging, an open lead-acid battery can produce explosive gas, therefore the battery chamber shall have good ventilation conditions.

⚠️ Note: risk of equipment damage!
Equalizing charging may raise the battery voltage to a level that may cause damage to sensitive DC loads. Check and make sure that allowable input voltages of all the loads in the system are greater than the set value for battery equalizing charging.

⚠️ Note: risk of equipment damage!
Overcharge or too much gas generated may damage battery plates and cause active material on the battery plates to scale off.  Equalizing charging to an excessively high level or for too long a period may cause damage. Read carefully the actual requirements of the battery deployed in the system.

Some types of batteries benefit from regular equalizing charging which can stir the electrolyte, balance the battery voltage and finish the electrochemical reaction. Equalizing charging raises the battery voltage to a higher level than the standard supply voltage and gasify the battery electrolyte. If the controller then automatically steers the battery into equalizing charging, the charging duration is 120 minutes (default). In order to avoid too much generated gas or battery overheat, equalizing charging and boost charging won’t repeat in one complete charging cycle.

Note:

  1. When due to the installation environment or working loads, the system can’t continuously stabilize the battery voltage to a constant level, the controller will initiate a timing process, and 3 hours after the battery voltage reaches the set value, the system will automatically switch to equalizing charging.
  2. If no calibration has been done to the controller clock, the controller will perform equalizing charging regularly according to its internal clock.
  • Floating charging

When finishing the sustaining charging stage, the controller will switch to floating charging in which the controller lowers the battery voltage by diminishing the charging current and keeps the battery voltage at the set value of floating charging voltage. In the floating charging process, very light charging is carried out for the battery to maintain it at full state. At this stage, the loads can access almost all the solar power. If the loads consume more power than the solar panel could provide, the controller will not be able to keep the battery voltage at the floating charging stage. When the battery voltage drops to the set value for returning to boost charging, the system will exit floating charging and reenter into fast charging.

Product Installation

Installation Precaution

  • Be very careful when installing the battery. For open lead-acid batteries, wear a pair of goggles during installation, and in case of contact with battery acid, flush with water immediately.
  • In order to prevent the battery from being short-circuited, no metal objects shall be placed near the battery.
  • Acid gas may be generated during battery charging, thus make sure the ambient environment is well ventilated.
  • Keep the battery away from fire sparks, as the battery may produce flammable gas.
  • When installing the battery outdoors, take sufficient measures to keep the battery from direct sunlight and rain water intrusion.
  • Loose connections or corroded wire may cause excessive heat generation which may further melt the wire’s insulation layer and burn surrounding materials, and even cause a fire, therefore make sure all connections are tightened securely. Wires had better be fixed properly with ties, and when needs arise to move things, avoid wire swaying so as to keep connections from loosening.
  • When connecting the system, the output terminals’ voltage may exceed the top limit for human safety. If operation needs to be done, be sure to use insulation tools and keep hands dry.
  • The wiring terminals on the controller can be connected with a single battery or a pack of batteries. Following descriptions in this manual apply to systems employing either a single battery or a pack of batteries.
  • Follow the safety advice given by the battery manufacturer.
  • When selecting connection wires for the system, follow the criterion that the current density is not larger than 4A/mm2.
  • Connect the controller’s earth terminal to the ground.

Wiring Specifications

Wiring and installation methods must comply with national and local electrical specifications.

The wiring specifications of the battery and loads must be selected according to rated currents, and see the following table for wiring specifications:

Model Rated
charging
current
Rated
discharging
current
Battery wire
diameter
(mm2)
Load wire
diameter
(mm2)
Battery
voltage
compensation
wire
ML486060A 20A >15<5 No
requirements

Installation and Wiring

PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Warning risk of explosion icon Warning: risk of explosion! Never install the controller and an open battery in the same enclosed space! Nor shall the controller be installed in an enclosed space where battery gas may accumulate. 

PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Warning risk of explosion icon Warning: danger of high voltage! Photovoltaic arrays may produce a very high open-circuit voltage. Open the breaker or fuse before wiring, and be very careful during the wiring process.

⚠️Note: when installing the controller, make sure that enough air flows through the controller’s radiator, and leave at least 150 mm of space both above and below the controller so as to ensure natural convection for heat dissipation. If the controller is installed in an enclosed box, make sure the box delivers reliable heat dissipation effect. PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Fig. 2.1

Step 2: fit screws in
According to the installation dimensions of the product, use a marker pen to mark the mounting points, then drill 4 mounting holes at the 4 marked points, and fit screws in.

Step 3: fix the controller
Aim the controller’s fixing holes at the screws fit in Step 2 and mount the controller on.PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Aim the controller's fixing holes at the screws fit in Step 2 and mount
Step 4: wire
First remove the two screws on the controller, and then begin wiring operation. In order to guarantee installation safety, we recommend the wiring order as indicated by the numbers in the following diagram (Fig.
2.3); however, you can choose not to follow this order and no damage will be incurred to the controller.PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Fig. 2.3

  1.  Connecting to external temperature sampling interface and connecting battery voltage compensation cable
  2. Connecting communication cable
  3. Connecting power cable
    PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Warning risk of explosion icon Warning: risk of electric shock! We strongly recommend that fuses or breakers be connected at the photovoltaic array side, load side and battery side so as to avoid electric shock during wiring operation or faulty operations, and make sure the fuses and breakers are in open state before wiring.
    PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Warning risk of explosion icon Warning: danger of high voltage! Photovoltaic arrays may produce a very high open-circuit voltage. Open the breaker or fuse before wiring, and be very careful during the wiring process.
    PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Warning risk of explosion icon Warning: risk of explosion! Once the battery’s positive and negative terminals or leads that connect to the two terminals get short-circuited, a fire or explosion will occur. Always be careful in operation.
    First connect the battery, then the solar panel, and finally the load. When wiring, follow the order of first “+” and then “-“.
  4. Power on
    After connecting all power wires solidly and reliably, check again whether wiring is correct and if the positive and negative poles are reversely connected. After confirming that no faults exist, first close the fuse or breaker of the battery, then see whether the LED indicators light up and the LCD screen displays information. If the LCD screen fails to display information, open the fuse or breaker immediately and recheck if all connections are correctly done.

If the battery functions normally, connect the solar panel. If sunlight is intense enough, the controller’s charging indicator will light up or flash and begin to charge the battery.

After successfully connecting the battery and photovoltaic array, finally close the fuse or breaker of the load, and then you can manually test whether the load can be normally turned on and off. For details, refer to information about load working modes and operations.

PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Warning risk of explosion icon Warning: when the controller is in normal charging state, disconnecting the battery will have some negative effect on the DC loads, and in extreme cases, the loads may get damaged.

Note that the battery’s fuse or breaker shall be installed as close to the controller as possible, and it’s recommended that the installation distance be not more than 150mm.

Note: 

  1. If no temperature sensor is connected to the controller, the battery temperature value will stay at a default of 25 °C. 
  2. If an inverter is deployed in the system, directly connect the inverter to the battery, and do not connect it to the controller’s load terminals.

Product Operation and Display

LED Indicators

PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - LED Indicators1—PV array indicatorCharging mode
2—BAT indicatorBattery status
3—LOAD indicatorLoad status
4—ERROR indicatorAbnormality indication
  • PV array indicator:PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - PV array indicator

No.Indicator stateCharging
state
1Steady onMPPT charging
2Slow flashing

(a cycle of 2s with on and off each lasting for 1s)

Boost charging
3Single flashing

(a cycle of 2s with on and off lasting respectively for 0.1s and 1.9s)

Floating charging
4ck flashing

(a cycle of 0.2s with on and off each lasting for 0.1s)

Equalizing charging
5Double flashing 

(a cycle of 2s with on for 0.1s, off for 0.1s, on again for 0.1s, and off again for 1.7s)

Current-limited charging
6OffNight time
  • BAT indicator:

    Indicator state Battery status
    Steady onNormal battery voltage
    Slow flashing

    (a cycle of 2s with on and of each lasting for 1s)

    Battery over-discharged
    Quick flashing

    (a cycle of 0.2s with on and off each lasting for 0.1s)

    Battery over-voltage

 

  • LOAD indicator:

    Indicator stateLoad state
    OffLoad turned off
    Quick flashing

    (a cycle of 0.2s with on and off each lasting for 0.1s)

    Load overloaded/ short-circuited
    Steady onLoad functioning normally

 

  • ERROR indicator:

    Indicator stateAbnormality
    indication
    OffSystem operating normally
    Steady onSystem malfunctioning

Key OperationsPowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Key Operations

▲ UpPage up; increase the parameter value in setting
▼ DownPage down; decrease the parameter value in setting
◄ReturnReturn to previous menu (exit without saving)
►SetEnter into sub-menu; set/ save Turn on/ off loads (in manual mode)

LCD Display and Operations

Menu Block DiagramPowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Menu Block DiagramPowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Menu Block Diagrama

Refer to “Usage of Navigation Keys” for operations including entering into and exiting each of the above menus, related  parameters setting, etc.

Main MenuPowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Main Menu
  • Definitions of “main menu” icons
    Icon or valueState DescriptionRemarks
    PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Night timeSteady onNight timeRelated to charging
    PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - day timeSteady onNight time
    PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - A dynamic arrow indicates charging isSteady onA dynamic arrow indicates charging is in process, while a static one indicates otherwise.
    PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Battery over-discharged“0 to 100%”Current battery capacityRelated to battery
    “0%” in slow flashingBattery over-discharged
    “100%” in quick flashingBattery over-voltage
    PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - A dynamic arrow indicates the load isSteady onA dynamic arrow indicates the load is switched on.Related to load
    PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - A static arrow indicates the load isSteady onA static arrow indicates the load is switched off.
    PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Overload or short-circuit protectionQuick flashingOverload or short-circuit protection
Real-Time Monitoring

(This menu is contained in and supplementary to information of the main menu)

In the “main menu”, tap “▶️ ” to enter into this menu; continue to tap “🔼,🔽 ” to switch between menus; or tap ” ◀️” to return to the “main menu”. (Refer to “8. Usage of Navigation Keys” for operation)

Menu levelPageDisplayed item/parameter Description Remarks
2nd-level menu1ChagState: IDLECharging state indications:
“IDLE”, no charging
“MPPT”, MPPT charging
“EQU”, equalizing charging”BST”, boost charging
“FLT”, floating charging
“LIMIT”, current-limited charging
BatVol: 11.6VBattery voltage
PvVol: 0VSolar panel voltage
ChagCrt: 0ACharging current
2LoadState: OFFLoad in “ON” or “OFF” state
LoadCrt: 0ALoad current
BatSoc: 100%Remaining battery capacity
DevTemp: 27℃Controller temperature
3ChagPower: 0WCharging power
LoadPower: 0WDischarging power
MinBatVo: 12.5VThe current day’s min. battery voltage
MaxBatVol: 13.0VThe current day’s max. battery voltage
4Fault: NULLController error codes:
“BAT-LDV”, over-discharge
“BAT-OVD”, over-voltage
“BAT-UVW”, under-voltage warning
“L-SHTCRT”, load short-circuit
“L-OVRCRT”, load over-current
“DEV-OVRTMP”, internal
over-temperature
“BAT-OVRTMP”, battery over-temperature
“PV-OVP”, solar panel overpower
“PV-SHTCRT’, solar panel short-circuit
“PV-OC-OVD”, solar panel open-circuit
over-voltage
“PV-MP-OVD”, solar panel max. working
point over-voltage
“PV-REV”, solar panel reverse connection
Not every controller has all of these error codes. For details, refer to the User Manual of the correspon ding controller.
Parameter Settings
  • Parameter settings list
Menu levelPageItem to setDisplayed item/ parameterParameter and setting rangeStep length
2nd-level menu1Battery system voltageBatSysVol:“12V”, 12V system
“24V”, 24V system
“36V”, 36V system
“48V”, 48V system “AUTO”, auto
recognition
Battery typeBatType:“SLD”, sealed lead-acid battery
“FLD”, open lead-acid battery
“GEL”, gel battery
“LI”, lithium battery
“USE”, user defined
±5
Nominal battery capacityCapacity:0 to 9999±1
Device addressAddress:1 to 60*n, ±1
2Over-voltage thresholdOverVolDsc:9.0 to 17.0V
Charging voltage limitChgLimtVol:9.0 to 17.0V
Equalizing charging voltageEquChgVol:9.0 to 17.0V
Boost charging voltageBstChgVol:9.0 to 17.0V
3Floating charging voltageFltChgVol:9.0 to 17.0V
Boost charging return voltageBstChgRev:9.0 to 17.0V
Over-discharge return voltageLowVolRev:9.0 to 17.0V
Under-voltage warning levelUndVolWrn:9.0 to 17.0V
4Over-discharge voltageLowVolDsc:9.0 to 17.0V
Over-discharge time delayLVD Delay:0 to 60s±1
Equalizing charging timeEqu-Time:0 to 300MIN±1
Boost charging timeBst-Time:0 to 300MIN±1
5Equalizing charging intervalEqu-Inv:0 to 30D (days)±1
Temperature compensationTemp-Com:-(3 to 5) mV/ °C/ 2V±1
Light control timeL-CON-T:0 to 60MIN±1
Light control voltageL-CON-V:5 to 11V*n, ±1
6LCD screen backlight timeBackLight-T:1 to 600s (ON indicates the screen is lit constantly)±1
Fault voice alarm;Voice Alarm:“ON”, voice alarm  enabled
“OFF”, voice alarm disabled
Clear historical data<ClrHistoryData>Select “YES” for execution
Reset to factory settings<RestoreDefault>Select “YES” for execution

Note:

  1. In this manual, “n” assigned with a value of 1, 2, 3 or 4 denotes a battery system of 12V, 24V, 36V or 48V accordingly.
  2. Before setting parameters, first refer to the User Manual of the corresponding controller. As some parameters are not settable, operation of setting these parameters on the display unit will be deemed as invalid or impossible by the controller.PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Before setting parameters

 

  1. This page gives a brief display of the system parameters already set;
  2. “AUTO””: automatic recognition of battery system voltage;
  3. “SLD”: the battery is of a sealed lead-acid type;
  4. “BST: 14.4V”: boost charging voltage is 14.4V*n;
  5. “LVD: 11.0V”: over-discharge voltage is 11.0V*n;
  6. In this “parameter settings” menu, tap ” ” to enter into the setting menu.
Controller Charging and Discharging Related Parameters Setting Descriptions

①All voltage values are to be set based on 12V system settings. For example, for a 24V system, if the over-discharge voltage is to be set to 22.0V, as n=24/12=2, the value needed in line with 12V system settings is 22.0V/2=11.0V, therefore the over-discharge voltage needs to be set to 11.0V

② Tap “🔼 ,🔽 ” to select the item to be set; then tap ” ▶️”, and the parameter or sign will flash; continue to tap “🔼 , 🔽” to adjust the value, and tap “▶️ ” again to confirm the setting. (For the setting ranges of related parameters, refer to “Parameter settings list”)

For parameters on the current menu, those highlighted are settable, while those underlined are not.

LCD Screen Backlight Time Setting
Displayed item/ parameterDescription
BackLight-T: ONThe LCD screen is lit constantly
BackLight-T: 20SThe LCD screen backlight time is 20s

Enter into the setting menu, tap ” 🔼, 🔽” to move to “BackLight-T:20S”, tap “▶️ “to enter into the setting mode, and continue to tap ” 🔼, 🔽” to modify the value (“ON” indicates the screen will be constantly lit, and a value within the range of “1-600″s defines the length of backlight time). Tap ” ▶️” to confirm the  modification, or tap ” ◀️” to cancel the modification.

“Clear Historical Data” and “Reset to Factory Settings”

“ClrHistoryData” –> “YES”, clear historical data
“RestoreDefault”–> “YES”, reset to factory settings

Tap “▶️ ” to enter into the submenu, and a “NO” and YES” selection menu will pop up. Use “🔼 ,🔽 ” to select “YES“, then tap “▶️ ” again, and “YES” will flash a few times. If “NO” is selected, tap “▶️ ” to directly return to the previous level.

Load ModePowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Load Mode

① If the characters displayed on top of “<Mode>” are “ON“, it indicates that the load is switched on, and “OFF” indicates the load is switched off.

② Tap “▶️ ” to enter into the load setting mode, and right below the “<Mode>” , the mode characters or digits will begin to flash. Use “🔼 , 🔽” to select any one from the load modes listed in the following table, and tap “▶️ ” again to complete the load mode setting.

③ Press and hold “▶️ ” in any menu but not the setting mode: if the current load mode is “manual mode”, pressing and holding the key will switch on/ off the load; if the current load mode is not “manual mode”, pressing and holding the key will cause the display to skip to the load mode setting interface and a reminder will pop up telling the user in this mode, pressing and holding the key will not switch on/ off the load.

④ This parameter is invalid for controllers without loads.

Load modeMode charactersDescription
Sole light control modeLight+OnThe solar panel voltage is lower than the light control on voltage, and after a preset time delay , the controller will switch on the load;

The solar panel voltage is higher than the light control off voltage, and after a preset time delay , the controller will switch off the load.

Light control + time control mode 1 to 14HLight+01H

Light+14H
The solar panel voltage is lower than the light control on voltage, and after a time delay, the controller will switch on the load. From this point on, the load will work for a preset period of time (1 to 14 hours) before being switched off.
Manual modeManualIn this mode, whether it’s day or night, users can press and hold the “▶️” key to switch on or off the load; this mode is often used in some special occasions or during commissioning.
Debugging modeDebugAs long as the solar panel voltage is lower than the light control on voltage, the controller will immediately switch on the load;

As soon as the solar panel voltage gets higher than the light control off voltage, the controller will immediately switch off the load.

This mode is usually used during system installation and commissioning.

Normal mode onNormal OnThis mode is suitable for applications requiring 24-hour operation, and after  being switched on, the load keeps outputting in this mode.
Statistic DataPowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Statistic Data

The data includes total charging amp-hrs, total discharging amp-hrs, total power consumption, numbers of operating days, over-discharges and full-charges.

Menu levelPageDisplayed item/ parameterDescription
2nd-level
menu
1C-chg: 0AHTotal charging amp-hrs
C-lo: 0AHTotal discharging amp-hrs
E-chg: 0KWHTotal discharging amp-hrs
E-lod: 0KWHTotal power consumption
2Rundays: 10DTotal number of operating days
LVD-Count: 0Total number of over-discharges
FUL-Count: 0Total number of full-charges
Historical Data of the Current DayPowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Historical Data of the Current Day

The data includes the current day’s min. battery voltage, the current day’s max. battery voltage, the current day’s max.
charging current, the current day’s max. discharging current, the current day’s max. charging power, the current day’s max. discharging power, the current day’s charging amp-hrs, the current day’s discharging amp-hrs, the current day’s total power generation and the current day’s total power consumption)

Menu levelPageDisplayed item/ parameterDescription
2nd-level menu1<History Data>

xxxx Days Ago

Xxxx: select the historical data of day xxxx (counting backwards)
0000: the current day
0001: yesterday
0002: the day before yesterday
3rd-level
menu
1MinBatVol: 11.5VMin. battery voltage
MaxBatVol: 11.6VMax. battery voltage
MaxChgVol: 0AMax. charging current
MaxLodVol: 0AMax. discharging current
2MaxChgPow:
0W
Max. charging power
MaxLodPow:
0W
Max. discharging power
C-D-Chg: 0AHCharging amp-hrs
C-D-Lod: 0AHDischarging amp-hrs
3E-D-Chg: 0kWDischarging amp-hrs
E-D-Lod: 0kWhPower consumption
Device InformationPowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Device Information
Menu levePageDisplayed item/parameter Description
2nd-level menu1Model: 4845Product model
HW-ver: 00.02.07Hardware version
SW-ver: 00.00.04Software version
Serial: 160300032Product serial number
Bluetooth Connection StatusPowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Bluetooth Connection Status
  1. When “Disconnect” is displayed on the screen, it indicates no Bluetooth device is currently connected.
  2. When “Connected” is displayed, it indicates some Bluetooth device has been connected.
  3. Bluetooth functions and this menu are only available to the “RM-5B” display unit, and not the “RM-5” unit.
  4. The App is only compatible with Android phones with an OS version of 4.3 or above and iPhones.

Product Protection Function and System Maintenance

Protection Functions

  • Waterproof
    Waterproof level: IP32
  • Input power limiting protection
    When the solar panel power exceeds the rated power, the controller will limit the charging power under the rated power so as to prevent excessively large currents from damaging the controller and enter into current-limited charging.
  • Battery reverse connection protection
    If the battery is reversely connected, the system will simply not operate so as to protect the controller from being burned.
  • Photovoltaic input side too high voltage protection
    If the voltage on the photovoltaic array input side is too high, the controller will automatically cut off photovoltaic input.
  • Photovoltaic input side short-circuit protection
    If the photovoltaic input side gets short-circuited, the controller will halt charging, and when the short circuit issue gets cleared, charging will automatically resume.
  • Photovoltaic input reverse-connection protection
    When the photovoltaic array is reversely connected, the controller will not break down, and when the connection problem gets solved, normal operation will resume.
  • Load overpower protection
    When the load power exceeds the rated value, the load will cut off output after a time delay.
  • Load short-circuit protection
    When the load is short-circuited, the controller can implement protection in a quick and timely manner, and will try to switch on the load again after a time delay. This protection can be carried out up to 5 times a day. Users can also manually address the short circuit problem when finding the load is short-circuited via the abnormality codes on the system data analysis page.
  • Reverse charging protection at night
    This protection function can effectively prevent the battery from discharging through the solar panel at night.
  • TVS lighting protection.
  • Over-temperature protection
    When the controller temperature exceeds the set value, it will decrease the charging power or halt charging. See the following diagram:

    PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Fig. 4-1
    Fig. 4-1

When the ambient temperature rises higher than the set value, the controller will stop charging and discharging.

System Maintenance

  • In order to keep the controller’s performance at its optimum level, we recommend that the following items be checked twice a year.
  • Make sure the airflow around the controller is not blocked and clear away any dirt or debris on the radiator.
  • Check if any exposed wire gets its insulation undermined due to exposure to sunlight, friction with other adjacent objects, dry rot, damage by insects or rodents, etc. Repair or replace those affected when necessary.
  • Verify that indicators function in line with device operations. Note any faults or displayed errors and take corrective measures if necessary.
  • Check all wiring terminals for any sign of corrosion, insulation damage, overheat, combustion/ discoloration, and tighten the terminal screws firmly.
  • Check if there are any dirt, nesting insects or corrosion, and clean as required.
  • If the lightening arrester has lost its efficacy, replace it with a new one timely to prevent the controller and even other devices owned by the user from being damaged by lightening.

PowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Warning risk of explosion icon Warning: risk of electric shock! Before carrying out the above checkings or operations, always make sure all power supplies of the controller have been cut off!

Product Specification Parameters

Electric Parameters

ParameterValue
ModelML4860
System voltage 12V/24V/36V/48V Auto
No-load loss0.7 W to 1.2W
Battery voltage9V to 70V
Max. solar input voltage 150V (25°C), 145V (-25°C)
Max. power point voltage rangeBattery voltage +2V to 120V
Rated charging current60A
Rated load current20A
Max. capacitive load capacity10000uF
Max. photovoltaic system input power800W/12V; 1600W/24V; 2400W/36V; 3200W/48V
Conversion efficiency≤ 98%
MPPT tracking efficiency> 99%
Temperature compensation factor-3mv/°C/2V (default)
Operating temperature-35°C to +45°C
Waterproof level IP32
Weight 3.6kg
Communication methodRS232 RS485
Altitude≤ 3000m
Product dimensions285*205*93mm

Battery Type Default Parameters

Parameters cross-reference table for different types of batteries
Voltage to set Battery typeSealed lead-acid battery (not settable)Gel lead-acid battery (not settable)Open lead-acid battery (not
settable)
User
(self-customized)
Over-voltage cut-off voltage16.0V16.0V16.0V9 to 17V
Equalizing voltag14.6V——14.8V9 to 17V
Boost voltage14.4V14.2V14.6V9 to 17V
Floating charging voltage13.8V13.8V13.8V9 to 17V
Boost recovery voltage13.2V13.2V13.2V9 to 17V
Low-voltage cut-off recovery voltage12.6V12.6V12.6V9 to 17V
Under-voltage warning recovery voltage12.0V12.0V12.0V9 to 17V
Under-voltage warning voltage12.0V12.0V12.0V9 to 17V
Low-voltage cut-off voltage11.1V11.1V11.1V9 to 17V
Discharging limit voltage10.6V10.6V10.6V9 to 17V
Over-discharge time delay5s5s5s1 to 30s
Equalizing charging
duration
120 minutes——120 minutes0 to 600 minutes
Equalizing charging interval30 days0 days30 days0 to 250 days (0 means the
equalizing charging function
is disabled)
Boost charging duration120 minutes120 minutes120 minutes10 to 600 minutes

When selecting User, the battery type is to be self-customized, and in this case, the default system voltage parameters are consistent with those of the sealed lead-acid battery. When modifying battery charging and discharging parameters, the following rule must be followed:

  • Over-voltage cut-off voltage> Charging limit voltage ≥ Equalizing voltage ≥ Boost voltage ≥ Floating charging voltage > Boost recovery voltage;
  • Over-voltage cut-off voltage > Over-voltage cut-off recovery voltage;
  • Low-voltage cut-off recovery voltage > Low-voltage cut-off voltage ≥ Discharging limit voltage;
  • Under-voltage warning recovery voltage > Under-voltage warning voltage ≥ Discharging limit voltage;
  • Boost recovery voltage > Low-voltage cut-off recovery voltage

Conversion Efficiency Curve

12V System Conversion EfficiencyPowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - 12V System Conversion Efficiency

24V System Conversion EfficiencyPowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - 24V System Conversion Efficiency

48V System Conversion EfficiencyPowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - 48V System Conversion Efficiency

Product DimensionsPowMr 60A 12V 24V 36V 48V Auto MPPT Solar Charge Controller User Manual - Product Dimensions

Download Manual PDF

PowMr 60A 12V/24V/36V/48V Auto MPPT Solar Charge
Controller User Manual PDF Download

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