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    Picture of 40A PWM Solar Charge Controller, 12V/24V/48V
    Picture of 40A PWM Solar Charge Controller, 12V/24V/48V
    Picture of 40A PWM Solar Charge Controller, 12V/24V/48V
    Picture of 40A PWM Solar Charge Controller, 12V/24V/48V
    Picture of 40A PWM Solar Charge Controller, 12V/24V/48V

    40A PWM Solar Charge Controller, 12V/24V/48V

    1 review(s) | Add your review
    SKU: PH-PWM-40
    $108.86
    ● 40A PWM solar charge controller for sale. Quality assurance. Industrial-grade main chip, intelligent control. ● Wide voltage 12V/24V/48V automatic recognition, suitable for lead-acid, lithium ternary, lithium iron phosphate batteries. ● Three-stage charge management, multiple circuit protection, APP real-time monitoring settings. ● Suitable for multiple scenes: houses, yacht ships, outdoor caravans, solar billboards, solar power systems, solar street lights.
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    🚚 Free shipping
    ⏱️ Delivery: 6-12 days
    🔙 30-day Returns
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    Overview

    PWM solar charge controller with a rated charge and discharge current of 40A, and a maximum PV voltage of 25V for 12V systems, 50V for 24V systems, and 100V for 48V systems. With multiple circuit protection: built-in near-charging protection, short-circuit protection, open-circuit protection, reverse connection protection and other multiple protections are self-recovery, do not damage the controller. Powering a remote cabin, a small home, or a larger off-grid system.

    30a pwm solar charge controller feature

    Feature

    • Core Technology: Wide voltage 12V/24V/48V Automatic identification for lead-acid, lithium ternary, lithium iron phosphate batteries
    • Industrial-grade Main Chip: Complete 3-stage charging management, built-in circuit protection, WIFI APP control. Intelligent control, LCD colour screen display, multiple protection and safer.
    • APP Monitor Setting: check and set the working status of the machine at any time.
    • Adequate Current Controller: Real current, not false labeling.
     

    Details

    1. Large LCD Display: Clearly shows controller data and working status
    2. Dual USB Ports: Convenient for connecting devices for charging or data transmission
    3. Heat Sink Back Plate: Effective heat dissipation to enhance the controller's ability to work stably for a long time
    4. Heat Sink Holes: Accelerate heat dissipation and protect the controller circuitry from overheating
    30a pwm solar charge controller detail
     

     

    40A PWM Solar Charge Controller Keypad Connection

    40A PWM solar charge controller keypad connection

    1 2 3 4
    LCD Display Menu Button Up Page Solar Access Indicator
    5 6 7 8
    Battery Indicator Load and WIFI Indicators Function Confirmation and Load Switch Key Next Page


    40A PWM Solar Charge Controller Size (unit: mm)

    30A pwm solar controller size

     

    40A PWM Solar Charge Controller Install Diagram

    20A pwm solar charge controller install diagram

    Installation Note 

    1. Connect the positive and negative terminals of the battery to the controller as shown in the diagram, the controller will automatically detect the battery voltage.
    2. Connect the positive and negative terminals of the load to the PWM solar controller as shown in the diagram, and be careful not to connect the reverse.
    3. Connect and release the solar panel to the controller according to the diagram.
    Specs
    Automatic Voltage Recognition 12V/24V/48V/Systems
    Battery Type Li-ion ternary battery / lithium iron phosphate battery / lead-acid battery (optional)
    Setting the Battery Type Li-ion ternary battery (If you need other battery parameters please check the PDF file)
    Rated Charge Current 40A
    Rated Discharge Current 40A
    Maximum PV Voltage 12V system<25V/24V system<50V/48V system<100V
    USB Output 5V 2A MAX
    Standby Current 12V<80ma; 24V<45ma; 48V<30ma
    System Voltage 12V System 3 Strings Default 12.6V (Irreconcilable)
    Default 9V (Adjustable 9~10.5V)
    Default 10.5V (Adjustable 10.5~11.7V)
    System Voltage 24V System 7 Strings Default 29.4V (Irreconcilable)
    Default 21V (Adjustable 21~24.5V)
    Default 24.5V (Adjustable 24.5~27.3V)
    System Voltage 48V System 13 Strings Default 54.6V (Irreconcilable)
    Default 39V (Adjustable 39~45.4V)
    Default 45.4V (Adjustable 45.4~50.7V)
    Ambient Temperature -20℃~+50℃
    Dimension 135*170*70mm
    Net weight 0.65kg

    PDF computing40A PWM Solar Charge Controller User Manual


    PWM Solar Charge Controller Description

     

    pwm solar controller led and key description

    Indicator lamps

    Solar Access LED Indicator light is on when solar energy is detected and no solar energy is detected.
    Battery LED The indicator light is on after connecting the battery, the indicator light will flash with 0.5 seconds switching frequency when the load is protected by long time voltage, and the indicator light will light up normally after the voltage rises to the restored value.
    Load and WIFI LEDs Indicator light is on when the load is turned on, off when the load is turned off, after turning on the WIFI, the indicator light will blink 5 times at a frequency of 0.5 seconds, then return to the load indication state for 10 seconds, and then return to the WIFI indication state again.


    Button or Key (on a device)

    Menu Key Tap the button to cycle through the menus
    Page Up After entering the menu setting, turn up to set the function parameters.
    Page Down Flip down to set the function parameters after entering the menu settings.
    Function Confirm and Load On/Off Keys Confirm to enter and exit the menu setting items, load switch
    Application
    Off grid solar charge controller

    Off Grid Solar Charge Controller

    PWM solar controller for solar systems

    Solar Controller for Solar Systems

    PWM solar charge controller for outdoor caravan

    Outdoor Caravan

    PWM solar controller for solar street light

    Solar Street Light

    FAQ

    Q1. What do the error codes on the controller display mean?

    Error codes indicate various system faults such as over-temperature, short circuit, or overload. Refer to the user manual for specific error code meanings and follow the recommended actions. Ensure proper ventilation around the controller and check for any short circuits or overload conditions.

    Q2. What should I do if the LCD display is blank or malfunctioning?

    Inspect and secure all connections to the display, ensure the battery voltage is within the operational range of the controller, and contact customer support for repair or replacement if the display is damaged.

    1 review(s)
    5.0 1
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    Rory | 9/14/2026 1:04 AM
    Solid 40A PWM Solar Charge Controller with WiFi App
    I’ve been using this 40A PWM solar charge controller for my off-grid cabin, and it’s been working well. The automatic 12/24/48V detection made setup easy, and it supports both LiFePO4 and lead-acid batteries. The WiFi app is convenient for checking the system remotely, while the cooling design helps keep it running steadily. Overall, it feels well built for the price.
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