1. Introduction
The PowMr MPPT Solar Charge Controller is an intelligent, efficient, and energy-saving device designed for solar lighting systems. It features an MPPT (Maximum Power Point Tracking) charging function to automatically track the maximum power point of solar panels, resulting in 10%-30% higher charging efficiency compared to ordinary controllers. The controller also boasts standby energy-saving capabilities, consuming only 10mA-15mA in standby mode, which is over 30% less energy than conventional controllers.
Note: This is a high-quality compatible MPPT + PWM Solar Controller, not a 100% True MPPT controller. The charging mode is PWM.
Key Features:
- LCD screen display for clear information.
- Easy operation interface.
- MPPT+PWM charging mode.
- User-resettable parameters.
- Battery reverse discharge protection.
- Battery undervoltage protection.
- Overload and short-circuit protection.
- Automatic temperature compensation function.
- Capable of simultaneous charging and discharging, maintaining the battery in a full state.
2. Product Overview and Components
The PowMr Solar Charge Controller is designed for robust performance and ease of use. Below are various views of the product and its key components.
Figure 2.1: Front view of the MPPT T40 Solar Charge Controller.
Figure 2.2: Angled view of the controller.
Figure 2.3: Rear view showing the heatsink.
Figure 2.4: Side view with terminal connections.
Figure 2.5: Detailed view of LCD, buttons, and terminals.
Figure 2.6: Top view with USB and thermoscope ports.
3. Specifications
The following tables detail the technical specifications and parameters for the PowMr MPPT Solar Charge Controller models T20, T40, and T40-S.
General Parameters:
| Parameter | T20 | T40 | T40-S |
|---|---|---|---|
| Maximum power current | 20A | 40A | 40A |
| Installation Lin mm2 | 8mm2 | 12mm2 | 12mm2 |
| Installation Line (AWG) | 8(AWG) | 6(AWG) | 6(AWG) |
| Weight | 300g | 480 | 480 |
| Dimensions | 143×89×46 mm | 187×97×61 mm | 187×97×61 mm |
| System load loss | ≤13mA | ||
| Loop Buck | ≤100mV | ||
Detailed Specifications:
| Specification | |
|---|---|
| Battery float voltage | 13.8V (12V system) / 27.6V (24V system) |
| Battery under voltage protection | 10.6V (12V system) / 21.2V (24V system) |
| Battery (under voltage) recovery voltage | 12.6V (12V system) / 25.2V (24V system) |
| Charge mode | MPPT+PWM MODE |
| Operating Temperature | -10~60°C |
| Storage Temperature | -30~70°C |
| Humidity requirements | ≤90%, No condensation |
| Temperature compensation | -4mV/Cell/°C |
| Temperature Probe (built components) | NTC 100K thermistors |
| Maximum open circuit voltage of the solar panel | 18V-24V (12V system) / 36V-48V (24V system) |
| Solar panels maximum open circuit voltage (V) | ≤48V |
12V System Standard Configuration (Cases):
| Parameter | T20 | T40 |
|---|---|---|
| The peak voltage of the solar cell panel | 18V-25V | 18V-25V |
| Peak power of solar cell panel | 100W-260W | ≤500W |
| Model | T20 | T40 |
| Battery standard voltage | 12V | 12V |
| Battery capacity | ≥200AH | ≥400AH |
| Installation Lin mm2 | 8mm2 | 12mm2 |
| Installation Line (AWG) | 8(AWG) | 6(AWG) |
Figure 3.1: Physical dimensions of the MPPT T40 controller.
4. Setup and Wiring
Proper installation and wiring are crucial for the safe and efficient operation of your solar charge controller. Always ensure all connections are secure before powering on the system.
Wiring Diagram:
Figure 4.1: General wiring diagram for a solar lighting system with the controller.
Terminal Definitions:
The controller features clearly labeled terminals for solar panels, battery, and load. Refer to the diagram below for detailed port identification.
Figure 4.2: Detailed view of controller ports and terminals.
Module Interface Definition:
The data collector module uses a 4-pin connector. The pin definitions are as follows:
| Pin | Description | Network Name | Type | Notes |
|---|---|---|---|---|
| 1 | Power | VCC | POWER | External Power Supply |
| 2 | Data Communication | A | I/O | RS485 A Line |
| 3 | Data Communication | B | I/O | RS485 B Line |
| 4 | Power Ground | GND | GND | GND |
For more detailed wiring instructions and diagrams, please refer to the official user manual PDF: PowMr Solar Charge Controller User Manual (PDF)
5. Operation
The controller features an intuitive LCD display and simple button controls for monitoring and adjusting settings.
LCD Display and Buttons:
Figure 5.1: LCD display and control buttons.
Basic Navigation:
Use the buttons below the LCD to navigate through the display and adjust parameters:
- The left-most button (with arrows) is typically used to cycle through different display screens or menus.
- The '+' and '-' buttons are used to increase or decrease values when setting parameters.
- The right-most button (light bulb icon) is for ON/OFF/RESET functions. A short press might toggle the load, while a long press (5 seconds) can initiate a reset.
Video 5.1: Demonstration of connecting the controller to a battery and navigating the LCD display.
6. LED Indicator Status
After connecting the data collector, check the status of the NET, COM, and READY indicator lights to understand the device's operational state. Each light has a specific meaning:
| Indicator Label | Indicator Meaning | Status Description |
|---|---|---|
| NET | Collector and Router Communication Status |
|
| COM | Collector and Inverter Communication Status |
|
| READY | Collector Working Status |
|
7. Troubleshooting
If the data collector experiences abnormal platform data, refer to the table below for simple troubleshooting steps based on the LED indicator status. If the issue persists or the LED status is not listed, please contact customer support.
| NET LED | COM LED | READY LED | Problem Description | Cause of Problem | Solution |
|---|---|---|---|---|---|
| Any State | Off | Slow Flash | Collector and Inverter Communication Abnormal |
|
|
| Off | Solid On | Slow Flash | Collector and Router Communication Abnormal |
|
|
| Slow Flash | Solid On | Slow Flash | Router connection normal, but remote server connection abnormal |
|
|
| Off | Off | Off | Power Supply Abnormal |
|
|
| Fast Flash | Any State | Any State | Bluetooth Network Configuration | Normal |
|
| Any State | Any State | Fast Flash | Restore Factory Settings | Normal |
|
8. Maintenance
To ensure the longevity and optimal performance of your PowMr Solar Charge Controller, regular maintenance is recommended:
- Cleaning: Periodically clean the exterior of the controller with a dry, soft cloth. Do not use harsh chemicals or abrasive cleaners. Ensure ventilation openings are free from dust and debris.
- Connections: Regularly check all wiring connections (solar panel, battery, load) to ensure they are tight and free from corrosion. Loose connections can lead to power loss or damage.
- Environment: Ensure the controller is installed in a well-ventilated area, away from direct sunlight, moisture, and extreme temperatures, within the specified operating and storage temperature ranges.
- Firmware Updates: Check the manufacturer's website periodically for any available firmware updates.
9. Accessories
The following items are typically included with your PowMr Solar Charge Controller:
| No. | Name | Quantity | Notes |
|---|---|---|---|
| 1 | Data Collector (WiFi) | 1 | --- |
| 2 | LSW-Custom Quick Mount Guide (with fixed bracket and adapter cable) | 1 | 17000061 |
| 3 | Fixed Bracket Expansion Screws | 2 | --- |
| 4 | Fifth Generation Collector Fixed Bracket | 1 | --- |
| 5 | LSW-5 Custom Adapter Cable | 1 | --- |
Adapter Cable:
Figure 9.1: Adapter cable diagram.
10. Warranty and Support
For warranty information, technical support, or any inquiries regarding your PowMr MPPT Solar Charge Controller, please contact the manufacturer or your authorized dealer. Keep your purchase receipt as proof of purchase for warranty claims.
