1. Introduction
This manual provides essential information for the safe and efficient operation of your PowMr 100A MPPT Solar Charge Controller. This advanced Maximum Power Point Tracking (MPPT) controller is designed to optimize power harvesting from your solar panels and efficiently charge 12V, 24V, or 48V battery systems. It features high tracking efficiency (98%) and conversion efficiency (99%), ensuring maximum energy utilization and prolonging battery service life.
Figure 1: PowMr 100A MPPT Solar Charge Controller
2. Safety Instructions
- Read all instructions carefully before installation and operation.
- Ensure all wiring is correctly polarized and securely connected to prevent damage to the controller or other components.
- Always disconnect the battery first, then the solar panel, before performing any maintenance or disconnection. Reconnect in reverse order: solar panel, then battery.
- Install the controller in a well-ventilated area, away from flammable materials and direct sunlight.
- Do not disassemble or attempt to repair the controller yourself. Contact qualified personnel for service.
- Wear appropriate personal protective equipment (PPE) during installation, including eye protection and insulated gloves.
- Ensure the system voltage (12V, 24V, or 48V) matches the battery bank configuration. The controller automatically identifies system voltage.
3. Package Contents
Upon opening the package, please verify that all items are present and undamaged:
- 1x PowMr 100A MPPT Solar Charge Controller
- 1x Battery Temperature Sensor Cable
- Mounting Screws and Nuts
- User Manual (this document)
Video 1: Unboxing and overview of the PowMr 100A MPPT Solar Charge Controller and included accessories.
4. Product Overview
The PowMr 100A MPPT Solar Charge Controller features a robust design with an intuitive LCD display and high-quality terminals for reliable operation.
4.1. Front Panel and Display
Figure 2: Front view with LCD display and rear panel details.
The LCD display provides real-time data on the system's operating status, including:
- PV: Solar panel voltage and current.
- BATT: Battery voltage and charging current.
- LOAD: Load voltage and current.
- Evening/Interval/Dawn: Load working modes and settings.
- PV OFF/LOAD OFF/LOAD ON: Voltage thresholds for various operations.
4.2. Connection Terminals
Figure 3: Bottom connection terminals.
The controller features clearly labeled terminals for:
- SOLAR: Input from solar panels.
- BATTERY: Connection to the battery bank.
- LOAD: Output for DC loads.
- TEMP SENSOR: Port for the included battery temperature sensor.
- COM: Communication port (RS485) for optional remote meter.
- USB 5V2A: USB charging ports.
5. Setup and Installation
Follow these steps for safe and correct installation of your MPPT solar charge controller. Ensure all connections are secure and correctly polarized.
5.1. Mounting the Controller
- Choose a dry, well-ventilated location, protected from direct sunlight, high temperatures, and moisture.
- Mount the controller vertically on a wall or suitable surface using the provided screws, ensuring adequate clearance for heat dissipation.
Figure 4: Controller back view with mounting points.
5.2. Wiring Diagram and Connection Sequence
IMPORTANT: Always connect the battery first, then the solar panels, and finally the load. Disconnect in reverse order.
Figure 5: General wiring overview.
- Connect the Battery: Connect the positive and negative terminals of your battery bank to the "BATTERY" terminals on the controller. Ensure correct polarity. The controller will automatically detect the battery voltage (12V, 24V, or 48V).
- Connect the Solar Panels: Connect the positive and negative output from your solar panel array to the "SOLAR" terminals on the controller. Ensure correct polarity. Refer to the table below for appropriate PV array voltage and power for your system.
- Connect the Load: Connect your DC loads to the "LOAD" terminals on the controller. Ensure correct polarity.
- Connect Temperature Sensor: Plug the battery temperature sensor cable into the "TEMP SENSOR" port and attach the sensor to the battery. This ensures accurate temperature compensation for charging.
- Optional Remote Meter: If using a remote meter, connect it to the "COM" (RS485) port.
5.3. Solar Panel Configuration Guidelines
It is crucial to configure your solar panel array within the specified voltage and power ranges for your battery system. Exceeding these limits can damage the controller.
Figure 6: Solar panel configuration for different battery systems.
| Battery System | VOC of PV (Open Circuit Voltage) | Max. PV Input Power |
|---|---|---|
| 12V | 18-72V | 60W-1300W |
| 24V | 36-108V | 60W-2500W |
| 48V | 72-144V | 60W-5000W |
Note: The absolute maximum open circuit voltage for solar panels is ≤96V for 12V systems, ≤144V for 24V systems, and ≤144V for 48V systems. Please ensure your solar array's VOC does not exceed these maximums.
6. Operating the Controller
Once installed, the controller will automatically begin operating. The LCD display provides all necessary information and allows for configuration of load working modes.
6.1. MPPT Charging Mode
The controller utilizes a three-stage MPPT charging mode:
- Constant Current: Rapid charging phase where the controller delivers maximum current to the battery.
- Constant Voltage: Once the battery reaches a certain voltage, the controller maintains this voltage while reducing the current.
- Floating Charge: After the battery is fully charged, the controller maintains a lower voltage to keep the battery topped off and prevent overcharging.
This process ensures rapid, efficient, and safe battery charging, prolonging battery service life.
6.2. Load Working Modes
The controller supports multiple load working modes, which can be combined or set individually based on your needs. These modes control when the connected DC loads are powered on or off. The specific settings for these modes can be adjusted via the controller's LCD interface or an optional remote meter.
- Evening Mode: Appliances will be ON between dusk and dawn.
- Interval Mode: Allows setting a specific working time after dusk (e.g., 1-23 hours).
- Dawn Mode: Allows appliances to turn ON again for a set duration before dawn (e.g., 1-23 hours).
7. Specifications
| Brand Name | PowMr |
| Model Number | POW-K48100A |
| Is Smart Device | Yes |
| Application | Thermal Controller, Charger Controller, Water Heater Controller, Voltage Controller, Collector Controller, Lighting Controller, Solar System Controller |
| Maximum Charging Current | 100A |
| Load Output Current | 40A |
| Battery Voltage | 12V/24V/48V Auto-identifying |
| Battery Type | Flooded, Gel, Lead-acid, AGM Batteries, User Mode |
| Charging Type | MPPT Charging (Constant Current, Constant Voltage, Floating Charge) |
| Max. PV Input Voltage (VOC) | 12V system: 18-96V; 24V system: 36-144V; 48V system: 72-144V |
| Max. PV Input Power | 12V system: 1300W; 24V system: 2500W; 48V system: 5000W |
| System Load Loss | ≤13mA |
| Loop Buck | ≤100mV |
| Operating Temperature | -10℃ to 60℃ |
| Storage Temperature | -30℃ to 70℃ |
| Humidity Requirements | ≤90％, No condensation |
| Temperature Compensation | -4mV/Cell/℃ |
| Installation Line (AWG) | 4-6# AWG cable |
| Controller Dimensions | 400 x 220 x 120 mm |
| Origin | Mainland China |
| Certification | CE, FCC, RoHS |
7.1. Heat Dissipation Features
The controller is designed with efficient heat dissipation in mind to ensure stable and safe operation. It incorporates heat dissipation ventilation, dual intelligent cooling fans, and cooling teeth to effectively manage internal temperatures, ensuring reliable performance and extended lifespan. For a visual demonstration of these features, please refer to Video 1 at the 0:31 mark.
8. Maintenance
- Regularly inspect all wiring connections for tightness and corrosion.
- Keep the controller clean and free from dust and debris to ensure proper ventilation.
- Check the battery terminals for corrosion and clean if necessary.
- Monitor the LCD display for any error codes or unusual readings.
9. Troubleshooting
If you encounter issues with your controller, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No display/Controller not powering on | Loose battery connection, discharged battery, reversed polarity. | Check battery connections, ensure battery has sufficient charge, verify polarity. |
| No charging from solar panels | Solar panels disconnected, insufficient sunlight, PV voltage too low/high, reversed polarity. | Check solar panel connections, ensure adequate sunlight, verify PV voltage is within range (Table 1), check polarity. |
| Load not working | Load disconnected, load overcurrent, load mode settings. | Check load connections, ensure load current is within 40A, review load working mode settings. |
| Battery not fully charging | Undersized solar array, faulty battery, incorrect battery type setting. | Ensure PV input power meets requirements, test battery health, verify battery type setting on controller. |
10. User Tips
- For optimal performance, ensure the battery temperature sensor is properly installed and making good contact with the battery. This allows for accurate temperature compensation during charging.
- Consider using the optional remote meter for easier monitoring and adjustment of settings, especially if the controller is installed in a hard-to-reach location.
- Always double-check the polarity of all connections before powering on the system to prevent damage.
11. Warranty and Support
This product comes with a standard manufacturer's warranty. For warranty claims, technical support, or service inquiries, please contact your retailer or the manufacturer directly. Please have your model number (POW-K48100A) and purchase information ready.
