1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Temank MPPT Solar Charge Controller 25A. This advanced controller is designed to maximize power harvesting from your solar panels and efficiently charge various battery types, including lead-acid and lithium batteries.
Figure 1: Temank MPPT Solar Charge Controller 25A
This image displays the front view of the Temank MPPT Solar Charge Controller, highlighting its compact design and user interface with an LCD screen and control buttons.
2. Product Features
- Advanced MPPT Technology: Features up to 98% tracking efficiency and 97% peak conversion efficiency for maximized solar panel output.
- Wide Battery Compatibility: Compatible with 12V and 24V lead-acid (Sealed, Gel, Flooded) and lithium (LiFePO4, Lithium-Ion) batteries.
- Comprehensive Protection: Equipped with protections against short circuits, overcurrent, reverse polarity, overvoltage, over-discharge, and over-temperature.
- User-Friendly Interface: Clear LCD screen with four buttons for easy operation and monitoring of working state and process.
- Efficient Charging: Utilizes a 3-stage battery charging algorithm for rapid, efficient, and safe charging.
- Durable Construction: Die-cast aluminum construction provides excellent heat dissipation.
Figure 2: Efficiency and Compatibility Overview
This image illustrates the high tracking and peak conversion efficiency of the MPPT solar charge controller, along with its compatibility with 12V/24V battery systems and available current ratings (25A, 35A, 45A).
3. Safety Information
Please read all safety instructions carefully before installation and operation. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Ensure all connections are tight and correct to prevent loose connections that can cause excessive heat.
- Always connect the battery first, then the solar panel, and finally the load. Disconnect in the reverse order.
- Install the controller in a well-ventilated area, away from flammable materials.
- Do not attempt to disassemble or repair the controller yourself. Contact qualified personnel for service.
- The controller has negative grounding design for enhanced safety.
- Avoid charging lithium batteries below 0°C (32°F) to prevent damage.
Figure 3: Built-in Protection Features
This image highlights the nine built-in electronic protections of the PowMr Solar controller, including PV overcurrent, PV short circuit, PV reverse polarity, battery reverse polarity, battery overvoltage, battery over-discharge, lithium battery low temperature, load overcurrent protection, and overtemperature protection.
4. Setup and Installation
4.1 Wiring Diagram
Follow the wiring sequence carefully to ensure proper and safe operation of the solar charge controller. Connect the system in the order of battery, then load, then PV array. Disconnect in the reverse order.
Figure 4: Schematic Wiring Diagram
This diagram illustrates the correct connection sequence for the solar charge controller, showing the battery, inverter, light load, and solar panels. It emphasizes connecting the battery first, then the load, and finally the PV array, with disconnection in reverse order.
4.2 Step-by-Step Connection Guide
For a visual guide on connecting your solar charge controller, please watch the official wiring guide video below.
Video 1: Wiring Guide for POW-M25/M35/M45-PRO
This video provides a step-by-step visual demonstration of how to correctly wire the Temank MPPT Solar Charge Controller, including connecting the battery, solar panels, and DC load, and starting up the controller.
- Prepare for Installation: Ensure all power sources are disconnected. Remove the port cover from the bottom of the controller.
- Connect the Battery: Connect the battery cables to the battery terminals on the controller. Ensure correct polarity (red for positive, blue/black for negative). Tighten the screws securely.
- Connect the PV Array: Connect the solar panel cables to the PV array terminals on the controller. Ensure correct polarity. Tighten the screws securely.
- Connect the DC Load (Optional): If using a DC load directly from the controller, connect its cables to the DC load terminals. Ensure correct polarity. Tighten the screws securely.
- Reassemble: Once all connections are secure, reassemble the port cover.
- Start Up: Activate the circuit breaker for the battery, then the solar panels. The controller display should power on.
4.3 Battery Compatibility
The controller is compatible with various 12V and 24V battery types. You can select the battery type in the settings.
Figure 5: Multiple Battery Type Support
This image demonstrates the solar charge controller's compatibility with various 12V/24V battery types, including AGM, GEL, FLD (Flooded), LI (Lithium), and SLA (Sealed Lead-Acid). It also shows the process for entering settings to select battery type or define custom parameters.
To select your battery type:
- Long press the BAT/▲ key to enter the setting program.
- Use the BAT/▲ and DC/▼ keys to toggle through the battery type options.
- Press the SET/⚙ key to save and confirm.
- If you select "User-defined battery type", you can proceed with setting the following battery parameters: Absorption Voltage, Float Voltage, Low Voltage Cutoff, and Load Timer.
5. Operating Instructions
5.1 LCD Screen and Working Modes
The controller features a clear backlit LCD screen that displays real-time operational data and status indicators. The working modes are indicated by numerical codes:
Figure 6: Backlit LCD Screen Interface
This image shows the backlit LCD screen of the solar charge controller, displaying various parameters like PV input, battery voltage, and load status. It also includes a table detailing working modes (Night mode, MPPT Charging, Boost Charging, Floating Charge) and common fault codes with their causes and solutions.
- 3.0: Night mode, no charging.
- 4.0: MPPT Charging Mode.
- 7.0: Boost Charging Mode.
- 8.0: Floating Charge mode.
5.2 Battery Voltage Calibration
If there is a discrepancy between the battery voltage monitored by the controller and the value measured by a multimeter, you can calibrate the battery voltage using this setting.
- Long press the BAT/▲ key to enter the setting program.
- Use the BAT/▲ and DC/▼ keys to adjust the value size.
- Then press the SET/⚙ key to save and confirm.
5.3 Load Work Modes
The controller supports multiple load work modes to manage your DC output:
Figure 7: Load Output Modes
This image displays the three primary load work modes available on the solar charge controller: "00H" for Load Turn OFF, "24H" for Load always Turn ON, and "01H~23H" for Time control (setting load ON's duration).
- 00H: Load Turn OFF.
- 24H: Load always Turn ON.
- 01H~23H: Time control (Set load ON's duration).
6. Maintenance
Regular maintenance ensures optimal performance and longevity of your solar charge controller.
- Periodically check all wiring connections for tightness and corrosion.
- Clean the controller's exterior with a dry cloth to remove dust and debris.
- Monitor the LCD display for any error codes or unusual readings.
- Ensure proper ventilation around the controller to prevent overheating.
- For lithium batteries, ensure the ambient temperature is above 0°C (32°F) during charging.
7. Troubleshooting
The controller's LCD screen may display fault codes to indicate issues. Refer to the table below for common fault codes and their solutions.
| Fault Code | Fault Cause | Solution |
|---|---|---|
| 18 | Input photovoltaic voltage too low | Increase the number of solar panels or connect them in series to raise the photovoltaic input voltage. |
| 60 | Overtemperature protection | Allow the equipment to cool to below the recovery temperature to resume normal charging and discharging. |
| 63 | Battery voltage too high | Measure to confirm if battery voltage exceeds rated voltage and disconnect photovoltaic array circuit breaker. |
| 65 | Battery voltage too low | Charge the battery until voltage exceeds the undervoltage recovery point. Refer to "3.7 Default Parameters for Different Battery Types" for specific details. |
| 71 | Input photovoltaic voltage too high | Reduce the number of photovoltaic arrays connected to the controller to lower photovoltaic input; or adjust series and parallel connections to reduce voltage or current values. |
| 72 | Overdischarging current | Reduce output terminal load to ensure total load is within rated limits of the controller and battery. |
| 73 | Overcharging current | Reduce voltage or current values. |
8. Specifications
| Parameter | Value (POW-M25-PRO) |
|---|---|
| Battery Voltage | 12V / 24V Auto |
| Max. PV Input (12V Battery) | 300W |
| Max. PV Input (24V Battery) | 600W |
| Max. PV Open-Circuit Voltage | <60V |
| Operating Temperature | -20°C to 60°C (6E+1 Degrees Celsius from input is likely a typo, converting to standard range) |
| Dimensions | 6.3 x 4.53 x 2.01 inches |
| Item Weight | 1.1 pounds |
| Display Type | LCD |
| Charging Port Type | DC charging port |
| Included Components | Solar controller |
| Color | Orange |
9. Warranty and Support
Temank provides customer support for its products. For warranty information, technical assistance, or service inquiries, please contact Temank customer service through their official website or the platform where the product was purchased.
Please retain your purchase receipt as proof of purchase for warranty claims.
