1. Introduction
Thank you for choosing the OOYCYOO M100A 100A Solar Charge Controller. This device is designed to manage the power flow from your solar panels to your battery bank, ensuring efficient charging and protecting your batteries from overcharge and over-discharge. It features automatic 12V/24V system identification, an intuitive LCD display, dual USB outputs, and advanced MPPT+PWM charging technology.
2. Safety Instructions
Please read all instructions carefully before installation and operation. Failure to follow these instructions may result in damage to the controller, batteries, or other components, and may cause personal injury.
- Ensure the battery has sufficient voltage for the controller to recognize the battery type before first installation.
- The charge controller is suitable for lead-acid batteries (OPEN, AGM, GEL) and Lithium batteries. Do not use for other battery types.
- Install the charge controller indoors, away from direct sunlight, high temperatures, and humid environments.
- The controller will generate heat during operation; ensure good ventilation.
- The positive and negative terminals of the solar panel, battery, and load must be connected correctly. Reverse polarity can damage the controller.
- Always connect the battery first, then the solar panel, and finally the load. Disconnect in the reverse order.
- This device is for off-grid solar systems only.
3. Product Features
- Automatic identification of 12V/24V battery systems.
- Advanced MPPT+PWM charging mode for high efficiency (up to 99% tracking efficiency).
- Intuitive LCD display showing real-time panel/battery voltage, charge current, error codes, and data history.
- Dual 5V/2A USB outputs for charging mobile devices.
- Multiple protection functions: overload, short-circuit, under-voltage, reverse polarity.
- Automatic temperature compensation.
- User-programmable parameters and one-key factory reset function.
- Durable aluminum alloy cooling panel.
Figure 3.1: Front view of the OOYCYOO M100A Solar Charge Controller, highlighting the large LCD display and control buttons.
4. Specifications
| Parameter | Value |
|---|---|
| Model | M100A |
| Max Power Current | 100A |
| System Voltage | 12V/24V Auto-identification |
| Max Solar Panel Peak Power (12V System) | 1300W |
| Max Solar Panel Peak Power (24V System) | 2600W |
| Battery Capacity Configuration | Up to 400Ah |
| Battery Floating Voltage (12V/24V) | 13.8V / 27.6V |
| Battery Under-voltage Protection (12V/24V) | 10.6V / 21.2V |
| USB Output | Dual 5V/2A |
| Display Type | LCD |
| Material | ABS, Aluminum Alloy |
| Dimensions (L x W x H) | 170mm x 95mm x 40mm |
Figure 4.1: Physical dimensions of the OOYCYOO M100A Solar Charge Controller.
5. Component Identification
Familiarize yourself with the different parts of your solar charge controller:
Figure 5.1: Labeled diagram of the controller's front panel and connection terminals.
- LCD Display: Shows system status and parameters.
- Menu Button: Navigates through display interfaces and enters settings.
- Up Button: Increases parameter values or scrolls up.
- Down Button: Decreases parameter values or scrolls down.
- Dual USB Ports: 5V/2A output for charging external devices.
- Solar Panel Terminals: Connect to solar panels (positive and negative).
- Battery Terminals: Connect to battery bank (positive and negative).
- Load Terminals: Connect to DC loads (positive and negative).
6. Installation & Wiring
Follow these steps for safe and correct installation:
- Prepare for Installation: Choose a well-ventilated, dry, and cool location for the controller, away from flammable materials. Ensure sufficient space around the controller for air circulation.
- Connect the Battery: First, connect the battery to the charge controller's battery terminals (marked with a battery symbol). Ensure correct polarity (+ to + and - to -). The controller will automatically detect the battery voltage (12V or 24V).
- Connect the Solar Panel: Next, connect the solar panel to the charge controller's solar panel terminals (marked with a sun symbol). Again, observe correct polarity.
- Connect the Load: Finally, connect your DC loads to the charge controller's load terminals (marked with a light bulb symbol). Ensure correct polarity.
Important Wiring Order: Always connect the battery first, then the solar panel, and finally the load. To disconnect, follow the reverse order: disconnect the load, then the solar panel, and finally the battery.
Figure 6.1: Schematic wiring diagram showing connections for solar panel, battery, and load.
Figure 6.2: Close-up of the wiring terminals on the OOYCYOO M100A controller.
7. Operating the Controller
The LCD display provides real-time information and allows for parameter adjustments.
7.1 LCD Display Interfaces
Press the MENU button to browse through different display interfaces:
Figure 7.1: Overview of LCD display interfaces and parameter adjustment process.
- Main Display: Shows current battery voltage, solar panel charging status, and load status.
- Float Voltage: Displays the voltage at which the battery is maintained after full charge.
- Discharge Reconnect Voltage: The voltage at which the load will be reconnected after low voltage disconnect.
- Discharge Stop Voltage: The low voltage disconnect point for the load.
- Load Work Mode: Configures how the load operates (e.g., always on, dusk to dawn, timed).
- Battery Type: Selects the battery chemistry (Gel, AGM, Flooded, Lithium).
- Work Parameter Display: Shows other operational parameters.
7.2 Setting Parameters
To adjust parameters (e.g., Float Voltage, Discharge Stop Voltage, Battery Type):
- Navigate to the desired parameter interface using the MENU button.
- Once on the parameter interface (e.g., Float Voltage), press and hold the MENU button for 5 seconds until the value starts flashing.
- Use the UP and DOWN buttons to adjust the value.
- Press the MENU button again to save the setting and exit the flashing state.
Note: The controller supports 7 programmable charge modes for different battery types (Gel/AGM/Li/Flooded). Ensure the correct battery type is selected for optimal charging and battery longevity.
7.3 USB Output
The dual 5V/2A USB ports can be used to charge compatible electronic devices. These ports are active when the controller is powered by the battery.
8. Maintenance
Regular maintenance ensures optimal performance and longevity of your solar charge controller:
- Periodically check all wiring connections for tightness and corrosion.
- Keep the controller clean and free from dust. Use a dry cloth for cleaning.
- Ensure the ventilation openings are not blocked to allow for proper heat dissipation.
- Monitor the LCD display for any error codes or unusual readings.
9. Troubleshooting
If you encounter issues, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Controller not turning on / LCD blank | Battery not connected or low voltage; reverse polarity. | Ensure battery is connected first with correct polarity and has sufficient charge. |
| No charging from solar panel | Solar panel not connected; insufficient sunlight; reverse polarity; faulty panel. | Check solar panel connections and polarity. Ensure adequate sunlight. Test panel voltage. |
| Load not working | Load not connected; battery low voltage; load overcurrent; load work mode setting. | Check load connections and polarity. Check battery voltage. Verify load current. Adjust load work mode. |
| Error code displayed | Specific system fault (e.g., overvoltage, short circuit). | Refer to the controller's specific error code definitions (if available in a more detailed manual) or contact support. Generally, check for wiring faults or component issues. |
If the problem persists after attempting these solutions, please contact customer support.
10. Warranty & Support
The product comes with a 30-day money-back guarantee. For any issues or support inquiries, please contact OOYCYOO customer service via email. Provide your purchase details and a description of the problem for faster assistance.
Contact: Refer to your purchase platform or product packaging for specific customer service contact information.