CN3791 MPPT Solar Controller Module - 1S 9V 3A Lithium Battery Charger Board

The CN3791 MPPT Solar Controller Module is a simple and reliable solution for charging 3.7V lithium batteries using solar power, making it an essential addition to any electronics enthusiast, technician, or DIY maker.

This module uses MPPT (Maximum Power Point Tracking) technology to efficiently convert energy from solar panels, ensuring optimal charging performance and improved energy utilization.

Designed for higher input capability to 9V 3A, it is ideal for more demanding solar powered applications, providing stable and efficient charging for single cell (1S) lithium batteries.

Perfect for makers, students, and STEM labs where renewable energy systems and efficient power management are essential.

Highlights:

• MPPT Technology: Maximizes efficiency from solar panels.
  
• 1S Lithium Support: Designed for 3.7V (4.2V max) batteries.
  
• High Input Capacity: Supports 9V / 3A input.
  
• Efficient Charging: Optimized for solar energy systems.
  
• Reliable Operation: Stable and consistent charging performance.

Specifications:

• Input: 9V Solar panel.
• Output: Lithium battery charging.
• Chip: CN3791.
  
• Battery Type: 1S Lithium (3.7V / 4.2V charging).
  
• Charging Method: MPPT (Maximum Power Point Tracking).
  
• Full Charge Voltage: 4.2V ± 1%.
• Max Current: 3A.
  
• PWM Switching Frequency: 300KHz.
• Operating Temperature: -40°C to +85°C.
• Application: Solar charging, power management, IoT systems.
  
• Dimensions: ~45×31×7mm.
  
• Interface: 4-pin (Battery(+, -), Solar Panel(+, -)).
  

Ideal For:

• 🔧 Solar powered electronics projects.
  
• ⚡ Charging lithium batteries with solar panels.
  
• 🤖 IoT and embedded systems.
  
• 🧰 DIY renewable energy setups.
  
• 🎓 Arduino & STEM education projects.
  

Note:

Product appearance may vary slightly from the images shown.
Text or markings on the module may differ depending on the batch.