CN3791 MPPT Solar Charger Module - 3.7V Lithium Battery Charging Board (4.2V)

The CN3791 MPPT Charger Module is a simple and reliable solution for charging 3.7V lithium batteries using solar panels, 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 and regulate power from solar panels, ensuring optimal charging performance for lithium batteries up to 4.2V.

Designed for energy efficient systems, it is ideal for solar powered projects, IoT devices, and off grid applications where reliable battery charging is required.

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

Highlights:

• MPPT Charging: Optimizes solar power usage for efficient charging.
  
• Lithium Battery Support: Designed for 3.7V (4.2V max) Li-ion batteries.
  
• High Efficiency: Maximizes energy conversion from solar panels.
  
• Stable Charging: Protects and regulates battery charging process.
  
• Ideal for Solar Projects: Perfect for off grid and renewable systems.

Specifications:

• Input: 12V Solar panel.
• Output: Lithium battery charging.
• Chip: CN3791 MPPT Charger IC.
  
• Battery Type: 3.7V Single cell lithium battery Li-Ion or Li-Po.
  
• Charging Method: MPPT (Maximum Power Point Tracking).
• Full Charge Voltage: 4.2V ± 1%.
• Max Charging Current: 2A.
• PWM Switching Frequency: 300KHz.
• Operating Temperature: -40°C to +85°C.
• Application: Solar charging, IoT, energy systems.
  
• Dimensions: ~45×20×10mm.
  
• Interface: 12-pin (3×Battery(+, -), 3×Solar Panel(+, -)).
  

Ideal For:

• 🔧 Solar powered electronics projects.
  
• ⚡ Charging lithium batteries efficiently.
  
• 🤖 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.