CN3791 12V MPPT Solar/Wired Lithium Battery Charger – 3.7V/4.2V Output
This MPPT charging module is designed to charge a single-cell 3.7V lithium-ion (Li-ion) battery from a 12V solar panel or 12V DC power source. Powered by the CN3791 controller chip, it uses Maximum Power Point Tracking (MPPT) to maximize energy conversion—ideal for solar charging where light conditions vary.
Simply connect your 12V input (solar or DC) to the input terminals and your battery to the output. Compact and efficient, this board is great for solar-powered projects, backup battery systems, or portable electronics.
Features & Specifications:
- Input Voltage: 12V (compatible with 12V solar panels or DC adapters)
- Output Voltage: 4.2V (for 3.7V Li-ion batteries)
- Charging Current: Up to 2A
- Charging Method: MPPT (Maximum Power Point Tracking)
- Battery Support: Single-cell 3.7V lithium-ion battery
- Charge Status Indicators: Built-in LEDs (charging/full)
- Safety Features: Battery overvoltage protection, soft start
- Recharge Functions: Trickle charge for deeply discharged batteries, automatic recharge
- Switching Frequency: 300kHz (PWM)
- Connectors: 4x 2-pin JST/PH2.0
- Operating Temperature: -40°C to +85°C
- Dimensions: 45 x 20 x 9.5 mm
Note:
- This version is for 12V input only.
- Allow 1–3 mm variation due to manual measurement.
- Actual color may vary slightly based on monitor settings.
