CN3791 9V MPPT Solar Charger Module for 3.7V Lithium Battery

The CN3791 9V MPPT Solar Charger Module is a highly efficient power management board designed to maximize the energy harvested from a 9V solar panel. Utilizing Maximum Power Point Tracking (MPPT) technology, it ensures your 3.7V lithium batteries (like 18650 or LiPo cells) charge safely and optimally, even under fluctuating sunlight conditions, making it an essential upgrade for off-grid DIY electronics.

Perfect for remote IoT sensor nodes, weather stations, and solar-powered smart devices, this module provides a seamless interface between your solar panel and microcontroller setups (such as Arduino or ESP32). It features standard JST connectors for easy plug-and-play wiring into your custom circuit diagram, alongside onboard LED indicators to monitor the charging status without the need for complex external circuitry.

Features:

• MPPT Technology: Actively tracks the maximum power point of the solar panel to significantly improve charging efficiency over standard controllers.
• 9V Optimization: Specifically calibrated for input from standard 9V solar panels.
• Lithium Battery Support: Designed to safely and efficiently charge 3.7V (4.2V peak) Li-ion and LiPo batteries.
• Intelligent Management: Features automatic recharge, trickle charging for deeply discharged cells, and built-in over-voltage protection.
• Easy Connectivity: Equipped with onboard JST headers for quick, secure panel and battery connections without soldering.

Package Includes:

1 x CN3791 9V MPPT Solar Charger Module