CN3791 – 9V MPPT Solar Charger Module

The CN3791 12V MPPT Module is a high-efficiency solar charging controller designed for charging lithium batteries using photovoltaic solar panels. Based on the CN3791 MPPT charging IC, the module automatically tracks the maximum power point of the solar panel to maximize charging efficiency under varying sunlight conditions.

This compact module supports intelligent charging management for single-cell lithium-ion or lithium-polymer batteries and is ideal for solar-powered embedded systems, DIY renewable energy projects, portable charging systems, and IoT devices.

Technical Specifications:

• Model: CN3791 12V MPPT Module
• Controller IC: CN3791
• Charging Method: MPPT Buck Converter
• Input Voltage: 12V DC nominal solar input
• Supported Solar Panel Voltage: 6V – 18V DC typical
• Battery Type: Single-cell Li-ion / Li-Po battery
• Battery Voltage: 3.7V nominal / 4.2V full charge
• Maximum Charging Current: Up to 2A
• Switching Frequency: 300kHz PWM
• Charging Accuracy: ±1%
• MPPT Function: Automatic maximum power point tracking
• Connector Type: JST / PH2.0 connectors

Features:

• Built-in MPPT solar charging technology
• Optimizes solar panel power utilization
• High-efficiency buck charging design
• Supports single-cell lithium battery charging
• Adjustable charging current capability
• Automatic recharge function
• Deep-discharge battery recovery support
• Compact PCB module design
• LED charging status indication
• Stable operation under varying sunlight conditions
• Easy integration with solar-powered systems

Applications:

• Solar-powered battery charging systems
• DIY solar energy projects
• Portable solar chargers
• IoT and embedded solar devices
• Solar-powered sensors
• Renewable energy systems
• Off-grid charging applications
• Smart outdoor electronics
• Battery backup charging systems
• Educational and prototyping projects