The CN3791 12 V MPPT Solar Charger Module is a high-efficiency battery charging solution designed for solar-powered systems. It uses Maximum Power Point Tracking (MPPT) to extract maximum available power from solar panels, ensuring faster and more efficient charging of 12 V battery packs. This module is commonly used in solar street lights, off-grid power systems, battery backup units, and DIY solar energy projects.
Core Charger Specifications
• Charger Type: Solar battery charger with MPPT
• Controller IC: CN3791
• Charging Method: Buck (step-down) DC–DC with MPPT
• Battery Type Supported: 12 V lead-acid / lithium battery packs (configuration dependent)
Electrical & Interface
• Solar Input Voltage: 12 V – 24 V DC (typical)
• Battery Output Voltage: 12 V nominal
• Maximum Charging Current: Up to 3 A (module dependent)
• MPPT Function: Automatic tracking of optimal panel voltage
• Adjustment: Onboard potentiometer for charge settings
• Protection: Over-voltage and over-current protection
Performance Characteristics
• High conversion efficiency
• Faster charging compared to non-MPPT chargers
• Stable operation under varying sunlight conditions
• Reduced power loss and heat generation
Physical Characteristics
• Module Type: PCB-mounted solar charger
• Compact and lightweight design
• Screw terminals for secure connections
• Suitable for enclosed installations
Compatibility
• 12 V solar panels
• Lead-acid batteries (SLA, AGM, GEL)
• Lithium battery packs (with proper configuration)
• Solar-powered IoT and embedded systems
• Off-grid and backup power projects
Key Advantages
• True MPPT-based solar charging
• Improves solar panel utilization
• Compact and cost-effective design
• Ideal for small to medium solar systems
Technical Insights
• Proper MPPT voltage setting improves efficiency
• Heatsinking recommended at high charge currents
• Battery type must be matched correctly
• Not a full solar charge controller with load terminals
Applications
• Solar battery charging systems
• Solar street lights
• Off-grid power supplies
• DIY solar energy projects
• Backup battery charging systems
Pro Tip
• Match solar panel voltage to battery system
• Ensure adequate airflow for heat dissipation
• Use short, thick wires for high current paths
• Verify charge voltage before connecting battery
Package Includes
• 1 × CN3791 12 V MPPT Solar Charger Module