CN3791 12V Mini Solar Lithium Battery Charger Board

Maximum Power Point Tracking (MPPT): Integrates the CN3791 MPPT tracking controller IC, specifically engineered to optimize solar energy conversion from nominal 12V photovoltaic panels.

High-Efficiency Synchronous Buck Charging: Utilizes a high-frequency PWM step-down switching topology to efficiently charge single-cell lithium batteries from 12V solar sources with minimal thermal dissipation.

Automatic Multi-Stage CC/CV Charging Profile: Safely charges single-cell (3.7V) lithium-ion/LiPo batteries through constant-current (CC) and constant-voltage (CV) charging profiles up to 4.2V.

Plug-and-Play JST-PH 2.0mm Connection Ports: Equipped with standard 2-pin JST-PH 2.0mm terminal connectors for quick, solder-free wiring of solar panels, battery packs, and load connections.

Dual Real-Time LED Status Indicators: Onboard surface-mount LEDs provide clear visual feedback during active charging and charge completion.

Comprehensive Circuit Protection: Onboard protection against overcharging, output short-circuits, and reverse current leakage from the battery back to the solar panel during low-light conditions.

Housing & PCB Style: Double-sided FR-4 glass epoxy PCB with high-density SMD components and high-current power inductor.

Contact & Terminal Style: Standard JST-PH 2.0mm male connector sockets and direct input/output solder pads.

Technical Specifications:

Main Controller IC: CN3791.

Input Solar Panel Voltage: 12V Nominal Photovoltaic Panel.

Target Battery Chemistry: 3.7V Nominal Single-Cell Li-Ion / LiPo (4.2V full charge).

Max Output Charge Current: Up to 2A max.

Color: Blue PCB with white JST connector housings.

Usage Advice: Specifically calibrated for 12V solar panels. Always double-check input and battery terminal polarity (+ and -) prior to applying solar power.

Maintenance: Keep PCB contacts clean, dry, and free of dirt or solder flux. Store in an anti-static bag when not deployed in an active enclosure.

Essential 12V Solar Energy Harvester: Position as the premium MPPT solar power module for 12V solar installations powering remote IoT gateways, off-grid telemetry nodes, and weather tracking systems.

Highlight 12V MPPT Optimization & High-Efficiency Bucking: Emphasize true MPPT capability that extracts maximum efficiency from standard 12V panels while keeping operating temperatures low.

Recommended Cross-Sell Add-ons: Pair with CN3065 500mA Mini Solar Lithium Battery Charger Board, CN3791 6V Mini Solar Lithium Battery Charger Board, CN3791 9V Mini Solar Lithium Battery Charger Board, and ESD antistatic mat 50x40CM PCB Welding Mat.

Featured Collection Star: Display prominently on your Solar Charger Module collection page under 12V MPPT power conversion modules.