CN3791 9V Mini Solar Lithium Battery Charger Board

Maximum Power Point Tracking (MPPT): Equipped with the CN3791 MPPT tracking management IC, specifically tuned to extract maximum efficiency from nominal 9V photovoltaic solar panels.

High-Efficiency Synchronous Buck Charging: Utilizes a high-frequency PWM step-down switching architecture to convert higher solar panel voltage down to lithium charging levels with minimal heat generation.

Automatic Multi-Stage CC/CV Profile: Safely manages single-cell (3.7V) lithium-ion/LiPo battery charging through trickle charge, constant current (CC), and constant voltage (CV) stages.

Plug-and-Play JST-PH 2.0mm Connectors: Features onboard 2-pin JST-PH 2.0mm terminal sockets for effortless, solder-free connection of solar panels, batteries, and system loads.

Real-Time LED Status Feedback: Onboard surface-mount LEDs provide instant visual indication for active charging progress and full charge state.

Built-in Circuit Safeguards: Integrates protection against overcharging, short-circuit conditions, and reverse current leakage from battery back to the solar panel during low-light conditions.

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

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

Technical Specifications:

Main Controller IC: CN3791.

Input Solar Panel Voltage: 9V 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 9V solar panels. Always check battery polarity before connecting to avoid damage to the board.

Maintenance: Keep PCB contacts dry and clean. Store in an anti-static pouch when not deployed in an active enclosure.

Essential 9V Solar Energy Harvester: Position as the high-efficiency solar charger for 9V panel installations powering outdoor IoT gateways, environmental sensors, and remote weather tracking stations.

Highlight MPPT Optimization & Low Thermal Footprint: Emphasize the advantage of true MPPT tracking over standard linear solar chargers, ensuring maximum power throughput even in variable sunlight.

Recommended Cross-Sell Add-ons: Pair with CN3065 500mA Mini Solar Lithium Battery Charger Board, CN3791 6V Mini Solar Lithium Battery Charger Board, TP4056 1A lithium charging module Type-C, and ESD antistatic mat 50x40CM PCB Welding Mat.

Featured Collection Star: Display prominently on your Solar Charger Module collection page under 9V MPPT power conversion modules.