High Efficiency MPPT Solar Charging Module for 3.7V Li Ion Batteries With CN3791 Controller

This compact solar charging module is engineered for reliable off grid power delivery using an onboard CN3791 MPPT charging controller. It ensures stable charging of 3.7V single cell Li ion and Li polymer batteries through constant current and constant voltage operation while maintaining high conversion efficiency even under varying sunlight conditions. The onboard dual 2 pin JST connectors simplify wiring for both solar input and battery output, making the module suitable for rapid integration into embedded and IoT designs.

With a wide solar input range of 5V to 18V, the module provides true MPPT tracking to extract maximum energy from photovoltaic sources. Its 4A charging capability, automatic battery conditioning, soft start, protection features, and status indication make it a dependable power solution for solar-powered IoT nodes, remote sensors, portable electronics, and standalone charging systems.

Features:

• MPPT Charging Technology Maximises solar energy harvesting with true maximum power point tracking
• High Current Charging Supports up to 4A charge current for fast charging of 3.7V Li ion cells
• Wide Solar Input Range Operates efficiently from typical 5V to 18V PV panel inputs
• Stable CC CV Control Provides constant current and constant voltage battery charging
• Protection Functions Includes battery over voltage protection, under voltage lockout and soft start
• Convenient Connectivity Includes dual 2 pin JST connectors for plug and play input and output
• Status Indication LED based charging and full charge indication
• Standalone Operation Requires minimal external components for complete solar charging control

Applications: