1pcs CN3791 MPPT Solar Charger Module – 3.7V/4.2V Lithium Battery Charging, 12V Solar Panel Compatible

Product Description

Product DescriptionCN3791 MPPT Solar Charger Module – Efficient Lithium Battery Charging for Solar PanelsThe CN3791 MPPT Solar Charger Module is designed to maximize energy capture from solar panels or photovoltaic devices, efficiently charging single 3.7V lithium-ion batteries (full charge 4.2V). Its core MPPT (Maximum Power Point Tracking) technology ensures the solar panel outputs high power even with changing light intensity, using a switching DC-DC converter to keep voltage and current product maximized.Key FeaturesMPPT Functionality: Automatically tracks the solar panel’s high power point, even when input capacity decreases, maximizing use of solar output—ideal for solar-powered applications.Battery Charge Management: Provides complete charging for single lithium batteries, including trickle charging for deeply discharged batteries, constant current (set by external resistor), and constant voltage (4.2V±1%) stages.Compatibility & Connections: Works with 6V or 12V solar panels (select module by panel voltage); output connects to 3.7V lithium batteries, with load in parallel. Equipped with 2-pin JST/PH2.0 connectors for easy setup.Protection & Indicators: Includes automatic recharging, charging status/end indicators, soft start, and battery overvoltage protection for safe operation.Performance Specs: 2A max charging current, 300KHz PWM frequency, operating temperature range -40°C to +85°C.Package Includes1 × CN3791 MPPT Solar Charger ModulesThis module simplifies solar-powered lithium battery charging, combining efficiency, protection, and ease of use for applications like portable devices, outdoor gear, and off-grid setups.