Optimize your solar charging setup with this versatile 1A Multi-Function Solar Panel MPPT Controller Charging Module, designed to efficiently manage and protect single or multiple lithium-based batteries including Li-ion, LiFePO4, and lithium titanate types. Featuring advanced Maximum Power Point Tracking (MPPT) technology, this controller maximizes solar energy harvesting from photovoltaic cells, ensuring faster and more efficient battery charging. Key Features: · Wide Compatibility: Supports various lithium battery chemistries such as Li-ion, LiFePO4, and lithium titanate, making it suitable for diverse solar power applications. · Adjustable Output Voltage: Available in 9V and 18V options, with input voltage ranges of DC 9-28V and DC 18-28V respectively, and flexible output voltage adjustable from 1.2V up to 21V depending on model and configuration. · Customizable Output Current: Standard maximum load/output current is 1A, with the ability to modify the current by adjusting the Rcs resistor value to meet specific charging requirements. · MPPT Functionality: Incorporates efficient MPPT technology to optimize solar panel power output and improve charging efficiency, with the option to disable MPPT by changing resistor settings for specialized use cases. · Battery Protection & Maintenance: Features automatic conditioning for deeply discharged batteries, automatic recharge capability, and battery overvoltage protection to extend battery lifespan and ensure safe operation. · Voltage Source Capability: Can function as a voltage source even when no battery is connected, providing flexibility for various power supply scenarios. · Charge Status Indicator: Equipped with a “CR” LED indicator to clearly display charging status for easy monitoring. · Durable and Reliable: Designed to operate within a wide ambient temperature range of -40℃ to +85℃, suitable for harsh outdoor environments. Specifications: · Item Type: Solar Panel MPPT Controller Charging Module · Options: 9V or 18V solar panel compatibility · Input Voltage:  - 9V Model: DC 9-28V  - 18V Model: DC 18-28V  - MPPT Disabled Mode: DC 7-28V (requires resistor modification) · Output Voltage Adjustable Range: 1.2V to 21V depending on model and settings · Maximum Output Current: 1A (adjustable via Rcs resistor) · Operating Temperature: -40℃ to +85℃ · LED Indicator: Charge status (“CR” LED) Package Includes: · 1 x Solar Panel MPPT Controller Charging Module This multi-function solar charging controller is an essential component for solar energy enthusiasts and professionals seeking a reliable, efficient, and customizable charging solution for lithium battery systems. Its advanced MPPT feature, comprehensive battery protection, and flexible voltage/current settings ensure optimal performance and battery longevity in various solar applications.