Optimize your solar charging system with this advanced Solar Panel MPPT Controller Charging Module, designed to efficiently manage the charging of single or multiple lithium-based batteries including Li-ion, LiFePO4, and lithium titanate types. Featuring a maximum output current of 1A, this multi-function battery charger supports photovoltaic cell MPPT (Maximum Power Point Tracking) functionality, ensuring maximum energy harvest from your solar panels. Key Features: · Wide Compatibility: Suitable for charging various lithium batteries such as Li-ion, LiFePO4, and lithium titanate, providing versatile use across multiple battery configurations. · MPPT Functionality: Integrated MPPT technology optimizes solar energy conversion, improving charging efficiency and battery life. · Adjustable Output Voltage: Offers multiple output voltage settings adjustable according to battery requirements (1.2V to 21V depending on model and configuration), accommodating different battery voltages and chemistries. · Configurable Input Options: Available in 9V and 18V versions to match corresponding solar panel inputs, with an option to disable MPPT for broader voltage input range (7-28V). · Customizable Current Output: Default maximum load current is 1A, but can be modified by changing the Rcs resistor value to suit specific charging needs. · Battery Protection & Maintenance: Features automatic conditioning for deeply discharged batteries, automatic recharge, and overvoltage protection to safeguard battery health and extend service life. · LED Charge Status Indicator: Equipped with a “CR” LED that clearly indicates charging status for easy monitoring. · Robust Operating Range: Designed to function reliably in extreme environments with an operating temperature range from -40℃ to +85℃. · Voltage Source Capability: Can operate as a voltage source even when the battery is absent, adding flexibility for various applications. Specifications: · Item Type: Solar Panel MPPT Controller Charging Module · Input Voltage:  - 9V Model: DC 9-28V  - 18V Model: DC 18-28V  - MPPT Disabled Option: DC 7-28V · Output Voltage (Adjustable):  - 9V Model: 1.2-8V (Includes 3.6V, 4.2V, 4.3V, 4.35V, 7.2V presets)  - 18V Model: 1.2-17V (Includes 3.6V, 4.2V, 4.3V, 4.35V, 8.4V, 12.6V, 16.8V presets)  - MPPT Disabled: 1.2-21V (Includes all above presets plus 21V) · Maximum Output Current: 1A (adjustable via resistor) · Operating Temperature: -40℃ to +85℃ Package Includes: · 1 x Solar Panel MPPT Controller Charging Module This Solar Panel MPPT Controller Charging Module is an essential component for efficient solar battery charging, combining flexible voltage and current settings with advanced battery protection features. Ideal for renewable energy enthusiasts and professionals, it enhances solar power utilization while ensuring safe and reliable battery maintenance.