Dual USB MPPT Solar Charge Controller: Utilizes innovative MPPT technology, achieving a tracking efficiency of up to 99%. If you're unfamiliar with MPPT technology, please refer to the following information: There are many different types of MPPT technology. Our solar controller uses MPPT technology that detects the maximum charging current, rather than boosting or automatically charging based on the solar panel voltage. Multi-Function LCD Display: This controller automatically adapts to 12V/24V voltages. Connect the battery first, then the solar panel. When using for the first time, ensure the battery has sufficient voltage so the controller can correctly identify the battery type. Reliable Protection: Overvoltage, short circuit, overload, overcharge, and over-discharge protection. Automatically focussed MPPT tracking charging ensures high charging efficiency, with continuous detection during charging and bidirectional focus tracking. Industrial-Grade Main Controller: 16AD sampling accuracy provides accurate, real-time display of temperature, charge current, and discharge current, allowing for a clear view of power generation. Note!: Please pay attention to the connection method: connect the battery first, then the solar panel.