About This 【High-Efficiency MPPT Charging】elejoy's advanced MPPT technology delivers up to 99% tracking efficiency and 97% peak conversion efficiency, Max PV Voltage 25V,ensuring your solar power system operates at peak performance, even in cloudy environments. 【13.8V LiFePO4 Battery Support】Specifically designed to charge a 13.8V LiFePO4 battery at 13.8V. 【Compact Design】Ultra-compact and lightweight, this controller is perfect for installations in small or tight spaces, offering flexibility without compromising performance. 【Rugged Waterproof Design】With an IP67 rating, this solar charge controller is built to withstand harsh outdoor environments, ensuring full functionality while in use. Whatever the weather, your power is protected! 【Comprehensive System Protection】Equipped with overcurrent, and over-temperature protection, this controller ensures the safety and longevity of your entire solar power system. Overview Color : Black Brand : elejoy Voltage : 13.8 Volts Product Dimensions : 1.89"L x 1.3"W x 0.75"H Material : Plastic