Features: The solar charge controller features intelligent auto switching technology, boosting charging efficiency by 30% compared to standard controllers while maintaining stable operation even in cloudy conditions. Equipped with industrial grade microcontroller, duals USB ports, and a clear lcd screen, this controller offers real time monitoring with comprehensive protections against overcharge, short circuit, and reverse polarity. Ideal for homeowners, and outdoor enthusiasts seeking solar power management for high drain devices like car refrigerators and lighting systems. Effortlessly powers solar light, marine systems with its 20a output for demanding energy applications. Builts to withstand extreme temperatures, this controller ensures year round performances across diverse environments with automatic 12v/24v battery recognition. Specifications: Material: Plastic Working voltage: 12V / 24V Size:Approx.16.8x9.2cm/6.61x3.62inch Package Includes: 1PC Solar Charging Controller note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.