Features: Automatically identify 12V/24V systems to ensuring efficient operate of equipment under different voltages conditions. Adopting advanced maximums power point tracking (MPPT) technology, the charging efficiency is improved by up to 30%. Shell is make of plastic, providing good weather resistance and insulation performances. Suitable for long-term outdoor installation. Built in multiple protections mechanisms such as overcharge, overdischarge, and short circuit ensuring the safe operate of the equipment. Suitable for various usage scenarios such as home solar energy systems, outdoor camping, and vehicle emergencies, providing stable power management solution. Specifications: Component: Plastic shell, copper terminals block, LCD display screen, PCB Color: White/Red Size: about 13.5x14x4cm/5.31x5.51x1.57inch Input voltages: 12V24V systems automatic recognition MPPT tracking efficiency: 98% -99% Charging current: 20A Package Includes: 1pc Solar Controller note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.