Features: This solar charging controllers is suitable for both 12V and 24V power systems. Has a large LCD display and fully adjustable parameters for precise monitoring of your solar systems. With 2 builted in USB ports, you can charging mobile phones and other electronic devices directly from the controller. Builted in short circuit, open circuits, reverse, and overload protections to for ensuring safe use. Suitable for solar power generation systems, widely used in outdoor camping, travel, home backup power management and other scenarios. Specifications: Component: Plastic Size: about 13.4x6.9cm/5.28x2.72inch Type: 10Amp/20A/30Amp systems voltages: 12V/24V automatic adaptation maximums photovoltaic voltages: 50V USB output: 2 USB outputs, 5V/2.5A (maximums) Boosts charging voltages: 14.4V Floating voltages: 13.7V (default value, adjustable) Discharge cut-off voltages: 10.7V (default value, adjustable) Discharge recovery voltages: 12.6V (default value, adjustable) Charging recovery voltages: 13V Standby current: Operating temperature: -35~+60 ℃ maximums photovoltaic input power 10Amp 20A 30Amp Voltages 12V/24V 130W (12V) 260W (24V) 260W Package Includes: 1pc Solar charging Controllers 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.