Feature:1. Monocrystalline Silicon Material: The solar car battery charger uses monocrystalline silicon material, which has high battery efficiency and long term stable output. Suitable for home, industry, business, etc2. Impact Resistance: The solar car battery charger uses high transmittance low iron tempered glass to enhance stiffness and impact resistance. Plug and play3. LCD Display: The controller has a large screen LCD display, with charging and discharging parameters, with power off memory function4. Short Circuit Protection: The controller has 3 stage charging management, with built in overcurrent, short circuit, open circuit, reverse connection protection, etc., all of which are self recovery types5. Scope of Application: Suitable for any place where you can get sunlight, for outdoor activities, car, yacht, boat charger. Suitable for home, industry, business, etcSpecification:Item Type: Solar Car Battery ChargerMaterial: Monocrystalline Silicon, PET LaminateProduct Size: Approx. 38 x 28cm / 15.0 x 11.0in (manual measurement allows for errors)Solar Panel Type: Monocrystalline SiliconSolar Panel Power: 30wSolar Panel Open Circuit Voltage (voc): 18VSolar Panel Maximum System Voltage: 18VTemperature Coefficient of Solar Panel Isc: (010+/-0.01)%/CTemperature Coefficient of Volatile Organic Compounds for Solar Panels:-(0.38+/-0.01)%/CTemperature Coefficient of Solar Panel Power Voc: -0.47%/CSolar Panel Temperature Range: -40℃ to +80℃Controller Voltage: 12V / 24V Automatic IdentificationController Current: 50AController Maximum Photovoltaic Voltage: 12V Battery, Up to 23V; 24V Battery, Up to 46V (up to 50v without load)Controller Maximum Photovoltaic Input Power: 660W (12V), 1320W (24V)Controller Standby Current: Controller USB Output: Dual USB Output, 5V/2.5A (maximum)Controller Operating Temperature: -35℃ to 60℃How to Use:First open the solar