Features: 1.Durable Material: Adopts monocrystalline silicon material, durable and able to withstand high temperatures and waterproof, could be use in harsh outdoor environments. 2.Power Supply: The solar panel can convert sunlight into electricity, dual output design, enough to provide power supply for mobile phones, power banks, car batteries, and more. 3.Long Lasting Durability: Resistant to high temperatures, water, and shocks, suitable for use on mobile vehicles and capable of working in various weather conditions. 4.Easy Maintenance: Requires minimal maintenance and replacement. Regularly cleaning the panel surface is enough to maintain its optimal power generation efficiency. 5.Secure Installation: The panel comes with four suction cups, which can provide better stability and prevent it from loosening or falling off during use. Specification: Item Type: RV Solar Panel Battery Material: Monocrystalline silicon Power: 20W USB Output Port: 5V 2A Maximum DC Output Port: 18V 1.1A Maximum Working Voltage: 18V Open Circuit Voltage: 21.6V Package Material: PET + EVA + TPT Size: Approx. 415x340x3mm/16.34x13.39x0.12in Features: 1. Support high current fast charging 2. Integrated intelligent charging chip 3. Connect DC5521 ports to multiple solar panels in parallel to increase the output power Application: Charge mobile phones, power banks, car batteries, and more