Feature: 1. Solar panel adopt waterproof design, IP65 level, portable and light, easy to carry 2. Solar charger solar cell efficiency up to 20%, dual output voltage 18V‑5V, power is 15W 3. Very suitable for battery maintenance for cars, motorcycles, boats, ships, campers, greenhouses, and home charging 4. Adjustable mounting bracket, adjustable solar panel angle, absorb as much sunlight as possible and generate more electricity 5. The drilling holes on the panel bracket are used for quick installation and fixation, suitable for any place parallel to the ground or perpendicular to the floor Specification: Item Type: Flexible Solar Panel Kit Type: Laminated module Interface: USB + DC interface Waterproof Rating: IP65 Power: 15watts (W) Working Current: 800MA Working Voltage: 18 (V) System Voltage: 20 (V) Open Circuit Voltage: 20 (V) Short Circuit Current: 900 (A) Working Voltage: 5V (±0.2V) Short Circuit Current: 1.15A Temperature Coefficient: ±0.05%℃ Voltage Temperature Coefficient: -0.33%℃ Module Power Temperature Coefficient: -0.23%℃ Component Operating Temperature Coefficient: 45℃ (±5℃) Output Voltage: 18V 800MA and 5V 2A Solar Panel Size: Approx. 420 x 190 x 3mm / 16.5 x 7.5 x 0.1in. Package List: 1 x Solar Panel4 x Suction Cup2 x Hook1 x Charging Cable1 x Battery Cable Clamp Note: 1. This unit is not applicable when your vehicle battery is dead. As a solar battery maintainer, the solution is to charge your battery to extend its life expectancy.2. In addition, it is recommended to unplug the charger at night, in case the blocking diode cannot prevent all reverse discharges.