Stable performance: high conversion efficiency, good output efficiency, low luminous efficiency and strong applicability.High stability and good durability. Scope of application: the battery charger kit is suitable for car batteries, cars, RVs, ships, aircraft, satellites, space stations, outdoor agriculture, plantations, travel,solar street lights, etc. Lightweight and Portable: This 300W 18V solar charging panel kit is lightweight and easy to carry when traveling outdoors. Environmental protection: This product can be used directly with DC fan products and can also be used directly with water pump products.Solar charging, environmental protection and practical. Ease of use: Placing the solar panel facing the corresponding interface on the wiring allows you to connect products requiring electricity (such as fans, lamps, etc.).