The Battery Tender Solar Charger 021-1174 is a compact and efficient solar-powered battery charger. It is designed to charge and maintain 12-volt lead-acid batteries, including flooded, sealed, and gel types. The charger is equipped with a built-in solar panel that captures sunlight and converts it into electricity to charge the battery. It also has a smart microcontroller that monitors and adjusts the charging process to ensure the battery is charged safely and efficiently. The charger has a weather-resistant design, making it suitable for outdoor use. It is easy to install and includes all necessary hardware. With the Battery Tender Solar Charger 021-1174, you can keep your battery charged and ready for use, even in remote locations without access to traditional power sources.