Solar string lights are outdoor lighting fixtures that use solar energy to power a series of LED lights on a cable or string. A small solar panel collects sunlight during the day, converts it to electrical energy, and stores it in a rechargeable battery, which powers the lights at night. They typically come with a stake or mounting hardware that allows you to position the solar panel in a sunny location, and the string lights can be hung from trees, fences, or other structures. They are easy to install, require minimal maintenance, and are ideal for outdoor spaces.