A 10W 18V solar panel is a device that uses sunlight to make electricity. The “10W” means it can make up to 10 watts of electricity, and the “18V” means it gives out about 18 volts of electricity when it’s sunny. These panels come in different sizes, but they’re usually small and used for things like charging phones or running outdoor lights. They’re good for the environment because they use clean energy from the sun. You can put them on a roof or someplace sunny to use them.