Garmin Solar smartwatches charge themselves in the sun. As a result, the battery lasts longer and you don't have to charge your smartwatch as often. That's useful if you're outside a lot. With the Garmin Fenix 7 Pro and Garmin Instinct 2 Solar, you can measure your health and sports performance precisely. You can also download offline maps on these smartwatches. That way, you always know where you are and you won't get lost.