It depends on which one you're interested in. We make 2 different types of solar fountains:
If an item is listed as a "Solar Fountain" then it comes with a standard solar panel which only works when the panel is in direct sun. It does not have a battery pack so it will not charge up.
If an item is listed as a “Solar-On-Demand Fountain" then it does come with a battery pack so it can charge up and store power. It will have an on/off switch so you can either turn it on to enjoy it during the day, or you can turn it off to charge it up during the day. Once the battery is charged you will be able to turn it on in the evening and run it just from the battery.