When your solar with battery backup fountain stops making the soothing sights and sounds you have been enjoying, it is time to replace the battery pack on your solar panel. With multiple charges and discharges, the rechargeable batteries in your solar fountain can become less efficient over time. Owning a solar with battery backup fountain gives you the flexibility of choosing how and when it runs. Your fountain can operate during a bright, sunny day, as well as a cloudy day or even at night. During full sun, your fountain is completely powered by the solar panel. As the fountain functions throughout the day it stores excess power in the battery, which allows you to operate your fountain during cloudy days or for several hours at night. Changing your batteries approximately every 12-18 months keeps your fountain running properly so it can add the charm and curb appeal you intended it to.