Ring Doorbell Solar Panel- What does "Ring Solar Charger is connected and able to charge this device" mean exactly?

I feel like I know what it means, but I've been going through every GD help topic and there is nothing just saying- when you have this message - this is what it means. Not even in the app, usually you can click on the section and it will explain what that means... not here. Anyways, just trying to get a feel for- this means it's actually getting a charge from the sun? Or it's possible to get a charge from the sun but is actually not charging? ABLE TO CHARGE? Why this language? Anyways, any help appreciated.