Solar panel not charging Ring Door Bell

I have a Ring Door Bell 2 and a Solar panel. The area around the front door does not have any power for the door bell so I was hoping the solar panel could keep the door bell charged. It is down to 88% and I am concern that it is not charging the doorbell. I called Customer Support and they told me that the solar panel don't charge the door bell it only helps maintain the battery. Can you please tell me if the solar panel will charge the doorbell or not.