Ring doorbell generation 1 won’t charge with the sun

I have the video doorbell 1 generation. I have mounted on both my front and back door. It doesn’t charge with the sun. The wall near the door is brick. Is there something I can use that will help me without having to take out and using the USB cord. I like that it charges with the sun because the idea of having to take it out just to charge it get very tedious. So it's very disappointing that I have to do that. Also if you can give any advice as to where to place it, like I said I live in a place where the wall are made of bricks.