Sounds like a perfect application. Like those solar LED night lights. Low cost/low demand, expendable, doesn’t matter if it works or not. That is a great application for the current state of solar and at price point, the market supports such trinkets.
I think there’s also an application for water pumps for wells. Couple with a lithium battery back up and you can have basically endless water if you’re in a rural location or even if you have a small lake or pond you can put in an irrigation system. These are becoming very efficient.
I love this solar fountain. As soon as the panel faces the sun, the pump starts up and water spurts out. No sun, no water.
In GA you have sunny days almost every day, so these birds have water until the sun goes down.
I have three of them.