Want to convert from 9v alkaline to solar rechargeable

[Ken1]

I have 2 ultrasonic pest repellers to control pests from feeding on my garden. They are both powered by 9v alkaline batteries. I would like to know if it is economically feasible to convert them to 9v rechargeable batteries with solar panels mounted on or next to the units to automatically recharge the batteries. If so, what components do I need?

 

[audioguru]

A 9V alkaline battery produces a low continuous power. Then an ultrasonic producer will not be loud enough to shoo pests away. A pest that hears one ignors it. About 40 years ago the US government fined companies who made ultrasonic repellers for false advertising. Ask Google if ultrasonic pest repellers work.