new tool idea

Need Help w/Solar-Powered Water Heater for NE NY Poultry

I have a great idea just not the know how to get it done: Objective: Keep the bird water from freezing.

This summer we built a 10x10 Chicken Shack. I oriented the roof so that one flat side it was facing south to south-west to catch the sun. I had planned to place a solar panel on the roof and made a place for a battery at the edge of the roof inside but I just cannot wrap my head around what I need to get this done.