Can Solar Panels Power a Water Trough Heater?

My friend Chase Saxton is smack dab in the middle of the cold front moving through Kentucky. He built a shelter for his horses, which has helped tremendously, but now the horses' water trough is freezing over.



I shared with him how I put an electric heating element in a rubber water trough to keep my chickens' water from freezing. Unfortunately, he doesn't have power ran to the horse shelter. He asked me if I thought some solar panels from Harbor Freight would generate enough power to run a water trough heater.

So, I'm asking you guys. What do you think?