Here are some methods to stop pigeons from nesting under your solar panels: Use physical barriers: Installing physical barriers such as bird spikes, bird netting, or mesh screens can prevent pigeons from accessing the area under your solar panels and nesting there. Install pigeon decoys: Pigeon decoys such as plastic owls or rubber snakes can deter pigeons from nesting in the area. Use reflective deterrents: Hanging reflective items such as CDs or balloons near your solar panels can be an effective deterrent for pigeons as they are scared of the reflection. Apply bird repellent products: There are bird repellent products available that can be sprayed on the surface of your solar panels to deter pigeons from nesting. Remove food sources: Pigeons may be attracted to your solar panels if there is a source of food nearby, such as bird feeders or open trash cans. Removing these sources can reduce the pigeon population and keep them from nesting. It is important to avoid methods that can harm pigeons, as they are protected by law in many areas. By using humane and effective methods, you can keep pigeons from nesting under your solar panels and protect both the panels and the birds.