How to Keep Birds and Pests Out From Under Solar Panels

TL;DR: Pigeons and squirrels love nesting under solar panels, which can cause chewed wires, corrosion, and lower output. The fix is a critter guard — metal or mesh barriers around the panel edges, typically costing $300-$1,000 installed. Leave airflow gaps, trim nearby trees, and use a professional if pests have already moved in.

Your solar panels make a warm, sheltered home for more than just your energy bills. Birds and squirrels often nest underneath arrays, and once they settle in, the damage adds up fast. Here’s how to protect your system and keep pests out for good.

Why Pests Love Solar Panels

The gap between panels and your roof is dry, warm, and hard for predators to reach, which makes it perfect nesting territory. Pigeons in particular return year after year once they find a spot.

The Damage Pests Can Cause

Chewed wiring: Rodents gnaw on cables, which can cause shorts and system failures.
Corrosion: Bird droppings are acidic and can damage panel frames and metal parts.
Reduced output: Nests and debris block airflow, letting panels overheat and lose efficiency.
Noise and mess: Scratching, cooing, and droppings make the area unpleasant.
Roof damage: Persistent moisture from droppings can speed up roof wear.

The Best Solution: A Critter Guard

A critter guard is a barrier installed around the edges of your solar array to block animals from getting underneath. Most use galvanized steel mesh or rigid plastic that clips onto the panel edges.

Keep airflow gaps open — panels still need ventilation underneath
Choose durable, weatherproof material that matches your system
Make sure the guard is low-profile so it doesn’t affect your warranty

Professional installation usually costs $300-$1,000 depending on your array size and roof layout.

Other Steps That Help

Trim tree branches that give squirrels and birds easy access to your roof
Seal small gaps around roof edges and vents
Remove existing nests before installing a guard, or pests will fight to return
Ask your installer whether pest protection is covered or offered as an add-on

What If Pests Have Already Moved In?

If birds or squirrels are already nesting under your panels, don’t remove nests yourself — panels are heavy and wiring can be live. Hire a solar professional to lift panels safely, clean droppings, check for chewed wiring, and install a critter guard in the same visit.

Conclusion

A small investment in a critter guard protects your solar investment from expensive damage and keeps your system running at full output. If pests are already there, get professional removal and guarding done together, then enjoy a problem-free system for decades.

FAQ

How do I keep birds from nesting under my solar panels?

Install a critter guard — metal or mesh barriers around the array edges — and trim tree branches that give pests roof access.

Can squirrels really damage solar panels?

Yes. Squirrels chew wiring and build nests, which can cause shorts, corrosion, and reduced output.

How much does solar pest protection cost?

A professionally installed critter guard typically costs $300-$1,000, depending on system size and roof layout.

Will a critter guard affect my solar panel warranty?

Quality, properly installed guards should not affect the panel warranty. Check with your installer and keep airflow gaps open.

Do I need to clean bird droppings off my panels?

Yes. Droppings can corrode metal and block sunlight, so clean affected areas gently and consider a guard to prevent repeat visits.