Solar PV

Pigeon nesting under solar panels

Warning Do not attempt any electrical or gas work yourself. Always use a qualified, MCS-certified, or Gas Safe registered professional for repairs.

What you’re seeing (symptoms)

You can hear scratching, cooing, or fluttering noises coming from your roof, especially early in the morning. You notice a significant buildup of bird droppings on the panels, gutters, and patio. In some cases, you may see twigs or debris sticking out from under the edges of the panels.

What’s normal vs not normal

Normal:

Birds occasionally landing on your roof or panels.
A small amount of dust or light bird droppings that get washed away by rain.

Not normal:

Pigeons living permanently in the gap between the panels and the roof tiles.
Large piles of nesting material (twigs, grass) visible under the panels.
A significant drop in solar generation because the panels are covered in thick droppings.
The smell of bird waste coming through open windows or into the loft.

Likely causes (ranked)

Perfect habitat: The gap under your solar panels is warm, sheltered from the wind, and safe from predators like hawks.
No bird proofing: The system was installed without “critter guards” or bird mesh around the perimeter.
Low-pitch roof: Pigeons find it easier to nest on roofs that aren’t too steep.
Local population: You live in an area with a high concentration of urban pigeons or neighbors who feed birds.

Quick checks you can do safely

Visual check: Use binoculars to look at the edges of your panels from ground level. Can you see mesh, or is the gap wide open?
Check the gutters: If your gutters are overflowing with twigs and “guano” (bird waste), you almost certainly have a nesting problem.
Monitor generation: Check your solar app. Is your generation dropping significantly even on sunny days?
Listen: Does the cooing noise get louder in the spring (nesting season)?

When to call an installer

To install professional bird-proofing mesh or “spikes” around the perimeter of the array.
To safely clean the panels and gutters using specialized equipment.
If you suspect the pigeons have pecked at or damaged the electrical wiring under the panels.

Questions to ask your installer

“Do you use galvanized or plastic-coated mesh to prevent rust stains on my roof?”
“How do you fix the mesh to the panels without drilling into the panel frames (which voids the warranty)?”
“Does the price include a full panel clean and gutter flush?”

FAQs

Can pigeons damage the panels? Yes. Their droppings are highly acidic and can “etch” the glass over time. More dangerously, their nesting material can trap heat, and their pecking can damage the DC cables, potentially leading to a fire risk. Why didn’t my installer add mesh? Bird proofing is often considered an “optional extra” to keep the initial quote low. Many people only realize they need it after the pigeons move in. Will rain clean the panels? Rain is good for dust, but it often isn’t enough to remove thick, baked-on bird droppings. These can cause “hot spots” on the panels that reduce their lifespan. Can I use a plastic owl? Pigeons are surprisingly smart. They will realize a plastic owl isn’t a threat within a few days. Physical barriers like mesh are the only permanent solution. Is it expensive? Professional bird proofing for a standard 10-12 panel array usually costs between £400 and £700, including scaffolding or specialized ladders.\n

Written by NetZeroNow | Last updated on 2026-03-02

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