Are Older Solar Panel Installations More Vulnerable to Wildlife Damage?

Solar panels have been installed across Massachusetts homes for more than a decade. Many systems installed during the early growth of residential solar are still operating today. While these systems often continue producing energy efficiently, homeowners sometimes discover a problem they did not anticipate when the panels were first installed.

Animals.

Squirrels, birds, raccoons, and other wildlife are increasingly being found nesting beneath solar panels. In many cases, the problem appears more often with older solar installations.

So why does this happen, and should homeowners with older systems be concerned?

Earlier residential solar installations were typically designed with energy production as the primary focus. Protection against animals was not always part of the installation plan.

Most early systems left open gaps between the panels and the roof, creating a sheltered space underneath. To wildlife, this space offers:

Over time, animals begin to recognize these spaces as reliable shelter.

As a result, homes with older solar systems may see repeated nesting activity year after year.

Massachusetts has several species known for nesting under rooftop solar arrays. Homeowners often report activity from:

Eastern gray squirrels are extremely common throughout Massachusetts. They frequently chew on wiring and insulation.

Pigeons and starlings often build nests under panels where the structure protects them from wind and weather.

Chipmunks may use the space for storing food and shelter.

In some areas, raccoons attempt to access the space under panels when searching for warm nesting spots.

These animals can cause damage that goes beyond simple nuisance problems.

The longer a solar system remains on a roof without protective barriers, the more opportunities animals have to access it.

Older systems may develop additional vulnerabilities such as:

Once animals begin nesting, they often return each season.

In some cases, multiple generations of animals may use the same nesting location.

Homeowners often notice subtle signs before discovering the source of the problem.

Common warning signs include:

Recognizing these signs early can prevent more serious damage.

Protective mesh barriers installed around the perimeter of solar panels help block animals from accessing the space beneath them.

This barrier allows airflow around the panels while preventing animals from entering.

For homeowners considering installing protection, understanding the installation process can be helpful. This article explains how installations are typically performed: How to Install Critter Guard on Solar Panels in Massachusetts.

Yes. Even if a solar system has been installed for many years, protecting it can still help extend its lifespan.

Solar panels are designed to last 20 to 30 years. During that time, preventing wildlife access can help protect:

Adding protection later can still prevent costly repairs and system disruptions.

Many homeowners only consider wildlife protection after they first notice animal activity.

However, others choose to install protection as a preventative measure once their system reaches several years of age.

This article explains how long protection systems typically last and whether maintenance is needed: Are Critter Guards a One-Time Install or Ongoing Maintenance?