How Arizona Heat Affects Roofs and Solar Panels in Phoenix

Phoenix homeowners expect intense summer heat, but the temperatures on a roof can be much higher than the temperature you see in the weather forecast. That constant exposure can affect roofing materials, solar equipment, and some of the accessories installed around solar panels.

Here are a few things homeowners with rooftop solar should know about Arizona heat.

Solar Panels Are Designed for Outdoor Heat

Solar panels are built to spend years exposed to direct sunlight, so normal Phoenix summer temperatures do not automatically mean something is wrong with your system.

However, high temperatures can affect how efficiently solar panels produce electricity. Solar panels generally operate less efficiently as their temperature increases, even when they are receiving plenty of sunlight.

That means the sunniest and hottest afternoon is not necessarily when a panel operates at its highest efficiency.

Homeowners usually do not need to do anything special because of this. The more practical concern is keeping the system free from avoidable problems such as heavy dirt buildup, bird nesting, or damaged components.

Dirt Can Build Up During Long Dry Periods

Phoenix can go through extended periods without significant rainfall.

During that time, dust and other airborne debris can gradually collect on solar panels. When rain eventually arrives, it may rinse away some loose dirt, but rain does not necessarily leave the panels completely clean.

For professional solar panel cleaning, Cheetah uses purified or deionized water with a nonabrasive brush rather than pressure washing the panel surface.

Heat Can Be Hard on Plastic Components

The solar panels themselves are only one part of the rooftop system.

Accessories installed around them can also spend years exposed to Arizona sunlight and heat. This is particularly important with pigeon-proofing systems.

Cheetah prefers metal solar panel clips rather than plastic clips because of concerns about plastic becoming brittle after prolonged exposure to Arizona conditions. The bird mesh itself is black PVC-coated galvanized steel.

The goal is not simply to install something that works on the first day. Materials should also be chosen with long-term rooftop exposure in mind.

Pigeons Look for Shade and Protected Areas

Phoenix heat can also make shaded rooftop areas attractive to pigeons.

The space underneath solar panels provides protection from direct sunlight while also giving birds a relatively sheltered place to rest or build nests.

Once pigeons become established underneath an array, homeowners may begin seeing droppings, nesting material, feathers, or repeated bird activity around the roof.

Simply cleaning underneath the panels does not prevent the birds from returning.

For an established nesting problem, solar panel pigeon proofing uses physical exclusion to block access to the protected space underneath the array.

Roof Materials Also Experience Constant Expansion and Contraction

Roofing materials are exposed to repeated heating during the day and cooling overnight.

Over many years, that temperature cycling is one reason homeowners should pay attention to the condition of their roof, especially around areas that contractors regularly access.

If you are planning roof repairs or replacement, tell your roofer if bird mesh or other exclusion materials are installed around the solar panels. Roofing and solar work sometimes requires access to areas where those materials are attached.

After other contractors have worked around the array, it can also be worth checking that existing bird mesh has not been moved or left with an opening.

Be Careful Working on a Phoenix Roof

One of the biggest effects of Arizona heat is simply how dangerous a rooftop can become during the summer.

Roof surfaces can become extremely hot, and solar panels, metal equipment, and roofing materials may be uncomfortable or unsafe to touch.

Homeowners should generally avoid climbing onto a roof just to inspect their solar panels.

Many obvious problems can first be spotted safely from the ground, including loose mesh, heavy pigeon activity, concentrated droppings, and visible debris.

Phoenix Solar Systems Need the Right Kind of Maintenance

Arizona heat is something every Phoenix solar system is designed to live with, but the environment around the panels still matters.

Dust, bird activity, rooftop debris, and aging accessories can all create problems that are easier to address when caught early.

If your panels are heavily soiled or pigeons have started living underneath them, Cheetah Solar Panel Cleaning & Pigeon Control provides solar cleaning and solar bird mesh installation throughout the Phoenix area.