Case Study: How To Install Solar Panels On A Metal Roof

If you've been wondering whether solar panels on a metal roof are a good idea — especially when you've just invested in a brand-new roof — you're asking exactly the right question. The short answer is yes, and when done correctly, the combination can protect your home, lower your energy bills, and serve you reliably for decades.

Here's how one Glen Mills, PA homeowner made it work — and what you should know before moving forward.

Solar Panels on Metal Roof: How Tim B. Made It Happen

Tim B., a homeowner in Glen Mills, PA, was in the market for replacing his roof. He elected to switch from an asphalt shingle roof type to a much more durable, longer-lasting material: metal standing seam.  

A new metal rooftop has an impressive life expectancy (approx. 40—70 years!), and for Tim, this presented a prime opportunity for long-term benefits that would go beyond reliable shelter. Specifically, it would be an excellent chance to incorporate a PV solar system for his home.  

When considering a home solar system, it is a good rule of thumb to consider the current age of the roof. If the roof hasn’t been replaced in decades or is nearing the end of its life cycle, it is beneficial to replace the roof prior to solar panel installation, so that both warranties are good for 25 years and beyond. 

Tim approached TerraSol with the goal of incorporating a solar system that would offset as much of his existing power usage as possible, without damaging or voiding the warranty of the roof.  

Bearing that goal in mind, TerraSol came up with a plan to utilize 3 south-facing roof spaces to fit a total of seventy-seven (77) solar modules on the house. To address the challenge of leaving the new metal roof undamaged, they developed a mounting solution that would utilize metal seam clamps to secure the PV solar panels rather than requiring penetrations.  

The innovative mounting system carries several additional benefits. Not only is it perfect for a metal roof, but eliminating penetrations means no risk of a potential roof leak for the life of the system.

Plus, this mounting method was designed to meet local and state wind and snow loading requirements, so Tim does not have to worry about the system getting damaged in extreme weather situations.  

With this system, Tim could be sure that once the new metal roof and his PV solar system were installed, he would never have to take off or replace any of the equipment on the roof due to water damage.  

Tim’s solar system is now safely secured to his brand-new metal roof. TerraSol’s sleek, all-black panels perfectly match the aesthetic of the black metal roof for a seamless appearance. Best of all, he is confident in the knowledge that both the roof and the system will continue to serve him dependably for many years to come.  

Why Metal Roofs and Solar Are a Great Combination

Before we look at Tim's project, here is why we recommend pairing metal roofs with solar panels.

Metal roofs are made from recycled materials and are lighter than tile or slate, making installation easier for us. They also reflect most sunlight, keeping the roof cool. This helps the panels run better, since they lose efficiency when they get too hot. The panels then shade the roof, which lowers the AC bill inside the house.

Unlike tile roofs or asphalt shingle roofs, metal roofs can reflect 55 to 90% of sunlight, which actually helps improve solar panel efficiency — because solar panels operate more efficiently in cooler temperatures.

They even protect the metal from wind, hail, and UV damage. While a metal roof costs more upfront than shingles, it saves money over time. It lasts longer, needs less maintenance, and lowers energy bills when paired with solar.

The panels act as shade for the roof's surface, and the cooler roof temperature that results can lower air-conditioning demand inside the home, reducing heat buildup and boosting your overall energy efficiency.

Want to understand the basics of how solar energy works? Check out our guide on the basics of photovoltaic technology.

The Challenge: Installing Solar Without Damaging a New Roof

Tim was worried about one thing: he just bought a new metal roof and did not want the solar installation to damage it or void his warranty.

We hear this a lot. Many installers drill holes into the roof and use screws and sealant to stop leaks. That works for corrugated roofs, but it creates a leak risk because sealant fails over time. Drilling holes can cause leaks, rust, and void your warranty.

We always recommend replacing an old roof before installing solar. That way, both systems last for 25 years, and you do not have to pay to remove and reinstall the panels to fix the roof later.

Tim already replaced his roof, so it was our job to install the system without causing any issues.

If your roof is old, we recommend replacing it before we install solar. That way, both warranties last for 25 years, and you won't have to pay to remove and reinstall the panels to fix the roof later.

Tim had already done the smart thing by replacing his roof first. Now it was TerraSol’s job to make sure the solar installation didn't create any new problems.

TerraSol's Solution: A Clamp-Based Mounting System That Doesn't Drill Holes

After evaluating Tim's home and goals, TerraSol designed a plan to utilize three south-facing roof spaces and fit a total of 77 solar modules on the house. The real engineering challenge was finding a mounting system that would keep the new metal roof completely intact.

The solution? A specialized clamp-based mounting system designed specifically for standing seam metal roofs.

Instead of using traditional mounting brackets that require screws and drill holes,we used metal seam clamps. Special brackets that attach directly to the raised seams of the standing seam roof without penetrating the roof panels at all.

No holes. No screws through the roof deck. No sealant required to fill gaps.

This mounting system carries several benefits beyond just protecting the roof:

• No risk of leaks — eliminating penetrations means no potential entry points for water intrusion for the life of the system

• Warranty protection — the roof warranty remains fully intact because the roof's surface is never compromised

• Weather-ready design — the mounting system was engineered to meet local and state wind and snow loading requirements, so the system is built to handle extreme weather without risk of damage

• Low maintenance — with no fasteners to check or sealant to reapply over time, the system requires minimal upkeep

Unlike corrugated metal or tile roofs, where we have to drill, standing seam roofs let us use clamps. If you have one, we take advantage of that to avoid drilling. For a deeper look at how solar panels can work year-round in different conditions, read our post on the effects of winter on your solar energy system.

The Results: 77 Panels, Zero Penetrations, Long-Term Peace of Mind

We used clamps to attach the solar panels to my new metal roof, so there are no holes or leaks. The black panels match my roof perfectly.

I don't have to worry about water damage, and both the roof and the solar system are built to last for more than 25 years. Now, my 77 panels cover most of my electricity use, which lowers my power bills and reduces emissions.

As an added benefit, solar power can also increase home value — a welcome bonus for any homeowner.

What to Consider Before Installing Solar Panels on Your Metal Roof

If Tim’s story resonates with you, here are a few key things to think through before moving forward:

1. What type of metal roof do you have?

Standing seam roofs use clamps, so there is no drilling. Corrugated roofs need screws, so they must be sealed to stop leaks. Knowing your roof type helps your installer pick the right system.

2. What's the current condition of your roof?

If your roof is old, replace it before getting solar. It is cheaper than removing the panels later to replace the roof, and both warranties will align.

3. How much of your electricity usage do you want to offset?

Talk to your installer about your energy use to figure out how many panels you need. The cost depends on the system size, labor, equipment, and incentives. A consultation will show you the numbers.

4. Does the installer understand metal roof solar mounting?

Not all solar installers have experience with metal roofs. Work with a team that knows the difference between standing seam and corrugated systems so they protect your roof warranty.

You can also explore our Solar FAQs for answers to the most common questions homeowners ask before going solar.

Ready to Add Solar to Your Metal Roof?

Tim's project is a great example of what's possible when careful planning meets smart engineering. A brand-new metal roof doesn't have to be an obstacle to going solar — in fact, it's one of the best foundations you can have.

If you're thinking about adding solar panels to your metal roof, TerraSol's experienced team is here to help you design a system that protects your roof, maximizes your energy production, and gives you lasting peace of mind. Request a free consultation today, and let's build something that works for your home for decades to come.

Whether you're still in the research phase or ready to move forward, we also encourage you to prepare your home for energy efficiency and explore how renewable energy is shaping the future for homeowners across Pennsylvania, New Jersey, and Delaware.

When it comes to solar panels on a metal roof done right — no holes, no leaks, no compromise — TerraSol delivers.

Frequently Asked Questions

Will solar clamps damage or void my metal roof warranty?

When installed correctly using a manufacturer-approved clamp system, solar panels on a standing seam metal roof should not void your roof warranty. However, always confirm with both your roofing manufacturer and your solar installer before moving forward.

Can solar panels be installed on corrugated metal roofs?

Yes, but the process is different. Corrugated metal roofs require screws for the mounting system, which means proper sealing around each fastener is essential to prevent leaks. Many installers have experience with both standing seam and corrugated roof installations.

How long does a metal roof solar installation last?

With a properly designed and installed system, both the metal roof and the solar panels are built to perform for 25 to 40+ years. TerraSol designs every system with long-term reliability in mind.

Will solar panels affect my roof's reflectivity or cooling performance?

Solar panels act as shade over the roof's surface, which can actually enhance the cooling benefits of a metal roof. Since metal roofs can reflect 55 to 90% of sunlight, and most solar panels operate at higher efficiency in cooler temperatures, the two systems complement each other well, and the panels help manage heat that would otherwise build up on the roof's surface.

Does going solar reduce my energy bills?

Yes. A properly sized solar system can offset a significant portion of your home's electricity consumption, reducing what you draw from the grid and lowering your monthly bills. Learn more about how to maximize your solar power system to get the most out of your investment.