Roof Installed vs. Ground-Mounted Solar Panels

Thanks to shrinking price tags on solar panels and a growing assortment of enticing financial incentives, the number of new solar installations has skyrocketed in recent years. In turn, many homeowners are wondering how to reap the rewards of renewable energy. To choose the best type of solar setup for your needs, you’ll want to understand the pros and cons of ground-mounted vs. roof-installed solar panels. There’s no one-size-fits-all solution, and the right choice will depend on the unique features of your property. 

Ready to weigh your options? Let’s get into the specifics of ground-mounted vs. roof-mounted solar panels! 

What Are Roof-Installed Solar Panels?

Roof-mounted solar panels are photovoltaic (PV) devices that generate electricity from your rooftop. These discrete renewable energy sources put otherwise unused square footage to work to help you make the most of your space. 

Installation is typically quick and easy, as these systems use your existing infrastructure for support. Your solar technician will connect a mounting bracket to your roof, securing the panels in place. Rooftop installations are often completed within 2 to 3 days but may take longer if your roof features a complex design or delicate materials like clay tiles. 

Not every home or rooftop is suitable for solar panels. In order to support a hefty PV array, you must have a structurally sound roof that can withstand extra weight and function for the lifespan of your solar array – 25 to 30 years. While solar panels can work on flat or pitched roofs, those with extreme slopes or certain materials like wood may not offer enough support. 

What Are Ground-Mounted Solar Panels?

Ground-mounted solar panels generate electricity just like roof-installed arrays, but they’re located in your yard vs. on your roof. They use a robust frame or rack system on posts driven into the ground. Spacious yards and large pieces of property often make great sites for these arrays, as they may receive more direct sunlight than smaller parcels. 

These setups take more time to install because technicians must prepare the land, lay electrical wires to your home, and construct the base for your solar panels. Additional materials and labor mean they’re generally more expensive than roof-mounted models.

In some cases, panels can be used to build a solar carport, bridging the gap between ground-mounted vs. roof-mounted varieties. 

What Is The Difference Between Roof-Mounted And Ground-Mounted Solar Panels?

Ready to dive a little deeper into the differences between roof-mounted vs. ground-mounted solar panels? Let’s dig in!

Installation Location

It should come as no surprise that roof-mounted solar panels are installed on the roof of your home or business, and ground-mounted solar panels are affixed in your yard. 

Space Requirements

Roof-mounted solar panels are a popular option for folks with compatible roofing structures that are appropriately oriented toward the sun. However, not every rooftop can accommodate an efficient solar array. Those with extreme slopes and those constructed from materials like wood may not offer adequate support. Additionally, the dimensions of your roof can also limit the size of your solar panel array. 

Ground-mounted solar panels may offer more flexibility to maximize your renewable energy system. If you have a large yard that receives ample sunlight, you can install an array that meets your electrical demands without concerns over the structural integrity or weight-bearing capacity of your roof. 

Aesthetic Considerations

Roof-mounted solar panels are typically flush with the surface of the roof. As such, they don’t create a visual distraction or detract from your curb appeal. Some homeowners may not want a large ground-mounted solar panel array in their front yard, and HOA restrictions might even prohibit them. 

System Size

The specifications of your roof will determine the size and overall energy generation capacity of your roof-mounted solar panel array. The average solar panel weighs about 40 pounds, and most systems incorporate 20+ panels. When you add the mounting hardware, your fully installed rooftop system may weigh well over 1,000 pounds. 

On the other hand, the size of ground-mounted solar panel arrays is generally limited by the size of your property. Weight won’t inhibit your ability to generate ample amounts of energy. 

Efficiency and Performance

Another perk of ground-mounted solar panels is that they can be positioned to soak up the most sunlight possible for optimal performance. Strategic placement and positioning account for angle, orientation, and existing shade, ensuring the greatest level of efficiency. 

While some roof-installed solar panels can incorporate tracking systems to follow the sun’s trajectory, they still won’t have the same potential as grounded alternatives. 

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Pros and Cons of Roof-Installed Solar Panels

Let’s take a look at the advantages and disadvantages of roof-installed solar panels:

Advantages of Roof-Installed Solar Panels

• Maximizes use of existing space.
• Doesn’t take up additional property or yard space.
• Typically less expensive installation due to lower labor and material costs. 
• Fewer permit restrictions.

Disadvantages of Roof-Installed Solar Panels

• Energy generation is limited by roof size and structure.
• Greater potential for shading from nearby trees or buildings.
• More complicated installation process if roof repairs are needed.
• Aesthetic concerns, depending on the home style.
• Cleaning and maintenance are more difficult. 

Pros and Cons of Ground-Mounted Solar Panels

Here are the benefits and drawbacks of installing ground-mounted solar panels on your property: 

Advantages of Ground-Mounted Solar Panels

• Flexible system size and orientation (can be positioned for optimal sun exposure).
• Easier to maintain and clean.
• No impact on roof integrity. Eliminates the risk of leaks and structural damage.

Disadvantages of Ground-Mounted Solar Panels

• May require significant land space.
• Typically more expensive installation due to land preparation and additional materials.
• Can affect the aesthetic appeal of the property, especially if the area is visible.

Performance and Efficiency Factors

The output of any solar panel array will fluctuate based on environmental factors like temperature, sunlight, and extreme weather conditions. Here’s a closer look at how ground-mounted solar panels respond vs. roof-installed arrays: 

Roof-Installed Panels

The slope and orientation of your roof will greatly impact your potential for energy generation. A south-facing roof with a low slope is ideal for roof-mounted solar panels. 

Solar panels perform best when temperatures are around 77℉. As it gets hotter outside, efficiency decreases. Certain roofing materials, like asphalt shingles, absorb heat and negatively affect energy generation, especially during summer. 

Ground-Mounted Panels

Since ground-mounted solar panels don’t have to conform to the pitch or orientation of your roof, you can adjust their position for maximum sun exposure, potentially increasing their efficiency. 

Roofing materials aren’t a concern with these systems. In fact, better air circulation keeps these arrays cooler for optimal performance. However, the distance between your array and your home may impact overall output. Most experts recommend placing ground-mounted solar panels within 500 feet of your home to maintain efficiency. 

Which Is Better: Roof-Mounted Or Ground-Mounted Solar Panels?

Many homeowners face certain limitations that make their property conducive to only one type of solar installation. In those cases, the debate between ground-mounted vs. roof-installed solar panels doesn’t really matter. However, if you have the option for either, here are the factors you’ll want to consider:  

Space and Land Considerations

Homes in tightly packed neighborhoods may only have space for roof-mounted solar panels. Those with adequate square footage and an appropriate roof type can install compact, discreet renewable energy systems on their rooftops without taking up precious recreational space in their front or back yards. 

Larger properties may be more suitable for ground-mounted solar panels. Whether you have a spacious, sunny yard or acres of open land, these setups can offer more flexibility and easier expansion in the future. 

Budget

On average, roof-mounted solar panels are less expensive than ground-mounted varieties because they rely on your existing roof for structural support. Free-standing solar panels require more raw materials and extensive installation, as groundwork often includes trenching and driving support posts. 

Energy Needs

Your household energy consumption can also impact your choice between ground-mounted vs. roof-installed solar panels. If your utility needs are extensive, a rooftop array may not generate a great enough percentage of electricity to justify the installation. In that case, ground-mounted solar panels may be more advantageous. 

Aesthetic Preferences

Some people feel that a large, obstructive solar panel array would disrupt their view or diminish their curb appeal. If you fall into this camp, discreet roof-mounted solar panels might be a better fit for your aesthetic preferences vs. more conspicuous ground-mounted arrays. 

Environmental Impact

Many homeowners would like to reduce their carbon footprint but aren’t necessarily trying to get off the grid. Folks hoping to reduce their utility bills and contribute to local sustainability efforts by participating in net metering programs may achieve these objectives with a roof-mounted solar panel array. 

If you have ambitious sustainability goals, a ground-mounted solar panel installation may allow you to achieve more rigorous energy production to offset your reliance on fossil fuels further. 

Choosing the Right Solar Installation

Choosing the right type of solar installation for your home or business begins with carefully assessing your energy needs and property specifications to better understand your options. A qualified solar installer can help you determine which solution is right for you.
At Solar Energy World, we offer both ground-mounted and roof-installed solar panel arrays. Our knowledgeable experts can help you assess your unique situation to make an informed decision. Get started today with a free solar estimate!