What are Ground-Mounted Solar Panels? (2024 Guide)

Assuming the same sunlight conditions and total wattage, roof-mount and ground-mount solar panels will have the same electricity output. However, a ground solar panel installation can be designed with an orientation and tilt angle that will maximize the sunlight it captures, which makes the system productive.

On the other hand, the tilt and orientation of a rooftop solar array is limited by your roof slope. A ground-mounted solar panel system can also increase its energy production with a tracking mechanism, which keeps the PV panels angled toward the sun all day long.

This way, you can increase your electricity output and electric bill savings without adding more panels. Solar tracking is not an option for most rooftop installations, since tracking devices are not designed for conventional roof structures.

Setting Up Ground Mounted Solar Panels

There are two main types of structures for residential ground-mounted solar panels:

• A standard ground mount is anchored to the ground in several spots, similar to a canopy or pergola. The top of the structure is a tilted frame, typically made of steel, on which solar panels are installed.
• A pole-mounted system is attached to the ground with a single mast, similar to a small wind turbine or unipole sign. Solar panels are installed on a square or rectangular frame at the top of the mast.

Residential solar panels have a typical size of 65 by 39 inches (17.6 square feet), and the wind can exert a large force when blowing against them. Without an adequate supporting structure, solar panels can be blown away by a strong enough wind.

A strong-enough structure (your roof) already exists when you install rooftop solar panels, but you must build one separately if you’re planning a ground installation. This is normally achieved with a reinforced concrete base or driven piles, while the structure itself is typically made of steel beams. Solar panels are more productive when they face the sun directly.

Of course, the sun’s position in the sky is always changing depending on the time of the day and the season. Sunlight comes from the east during the first hours of the morning, and from the west during the last hours of the afternoon. Also, the sun’s position in the sky is higher during summer and lower during winter. A roof-mounted solar power system has a fixed orientation, which depends on the slope of your roof.

However, ground-mounted solar panels can be equipped with tracking systems, which increase the direct sunlight received by their photovoltaic cells. Solar trackers can be classified as single-axis or dual-axis systems, depending on how they move:

• To track the sun, solar panels can be rotated horizontally from east to west, and they can also be tilted up and down.
• A single-axis solar tracker can only perform one of these movements, while a dual-axis tracker can perform both.
• Among the two types of single-axis systems, east-west trackers achieve a larger production boost than north-west trackers.
• Dual-axis tracking systems have a higher cost than single-axis systems, since they use a more complex mechanism. However, they may be more cost-effective in the long run, as they can achieve a higher efficiency due to their increased accuracy.

Depending on your geographic location, dual-axis solar tracking can increase the electricity output of solar panels by up to 40% compared to a fixed installation. Single-axis tracking normally improves productivity by 25% or more. Solar tracking can be deployed more easily with pole mounts.

Ground-mounted solar panels are a popular choice for DIY solar panel projects, since their installation process is safer. Each solar panel weighs around 40 pounds, and installing many of them on a roof is a dangerous project without the right tools and training (and a supporting crew).

However, the challenge of height is eliminated with a ground-mount solar system.

Is Ground Mounted Solar Cheaper?

Ground-mounted solar panels are safer to install, since there is no need to work on a rooftop, and their maintenance is also simpler. However, the total project cost is higher. Here are a few reasons why:

• You must build a structure to support the PV panels. A rooftop solar installation has a lower cost because the roof itself is the supporting structure.

• The support structure for ground-mounted solar panels also increases the labor requirements for your installation.
• Ground installations also have a more complex permitting process, since they involve foundations and a structural design and are treated as an independent construction.

Keep in mind that while they are more expensive, ground-mounted solar panels are much more productive, and with a solar tracking system can achieve even higher power output.

This means you can recoup your investment faster. If you want to start comparing the cost of a ground-mounted system or rooftop system for your home, you can click below to get a free quote from a top solar compan in your area.

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Ground Mounted Panels Vs. Roof Mounted Panels: Which Is Right for You?

When comparing roof-mounted and ground-mounted solar panels, each option has advantages and disadvantages. The ideal option for your property will depend on site conditions and design preferences. A ground-mounted system offers you the following benefits:

• The installation is safer and easier to do yourself, since there is no rooftop work involved.
• Maintenance and repair is also simpler, as the solar panels and other system components can be easily reached.
• A ground installation can be removed and relocated if you need to use that area of your yard for other purposes in the future.
• If you don’t like how solar panels look with your roof design or facade, a ground installation gives you clean, renewable energy without affecting your home’s appearance.
• Ground-mounted solar panels achieve a higher electricity production, since they can be positioned optimally based on local sunshine. This increases your power bill savings.
• When ground-mounted solar panels are used on farms, the ground below them can be used to grow low-light plants or provide shaded grazing areas for livestock.

Like in any investment decision, ground-mounted solar panels also have disadvantages you must consider:

• Ground installations are more expensive because you must build a supporting structure. A rooftop installation skips this step.
• Ground-mounted solar panels are not allowed by many homeowner associations.
• Even when ground-mounted solar systems are allowed, they tend to have a more complex permitting process than rooftop installations.
• A ground installation takes up space that could be used for other constructions or yard features.
• Since they are accessible, ground-mounted solar panels are more exposed to tampering, damage from animals and other nuisances.
• A ground installation can be blocked from the sun by new constructions or growing trees, while a rooftop system is less likely to be shaded over time.

If you’re considering ground-mounted solar panels, you must first determine if your property has the right conditions. In general, you will need an area that is not covered by shadows, and you should check if any neighboring constructions could block sunlight in the future.

Keep in mind that each solar panel covers around 18 square feet, so if you plan to install 20 of them, you need around 360 square feet of unshaded space. Although rooftop installations are more common, ground-mounted solar panels are often a better investment for some homeowners.

They are ideal for large properties, especially if they have ample areas without obstacles casting shadows. A ground installation achieves a higher electricity production without increasing the number of solar panels you need to purchase, especially if you add a tracking system.

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