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Hãy viết đoạn tóm tắt về nội dung bằng tiếng việt kích thích người mua: Ground-Mounted Solar Panels: Everything You Need to Know

Much of the harnessed solar power that’s part of the expansion of renewable energy in the US comes from big solar farms composed of rows and rows of solar panels oriented to capture the most sun possible. Some of it comes from people installing solar panels (usually on their roofs) to generate their own energy and . Roughly 1 of residential solar power is installed every three months (that’s about 2.5 million solar panels).

You may have considered rooftop solar for your own home, only to find out that ,  or is not suited to solar panels for another reason. Ground-mounted solar panels are an alternative that doesn’t rely on your roof and can produce more energy, all while letting you take advantage of the , and solar power’s long-term savings. Here’s what you need to know.

What is a ground-mounted solar panel?

Put simply, it is what it sounds like: solar panels mounted closer to the ground than a typical roof mounting. They’re generally mounted either to posts or racks that are anchored to the ground. You typically won’t find panels literally on the ground, but rather tilted at an angle to face the sun and at least a few feet above the surface to allow for air to flow around them and water underneath.

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There’s more to it than that, though that’s the gist. Ground-mounted solar panels have some advantages over rooftop panels, but come up short elsewhere.

Standard ground-mounted solar panels

Most standard ground-mounted solar arrays involve metal framing that is driven into or secured to the ground, typically with cement. There are any number of configurations that can be achieved using various racking and mounting systems.

Standard mounting is a great option when access to the panels is a priority. This can be useful in locations that receive a lot of snow, or in situations where servicing, adjusting or replacing the panels is anticipated. 

Ground mounting is also often selected simply because rooftop mounting isn’t an option for some reason. It’s possible but very unusual to install tracking systems on standard ground mounts due to the degrees of freedom required to rotate the panels to track the sun as it moves across the sky daily, and higher and lower during the course of a year. That said, racking systems can allow for some basic seasonal adjustments in tilt.

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“You get 18 percent more (electricity) with a tracking system,” said Wyldon Fishman, founder of the New York Solar Energy Society.

Pros of ground-mounted solar panels

The true advantage of ground-mounted panels is that they don’t have to go on your roof. If your house is in a nice, shady spot but you’ve got a sunny backyard, you can put them there.

Rooftop panels are also captive to your roof design, which may not be ideal since . While the optimum tilt depends on your latitude, the best direction is basically toward the equator. Since most roofs weren’t designed with solar panels in mind, they likely aren’t perfectly positioned to maximize solar energy production. A ground-mounted system can be ideally positioned.

You also get better airflow than putting panels on a roof, which also can improve performance, especially when it’s hot out.

“They’re kind of pretty in the yard,” Fishman said. “It’s also a shade spot, so you can put them up on a canopy and park your car under them and charge your car.”

Fishman cites ease of access for service, replacement and snow removal as primary reasons for ground mounting. There’s also a few downsides to roof-mounting, which can require significant labor costs and increase the complexity of a future roof replacement.

Fishman notes that, in the rare case of a house fire where the fire needs to be vented, firefighters often need to cut a hole in the roof.

“So there’s another reason to not have all that valuable glass and aluminum up on your roof.”

Another advantage to leaving your roof out of the equation is eliminating the risk of damaging it. While solar installers offer warranties against roof leaks, they often don’t extend for the length of your solar panels’ life. While this is a manageable issue and solar panels typically require little maintenance, keeping panels off your roof eliminates the issue altogether.

If your panels do require maintenance, reaching them on the ground is easier than climbing up on the roof.

Disadvantages of ground-mounted solar panels

The biggest drawback of ground-mounted panels is cost. Instead of using a structure that’s already been built — your roof — installers will need to build a new one. This often involves more materials, upfront costs and trenching an underground line to connect the ground-mounted array to controllers and the rest of the system. 

Ground-mounted solar panels might also be more susceptible to damage. While a lawn mower probably won’t throw a rock up onto the roof, ground-mounted panels might be in the line of fire depending how close to the ground they are. Being close to the ground brings your panels closer to animals or kids or other potentially destructive agents. There isn’t definitive data on maintenance costs for ground-mounted panels, though.

In many areas, zoning and setback rules may make it difficult to do a ground-mounted system, simply because many properties may not have the required space from property lines to allow for the construction of an array. 

While rooftop panels don’t take up any space that’s regularly used otherwise, ground-mounted solar systems might consume coveted backyard space.

Ground-mounted solar system cost

Typically ground mounting is going to cost a bit more, but it really is a case-by-case evaluation process. Heaving big panels onto a roof, drilling holes in the roof and weatherizing those punctures can sometimes be a more ambitious undertaking than driving a pole in the ground and putting some panels on it. The energy analysts at Wood Mackenzie estimate that 8 kilowatts of rooftop solar costs $2.99 per watt (or $23,920 in total). 

If a ground-mount system means being able to install trackers, consider how quickly the roughly 18 percent boost in power production might allow you to make up for the extra cost and eventually save more than a rooftop system.

Ground-mounted panels vs. rooftop panels: Which is right for you?

The first step to determine whether rooftop or ground mounting is best for your situation is to assess all your real estate and determine the best potential locations for solar panels based on energy production potential. Are the southern facing sections of your roof and yard shaded?

If there’s good solar potential on both the roof and ground, move on to consider some of the other concerns like potential need for access and the costs of ground versus rooftop mounting.

Finally, you may simply need to consider whether or not you agree with Fishman that an array will make an attractive addition to the landscape.

FAQs

The panels are usually going to be the same ones used in a rooftop or other installation. They might cost more to install, though, since you’ll need a new mounting structure built and more wire laid.

How much do ground-mounted solar panels cost?

Possibly. It will depend on your individual capabilities. Check with local authorities to see what is required to comply with codes and regulations. 

Can you get incentives for ground-mounted solar panels?

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