With the current economic and environmental trends, the demand for solar energy is increasing. Government incentives have further enhanced the opportunity to invest in solar panels, ensuring the long-term value of the energy system.
When using solar energy, you have two main installation options: rooftop installation and solar ground mount installation. Rooftop installation systems utilize your existing roof as a foundation and minimize the use of property space, thus saving costs. Solar ground mount systems, although requiring more land, are easier to install and maintain. They also offer better control over the direction of solar energy, thereby increasing energy production.
When deciding to install solar devices for your business, farm, or home, it is helpful to understand the advantages and potential disadvantages of each option. We provide a detailed comparison of rooftop and ground mount solar panels, including installation methods, costs, benefits, and possible drawbacks, to help you make an informed decision.
1.What is a Solar Ground Mount System?
Solar modules installed on the ground are placed in the open space around your home. You need sufficient sunlight and enough space to place this system. The solar panels are supported by metal frames fixed on the ground. If your roof is not suitable for installing solar modules, ground mount installation is a good choice. Although the initial cost may be higher, ground mount installation can be positioned for optimal sunlight capture, making them more efficient overall. If you have high energy requirements and need many panels, ground mount photovoltaic systems are usually the best choice.
2.What is a Rooftop Solar System?
A rooftop solar system consists of a photovoltaic array installed on the top of residential or commercial buildings. To firmly fix the photovoltaic system on the roof, solar brackets, usually made of aluminum, are used. You can install rooftop systems on various types of roofs, including flat roofs and sloping roofs.
3.Ground Mount vs. Rooftop Mount
Both options can effectively capture sunlight for household use. The main differences lie in cost, permitting, production capacity, and bracket systems.
(1) Cost: Contrary to popular belief, ground mount installation is more expensive than rooftop installation because they require additional structures for the support system. Rooftop installation utilizes the support of the roof itself.
(2) Permits:Â Permit requirements vary by municipality. Different rules may apply to ground and rooftop installations. For example, some municipalities prohibit the ground mounts from being visible on the street. Local regulations may affect the type of system you choose.
(3) Production Capacity:Â Due to the available space and directional flexibility, ground mount installations can usually accommodate more modules and may generate more energy than rooftop installations. However, rooftop systems with better solar access may still be more efficient.
(4) Solar Bracket Systems:Â Standard ground mounts use metal frames driven into the ground to fix photovoltaic panels, and the tilt angle usually ranges from 0 to 60 degrees. Pole-mounted solar systems support multiple solar panels on a pole, usually include solar trackers, and are taller than standard ground mounts. Depending on the type and size of the roof, rooftop installations adopt different installation systems, such as clamp, hook, and rail systems.
(5) Maintenance:Â Ground mount maintenance is simpler; it is easier to clean snow or debris on the ground. We do not recommend homeowners clean the rooftop array by themselves, and it is recommended to hire professionals if necessary. Ground systems can be easily cleaned with a foam brush.
Advantages of Solar Ground Mount Systems
(1) Optimal Sunlight Absorption
To obtain the maximum energy from solar energy, it needs to absorb as much sunlight as possible. This means finding the best angle and direction for the panels. Although this is difficult for rooftop systems, ground mount installation provides greater flexibility. You can point them in any direction and adjust the angle to maximize exposure to sunlight. This is the key reason why people choose ground mounts for optimal sunlight exposure.
(2) Easy Maintenance
Solar ground mount systems are very accessible, whether it is installation, repair, or regular maintenance. Cleaning the components and performing important routine maintenance is a breeze. You don’t have to worry about climbing onto the roof to remove dust, leaves, pollen, or snow.
(3) Suitable for Hilly and Snowy Climates
Ground mount installation provides an adjustable tilt angle, so you can raise your ground mount solar system above the ground. This is especially useful in winter as it can keep the panels away from snowdrifts. Ground mount systems are also suitable for hilly terrain because the pole installation can be easily installed on steep hills.
(4) Improved Airflow and Peak Performance
Solar modules may lose efficiency when the temperature is too high. Ground mount systems have an advantage over rooftop panels because they benefit from better airflow. This can keep the panel temperature lower and help them generate more energy.
Disadvantages of Solar Ground Mount Systems
1.Higher Initial Investment
Solar ground mount systems require more components and labor for installation, which means a larger upfront investment. You may need to build a solid foundation to support the system, similar to a roof structure. In addition, you also need to route the wiring and connect the components, and drive piles into the ground. Renting heavy equipment for this will increase the installation cost.
2.Space Requirement
Ground mount systems do occupy a considerable amount of space. If you have at least a quarter to half an acre of free land, it may be a good choice. But if the land is relatively small, you may have to make some difficult choices about how to use the outdoor space.
3.Complex Permitting Process
Many local governments classify solar ground mount systems as “new construction projects”. This usually means a more complex permitting process, including higher fees. Be prepared to provide additional documents to the local building authority, such as detailed structural drawings, setback measurements of property lines, and load-bearing calculations verified by a professional engineer. Since the permitting and approval process for ground mount installation may be more challenging, it is best to work with an experienced installer who can guide you through all the steps.
4.Description of Contents
Optimal sunlight capture provides flexibility in panel orientation and angle, maximizing sunlight exposure.
Advantages: Easy to install, repair, and maintain without roof access.
The adjustable tilt angle helps keep the components clear of snow and is suitable for sloping terrain.
Better airflow around the panels helps maintain lower temperatures and higher efficiency.
Higher initial investment requires more components, labor, and potentially heavy equipment, increasing the initial cost. Disadvantages:
Occupies a large amount of land space and may require trade-offs in land use.
Complex approval process is usually regarded as a new construction project by the local government and requires a large number of documents and possibly higher fees.
Advantages of Rooftop Mount Solar Systems
1.Lower Labor Costs
Compared with ground mount systems, rooftop solar module installation usually saves labor costs more easily. They require less work because you don’t need any additional equipment, which reduces the cost.
2.Simplified Installation
Getting approval for your rooftop solar system is usually a simple process. You mainly need to submit the drawings of the house and ensure that your electrical and wiring systems comply with local codes.
3.Space-Saving Solution
If your house is a bit tight on space, rooftop components are a good choice. They won’t take up any additional space on your land, unlike ground mount panels which need quite a large space to spread out.
4.Increased Roof Protection
Think of your rooftop solar system as a shield for the roof. It provides a layer of protection against rain, snow, wind, and harmful ultraviolet rays. In addition, it can help your house insulate better, potentially saving you more energy costs.
5.Increased House Value
Houses equipped with solar panels usually attract a higher resale value. Buyers are attracted by their energy-saving effect and the modern sense they add to the property.
Disadvantages of Rooftop Mount Solar Systems
1.Upfront Investment
Installing a rooftop solar system requires a large upfront investment. However, over time, you will see savings on your energy bills, and the government may have incentive measures to help offset the initial purchase cost.
2.Potential Inefficiency
Rooftop solar systems are usually less efficient than ground mount systems because it is a challenge to align the panels optimally with the existing roof structure. You can’t always face directly south (or north in the southern hemisphere). To compensate for this, you may need some additional panels to achieve the desired energy output.
3.Roof Space Limitations
The size and shape of the roof, as well as air conditioning units, vents, and fire safety baffles, etc., will limit the number of panels you can install. If you want to expand the system to get more power later, there may not be enough space.
4.Difficult Roof Maintenance
Compared with ground mount systems, cleaning and maintaining rooftop solar panels is more challenging. You need to make sure you have the right safety equipment and hire professionals to do these tasks. The goal is to have at least one good cleaning a year to remove dust and debris that may reduce the system efficiency.
Description of Contents
Lower labor cost: Due to the use of the existing structure, less labor is required, thus reducing the cost.
1.Advantages
Simplified permitting process is usually very simple and involves basically complying with local regulations.
Space-saving solution does not consume additional land and is an ideal choice for land with limited space.
Increased roof protection acts as a protective layer for the roof, preventing damage from weather and ultraviolet rays and improving insulation.
Increased property resale value by improving energy efficiency and modern appeal.
Upfront investment has a significant initial cost but can save energy and potentially get government incentives in the long term.
2.Disadvantages
Due to possible alignment problems with the roof structure, additional components may be needed to obtain the best energy.
Roof space limitations are limited by the size and layout of the roof, which may limit expansion and the number of components.
Maintenance and cleaning may be challenging and may require professional help.
Should You Choose Solar Ground Mount or Rooftop Mount Solar Panels?
1.Environmental Considerations
The area around the house will affect the power generation efficiency of solar modules. If your roof has a lot of shade, ground mount panels may be more appropriate. On the other hand, if your area often suffers from floods, installing panels on the roof can protect the roof from water damage.
2.Roof Inspection
Before installing solar panels, you need a solid roof. Solar installers will inspect it to ensure that it can bear the weight of the panels.
3.Available Space
Your roof needs enough space to install solar panels. Too many obstacles, such as vents or chimneys, may make rooftop installation difficult. On the other hand, ground mount components need a large amount of open space on your property, and this space will be dedicated to accommodating your solar components.
4.Soil Type
The soil type of the land will affect the installation of ground solar panels. Rocky or difficult-to-dig soil will make the installation time longer, the cost higher, and more effort required. If this exceeds your budget, a rooftop system may be the way to go.
5.Your Budget
Installing solar panels is a significant investment, whether you pay in advance or lease. Before deciding on the type of system, carefully consider your financial situation. Ground mount systems are usually more expensive than rooftop installations. If your roof is in good condition, you don’t plan to disconnect from the grid, and your property is suitable, rooftop solar can save you a lot of money.
6.Future Plans
If you plan to completely disconnect from the grid one day, solar ground mount panels provide more flexibility. Because they are on the ground, it is easier to add more components later. However, if you don’t have these plans, a rooftop system may be sufficient to power your home.
7.Maintenance
Both rooftop and ground mount solar panels need some maintenance, such as cleaning and inspection. Ground mount panels are easier to access and maintain by yourself. Rooftop panels may require professional help for maintenance.
