Solar Panels on Side of House: Comprehensive Guide on Wall-Mounted Solar Panels

Harnessing the power of the sun becomes remarkably feasible with wall-mounted solar panels, and this is because they transform an overlooked space – the side of your house – into a fruitful source of renewable energy.

Key takeaways:

  • South-facing walls are ideal for maximum sunlight exposure.
  • Assess wall’s structural integrity and evaluate weather conditions.
  • Adjustable mounts can optimize angle for optimal energy absorption.
  • Wall-mounted panels may have lower efficiency compared to roof-mounted.
  • Regular maintenance is important for peak performance and energy output.

Assessing Solar Panel Wall-Mount Suitability

assessing solar panel wall mount suitability

When considering wall-mounted solar panels, it’s essential to evaluate several factors to ensure your home is suitable for such an installation. Start by examining the solar potential of the walls on your property. A south-facing wall is preferable in the Northern Hemisphere as it receives the most sunlight throughout the day. In contrast, for those in the Southern Hemisphere, a north-facing wall is ideal.

Check for any obstructions, such as trees or nearby buildings, that might cast shade on the walls and hinder solar energy collection. Additionally, assess the structural integrity of the wall. It must be able to support the weight of the panels and resistant to various weather conditions.

Lastly, consider the local climate. Areas that experience heavy snowfall may not be ideal for wall-mounted solar panels, as the snow could cover the panels and reduce their effectiveness. In contrast, regions with high sun exposure year-round are more likely to benefit from vertical installations.

Structural Considerations for Wall-Mounted Solar Panels

structural considerations for wall mounted solar panels

Prior to installing solar panels on the side of a house, it’s vital to evaluate the structural integrity of the wall. The wall must be able to support the additional load of the solar panels and mounting hardware, which can be significant. Engage a structural engineer or qualified solar installer to conduct a thorough assessment of the wall’s condition.

Consider the following:

  • Wall Material: Masonry, concrete, and certain types of wood framing may offer adequate support, whereas lightweight materials might require additional reinforcement.
  • Mounting Hardware: Properly selected and installed mounting systems evenly distribute the weight and reduce the risk of damage.
  • Weather Exposure: Assess the wall’s exposure to the elements. Walls that face extreme weather conditions may need extra precautions to ensure a secure installation.
  • Insulation and Waterproofing: Installation should not compromise existing insulation and weatherproofing. Sealing around mounts is necessary to prevent moisture from penetrating the building envelope.
  • Existing Damage: Look for pre-existing damage or wear that could be exacerbated by the added weight or installation process.
  • Building Codes: Consult local building codes to understand specific requirements for lateral load-bearing structures.

By accounting for these factors, you can ensure that the foundation for your solar setup is as ready for the future as the technology itself.

Orientation and Angle for Optimal Solar Energy Harvest

The success of a solar energy system heavily relies on its exposure to the sun. When mounting panels on the side of a house, south-facing walls typically offer the best potential for sunlight in the northern hemisphere, while north-facing walls are preferable in the southern hemisphere. However, east or west orientations can still be viable, albeit with slightly reduced efficiency due to the angle of sunlight during peak hours.

The tilt of the panels is just as vital as orientation. For wall-mounted setups, the optimal angle might not be achievable due to the fixed nature of a wall’s pitch. In such cases, adjustable mounting systems can help angle the panels to catch more sunlight. It’s crucial to strike a balance between the ideal tilt and the wall’s structure to ensure maximum energy absorption without compromising the integrity of the installation.

Key points to consider:

  • The optimal orientation for the panels is along a cardinal direction that receives the most sunlight.
  • The tilt angle should aim to match the area’s latitude for peak performance, although this may be constrained by the wall’s angle.
  • Adjustable mounts can offer flexibility in angle optimization.
  • Even sub-optimal angles and orientations can yield significant energy savings with the right setup.

Vertical Vs. Roof-Mounted Solar Panels: Efficiency Comparison

The efficiency of solar panels is largely influenced by their alignment with the sun. Unlike roof-mounted panels which are angled to capture maximum sunlight, vertical installations face a slightly different solar exposure scenario depending on their geographical location and the direction they face.

Sun Path: Vertical panels may miss the peak sun hours that an optimally angled roof system captures, particularly in higher latitudes.

Seasonal Variations: During winter months, the sun is lower in the sky, and vertical panels might perform better relative to their roof-mounted counterparts.

Surface Area: Vertical systems might require more panels to match the output of a roof-mounted array, as they have less direct exposure throughout the day.

Building Shadowing: Adjacent structures can cast shadows on vertical panels, especially at lower sun angles, reducing their overall efficacy.

Aesthetics and Space: While efficiency is a priority, for some, the appeal of preserving roof space and the distinctive look of a wall-mounted setup might outweigh the marginal loss in efficiency.

Each situation warrants a custom analysis to ascertain where and when a vertical setup might outperform or underperform compared to its roof-mounted analog.

Installation Process of Wall-Mounted Solar Panels

The installation process for wall-mounted solar panels involves several steps that need to be carefully followed to ensure safety and efficiency:

1. Site Inspection: A professional installer examines the wall for structural integrity and sun exposure, confirming compatibility with solar panel installation.

2. Mounting Hardware: Solar brackets, which support the weight and stress of the panels, must be securely attached to the wall. It’s essential to use the correct type of anchors for the wall material, whether brick, stone, or wood.

3. Panel Attachment: Solar panels are affixed to the brackets, making sure each is level and securely fastened. Wiring channels are also installed to protect electrical connections.

4. Electrical Integration: The solar panels are connected to an inverter, which converts solar energy into usable electricity for the home. Expert electricians ensure this step adheres to all relevant electrical codes.

5. Grid Connection: If the system will be grid-tied, additional steps are taken to connect to the local utility grid, including installing a net meter for tracking energy consumption and generation.

6. Testing: The entire wall-mounted solar system is thoroughly tested to confirm that it is functioning correctly.

Professional installation is essential for the process, as improper installation could lead to reduced functionality, safety hazards, or structural damage.

Maintenance Requirements for Wall-Mounted Solar Systems

Wall-mounted solar systems, much like their roof-mounted counterparts, demand regular maintenance to ensure peak performance. The accessibility of wall-mounted panels often makes cleaning easier; no need for climbing onto the roof. Simply use a garden hose and a long-handled squeegee to remove dust, dirt, and debris, ideally during early morning or late evening to avoid hot surfaces.

Inspection for any signs of damage, such as cracks or loose connections, should be conducted semi-annually. Additionally, since wall-mounted panels may accumulate leaves, snow, or other obstructions, it’s important to clear these promptly to avoid shading and reduced energy output.

Monitoring system performance is equally critical. Many modern installations come with applications that provide real-time data on energy production. Noticeable dips in efficiency signal it’s time for a professional check-up.

With these simple maintenance steps, wall-mounted solar panels will continue to operate efficiently, saving energy and reducing utility bills over time.

Comparing Costs: Wall-Mounted Vs. Roof-Mounted Solar Panels

When examining cost differences, various factors influence the final price of wall-mounted versus roof-mounted solar panels. The installation complexity of wall-mounted panels can drive up labor costs since installers may face more significant challenges when working on a vertical surface. Additionally, special mounting equipment may be required to secure panels to the wall, potentially increasing material expenses.

Roof-mounted systems generally benefit from a more straightforward installation process, which can translate to lower labor costs. However, if a roof needs reinforcement to support the weight of solar panels, this could negate these savings.

It’s essential to also consider the potential long-term energy yield. Roof-mounted panels typically have an advantage in terms of energy production, due in part to the roof’s angle optimizing solar exposure. This efficiency can lead to sooner recoupment of the initial investment through energy savings. In contrast, the less optimal positioning of wall-mounted panels might result in a longer payback period.

Before deciding, homeowners should request detailed quotes from certified installers for both options, including estimates of energy outputs and potential earnings from any feed-in tariff schemes. This comparison will provide a clearer financial picture to facilitate an informed decision aligned with the individual’s budget and energy goals.

Advantages and Disadvantages of Wall-Mounted Solar Panels


  • Utilization of Space: Ideal for homes with limited or unsuitable roof space, allowing for solar adoption where it otherwise may not be possible.
  • Architectural Integration: Can blend with building design and become a unique architectural feature.
  • Reduction in Shading Issues: Walls may experience less shading than roofs, providing more consistent energy generation in certain environments.


  • Suboptimal Orientation: Most walls do not face the optimal direction for sunlight exposure, potentially leading to reduced efficiency.
  • Lower Tilt Angles: Vertical surfaces are less angled towards the sun, resulting in lower energy capture compared to optimally tilted roof panels.
  • Aesthetic Concerns: Some find wall-mounted panels less visually appealing, impacting the property’s curb appeal.

Understanding these trade-offs is crucial when considering solar panel placement, as each site demands a tailored approach to maximize benefits and minimize drawbacks.

Property Types Ideal for Wall-Mounted Solar Panels

Certain architectural designs and property constraints make wall-mounted solar panels a practical option:

1. Limited Roof Space: Homes with small or obstructed roof areas may opt for wall mounting to overcome space challenges.

2. High-Rise Buildings: Apartment buildings lacking sufficient roof access can benefit from utilizing the vertical space for solar energy.

3. Heritage Properties: Historical buildings often face strict rules regarding roof modifications, making side mounting a viable alternative.

4. East or West Facing Walls: Structures with prominent east or west façades can capture morning or afternoon sun, complementing the roof-mounted systems.

5. Urban Environments: Tight neighborhoods with shading from other buildings can exploit clear wall space for consistent solar access.

Each situation requires a tailored evaluation to ensure that the wall orientation, solar panel type, and installation approach are optimized for maximum energy production and aesthetic integration within the building’s structure.

Planning Permission and Regulations for Wall-Mounted Solar Panels

Navigating planning permission and local regulations is crucial before installing wall-mounted solar panels.

Begin by contacting your local building department. They will inform you about necessary permits and any neighborhood-specific covenants.

Check whether your area is subject to heritage preservation restrictions, as this could limit alterations to building exteriors, including solar panel installations.

Some regions have “solar access rights” that protect your right to sunlight, so consider these when planning your installation.

In certain jurisdictions, solar panel installations are subject to size and placement limitations to preserve aesthetic values of the neighborhood.

Installation may require a professional certified assessment to ensure adherence to electrical codes and safety standards.

Explore incentives and solar-friendly policies in your area that can ease the permitting process or provide financial benefits.

Meeting these requirements is essential for a compliant and safe solar panel system installation on your home’s wall.

The Impact of Tilt On Wall-Mounted Solar Panel Performance

The tilt of solar panels is a crucial determinant of their energy production. Specifically for wall-mounted panels, which inherently possess a more vertical orientation, the tilt can deviate significantly from the optimal solar absorption angle. This angle typically mirrors the geographical latitude of the installation location.

1. Sun Path: With less direct sunlight exposure year-round, wall-mounted panels may experience a reduction in efficiency compared to optimally angled roof-mounted panels.

2. Seasonal Variations: The sun’s path changes with the seasons, and in winter, the lower solar elevation could lead to better performance of vertical installations when compared to summer months.

3. Reflection and Angle of Incidence: A steeper tilt can benefit from light reflected off the ground or snow, an effect known as albedo. However, as the angle of incidence increases, the potential for absorption may decrease.

4. Shadows and Obstructions: Walls may be more prone to shading from surrounding structures and trees, especially at lower sun angles, which could further impact energy yield.

5. Adjustability: Some wall-mounted solar systems offer adjustable tilt features, allowing for angle optimization throughout the year to maximize solar gain.

Understanding these aspects helps in evaluating whether wall-mounted solar panels will meet energy production goals and in ensuring the system’s design is tailored to its environment.

Next Steps for Interested Homeowners

If considering wall-mounted solar panels, start by conducting an energy audit to understand your consumption patterns. Consult with a licensed solar installer to evaluate your home’s suitability and identify the best solar products for wall installation. You may also want to research local regulations and potential incentives, ensuring compliance and maximizing financial benefits.

Secure at least three quotes from different solar providers to compare services and costs. Ensure these professionals have experience with wall-mounted installations. Review your homeowners insurance policy to confirm coverage for solar panel additions.

Visit homes or buildings with wall-mounted solar installations, if possible, to see firsthand how they integrate with the structure’s aesthetics. Educate yourself on the technology and brands available, and stay informed about advancements in solar energy that may impact your decision.

Before proceeding, verify your understanding of the installation timeline, maintenance requirements, and warranty details. Ensure a clear line of communication with your chosen solar provider to facilitate a smooth installation process.


Can solar panels be on the side of the house?

Yes, solar panels can indeed be installed on the side of a house.

Can solar panels be installed on their side?

Yes, solar panels can be installed on their side, although for maximum efficiency, it is recommended to maintain the same orientation—either vertical or horizontal—for an entire block of panels.

Can you have solar panels on a wall?

Yes, solar panels can be mounted on a wall, either parallel to it, tilted away or as an overhanging canopy.

Can solar panels be used as siding?

Yes, solar panels can be used as siding, providing both aesthetic appeal and efficient energy generation for new constructions or existing structures.

Is there any loss of efficiency when solar panels are installed on the side of a house?

Yes, solar panels installed on the side of a house typically experience a loss of efficiency due to sub-optimal sun exposure.

What are the potential challenges when mounting solar panels on a home’s exterior wall?

Potential challenges when mounting solar panels on a home’s exterior wall could include insufficient sun exposure, structural integrity issues, and potential zoning or homeowners association restrictions.

How does the angle and direction of wall-mounted solar panels impact their performance?

The angle and direction of wall-mounted solar panels directly impact their performance, with optimal results achieved when the panels are tilted towards the sun’s path and faced towards the equator.

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