Impending weather impacts on solar carports and other types of PV parking spaces that no one thinks about

In the world of solar parking facilities, it is of paramount importance that both the solar array and the substructure exhibit exceptional durability of at least 25 years or more to safeguard the investment. Safety aspects such as enhanced impact protection and vandalism resistance play a crucial role in this. These requirements raise the question of whether wooden or metal substructures are the better choice for such solar parking facilities.

At first glance, wooden substructures may appear to be a more cost-effective option compared to steel and aluminum. However, closer examination reveals that the deterioration of wooden structures over time can lead to significant problems. The need for constant repairs and maintenance can considerably increase long-term costs. The key lies in striking a balance between initial investment and long-term benefits.

The choice between wood and metal as the substructure for solar parking lots depends on several factors. It is important to understand the specific advantages and disadvantages of each option in order to make the best possible decision.

Wooden substructures: Cheap, but with long-term risks

Wooden substructures have their appeal due to their lower initial costs. They are easy to work with and assemble, which reduces the initial installation expenses. However, over time, it becomes apparent that wood suffers from the effects of weather, moisture, and pests. This can lead to structural problems requiring regular repairs. The long-term maintenance costs can be substantial and reduce the expected lifespan of the structure.

Metal substructures: Durability and stability

Metal substructures, especially those made of steel and aluminum, offer greater durability and stability compared to wood. They are better protected against the elements and less susceptible to damage from moisture and pests. Furthermore, they generally require less maintenance over time. This results in a longer, more efficient lifespan for the solar system and a better return on investment for investors.

Safety aspects: Enhanced impact protection and vandalism protection

The safety of the solar power system and parking lot users is of paramount importance. Metal substructures often offer better protection against physical impacts such as vehicle collisions. Enhanced impact protection can reduce the likelihood of damage to the system and the parking lot. Furthermore, special design elements can be integrated into the structure to deter vandalism.

Cost-benefit analysis: Consider the long-term perspective

When deciding between wood and metal substructures, it is important to conduct a comprehensive cost-benefit analysis. The higher initial costs of metal can be offset by its longer lifespan and lower maintenance requirements. Investors should consider the potential savings over time to maximize long-term profitability.

Finding the balance

Overall, the choice between wood and metal substructures for solar parking lots is an important decision. While wood may be more cost-effective initially, long-term maintenance costs and deterioration can increase the overall cost. Metal substructures offer greater durability and stability, leading to more efficient use of the solar system. Safety aspects, particularly impact and vandalism protection, are also crucial considerations.

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#️⃣ Hashtags: #SolarParkingSpaces #WoodenSubstructure #MetalSubstructure #Durability #LowMaintenance

Solar parking spaces are a promising way to generate renewable energy while simultaneously optimizing the limited space available in cities and urban areas. However, there are indeed some challenges that can hinder the implementation of such parking spaces.

One of the biggest hurdles is the high cost and planning effort associated with installing solar panels in parking lots. Not only must the cost of the solar panels themselves be considered, but also the cost of the infrastructure required to connect them to the power grid. Furthermore, the space required for the installation of the solar panels must be precisely planned and coordinated to ensure effective use of the available area.

Another obstacle is bureaucratic hurdles and permitting procedures, which can complicate the installation of solar panels in parking lots. Depending on the region or country, different regulations and rules may apply, further complicating the approval and implementation process.

Despite these challenges, there is high demand for solar parking spaces, as they represent an effective way to promote renewable energy while simultaneously optimizing space utilization in urban areas. With careful planning and collaboration between the stakeholders, the obstacles can be overcome to facilitate the implementation of such parking spaces.

➡️ We specialize in providing consulting and planning support for such solar carport projects and in advancing their implementation.

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Solar canopy: Solar-covered parking lot – Image: Wiederspan.Solar

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When it comes to solar carports and PV parking spaces with a wooden substructure, there are some important aspects to consider that are often overlooked. Exposure to weather conditions can have long-term effects on such structures, both in terms of durability and functionality. Here are some points to consider:

1. Magnifying effect caused by sunlight

Solar carports that use semi-transparent solar panels can be susceptible to the magnifying effect. The sunlight passing through the transparent areas of the solar panels can concentrate heat, which in turn can affect the rubber seals and silicone or acrylic sealants. Over time, this can lead to leaks, compromising the structure's durability.

➡️ Depending on the mounting system of the solar modules with the wooden substructure, this has an influence on the rubber seal as well as silicone or acrylic sealants (roof sealant), which can lead to leaks within just a few years.

2. Moisture from below

An often overlooked factor is moisture that can penetrate the wood in the substructure from below. Over the years, this moisture can negatively affect the wood, jeopardizing the structural integrity of the entire construction.

➡️ In addition to general weather changes and humidity from the environment, there is also the breathing of people and the exhaust fumes from combustion engine vehicles.

3. Weather changes and wood reaction

Wood is sensitive to changes in weather, especially temperature fluctuations. The constant changes in weather conditions, particularly the alternation between cold and warm temperatures in the rhythm of day and night, can weaken the wood in the substructure and lead to warping.

➡️ Wood reacts quickly to changes in the weather, which can lead to warping and thus shifting of the modules sooner or later. Even a few millimeters are enough. This will happen even sooner if the construction was carried out quickly and carelessly due to cost and time constraints.

4. Building-integrated photovoltaics, where solar modules take over the function of a roof

Pay close attention to what the supplier says: If the module mounting system is described as weatherproof or water-resistant, this doesn't mean it can't still get wet or rained through. While moisture is kept out, this wording doesn't guarantee complete protection. Weather resistance also depends on the quality of the installation, and it's generally stated that no guarantee of watertightness is given.

5. Long-term effects of moisture (including condensation)

Moisture can penetrate the building material and weaken the wood. This can significantly shorten the lifespan of the parking lot roof and lead to costly repairs. It is therefore essential to use weather-resistant materials and carry out regular inspections to detect and repair damage early.

➡️ In open systems, condensation must always be taken into account when there are temperature differences. This also applies to water droplets carried by wind.

6. Aluminum vs. wooden substructure

When choosing the substructure for solar carports, aluminum is often the better choice compared to wood. An aluminum substructure is less susceptible to the aforementioned weather conditions and can guarantee decades of trouble-free operation.

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#️⃣ Hashtags: #Solarcarports #Weathering #WoodenSubstructure #Aluminium #RobustConstruction

When constructing solar carports with a wooden substructure, it is crucial to consider the potential effects of weather conditions. The magnifying effect of sunlight, moisture from below, the wood's reaction to weather changes, and the long-term consequences of moisture can all compromise the structure's durability and functionality. An aluminum substructure can be a robust alternative that is better able to withstand the challenges of the weather.

The City Solar Carport – with enhanced impact and vandalism protection – Image: Xpert.Digital

Advantages at a glance

• Support & Made in Germany
• Modular & scalable (for 2, 100, 1,000 and more parking spaces)
• Truly waterproof
• Integrated water drainage / concealed rain gutter
• Vandalism protection, optionally with integrated impact protection
• Compatible with all common solar modules
• City Design available in aluminium and 3 different colours
• Depending on the level of self-consumption (degree of self-sufficiency), amortization is possible within 6 years
• Long service life (aluminum substructure)
• 30-year (!) performance guarantee on bifacial and semi-transparent double-glass solar modules (25-year product guarantee)
• Reduction of urban heat islands
• Building-integrated photovoltaics
• Ideally suited for transparent and translucent double-glass solar modules with overhead mounting approval!

Condensation, also known as moisture in the air, occurs when warm air comes into contact with cold surfaces and the moisture in the air condenses. This phenomenon often happens when the temperature difference between the air and the surface is high, as can be the case in open building systems. Condensation can affect building materials in various ways, potentially leading to damage in the long term.

Open systems in buildings, such as solar parking areas, terraces, or balconies, are generally exposed to wind and weather, which increases the likelihood of condensation. Here are some points about how condensation can affect building materials:

1. Moisture damage

When condensation forms on materials such as concrete, wood, or metal, it can slowly penetrate the surface. Over time, this can lead to moisture damage, such as rust, rot, or mold growth.

➡️ Under most conditions, only aluminum is resistant to normal corrosion and rust formation due to its natural oxide layer.

2. Changes in surface texture

Building materials can change their original surface structure due to repeated condensation and drying by condensation water. This can lead to cracks, spalling, and discoloration.

3. Health risks

Surfaces affected by condensation can have an increased risk of mold growth and associated health problems. Mold spores can become airborne and trigger respiratory illnesses.

4. Maintenance costs

Building owners must invest more effort to repair damage caused by condensation. Regular inspections and, if necessary, repairs are required to maintain the integrity of the building materials.

To minimize condensation problems, various measures can be taken:

Material selection

When selecting building materials, those should be chosen that are less susceptible to moisture damage and have a high resistance to condensation.

Regular inspection

Regularly checking building structures for signs of condensation or moisture damage is crucial to identify and resolve problems early.

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It is important to take condensation problems in open building systems seriously, as they can not only compromise structural integrity but also endanger energy efficiency and health in the long term.

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🗒️ Difference between water-repellent, rain-repellent, waterproof, rainproof, water-resistant, rain-resistant and water-resistant in semi-transparent solar modules that also function as a roof.

There is often confusion among the various terms used in connection with the water resistance and durability of semi-transparent solar panels used as roofing. Let's clarify the differences between the terms "water-repellent," "rain-repellent," "waterproof," "rain-resistant," "waterproof," "rain-resistant," and "water-resistant.".

Water-repellent and rain-repellent

These terms refer to materials or surfaces that can repel water or raindrops. They prevent water from penetrating the material. These properties can be useful for protecting the modules from light rain showers or splashes, but they do not provide complete waterproofing.

Waterproof and rainproof

These terms refer to materials or products that completely repel water or rain and prevent it from penetrating. Waterproof and rainproof solar panels are able to withstand heavy rain without water seeping into the modules. This is particularly important when the solar panels also serve as a roof, as it helps keep the space below dry.

Waterproof

The term “water-resistant” is often used synonymously with “waterproof”, but there is a subtle difference. Water-resistant materials can repel water and are resistant to moisture, but they may not be suitable for prolonged exposure to water or heavy rainfall.

Rainproof and water-resistant

These terms indicate that the material or modules are resistant to water or rain, but they may not offer complete waterproofing. They may be suitable for lighter weather conditions but may not be designed for heavy rain or prolonged exposure to water.

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For semi-transparent solar panels used as roofing, it is crucial that they are waterproof or rainproof to protect the spaces below from moisture and water damage. The choice of the correct term depends on the specific requirements and environmental conditions to which the solar panels will be exposed.

The use of high-quality materials and technologies in the manufacturing of these solar modules is crucial to ensure they can meet the required standards. This can include the use of special coatings, seals, and waterproof connectors.

From simple solar carports to large-scale systems: Xpert.Solar offers individual solar carport consultation

Konrad Wolfenstein

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