The "Helios" solar carport system from Alumil Solar – Transformation of urban areas through integrated photovoltaic carport systems

More than just shade: How integrated PV carports increase the value of commercial properties

Modern urban planning and commercial real estate development increasingly face the challenge of using limited space more efficiently while simultaneously meeting rising demands for sustainability and energy self-sufficiency. Within this complex environment, solar carports are evolving from a niche solution to a central component of modern infrastructure management. A detailed examination of the Helios system from Alumil Solar, particularly the H2700 and H2700 MAX models, allows for an exemplary analysis of the economic and technical implications of such investments. This involves not simply erecting a shelter, but rather transforming passive parking spaces into active, value-creating power plants that pay for themselves through multifunctional use.

Increased efficiency through functional integration and material selection

A crucial economic factor in evaluating infrastructure projects is the ratio of investment costs to longevity and maintenance requirements. The system examined here relies on a complete aluminum construction. From an expert perspective, this material offers significant advantages over galvanized steel in terms of total cost of ownership (TCO). Aluminum is inherently corrosion-resistant, which drastically reduces maintenance costs over the system's lifetime, particularly in regions with harsh environmental conditions or where road salt is used in winter.

The design concept follows a functional integration approach. Instead of constructing a roof membrane and mounting solar modules on it, the modules themselves function as the roof. This construction method, which utilizes bifacial modules, eliminates the cost of a secondary roof layer and reduces the overall weight of the structure. This has a direct impact on the required foundation and the associated excavation costs. The integrated gutters and guaranteed watertightness transform weather protection into a standard feature, eliminating the need for additional sealing measures. The economic logic behind this is the reduction of material complexity while simultaneously increasing usability.

Technical scalability and area productivity

The productivity of an area is largely determined by the ratio of installed capacity to occupied space. The technical specifications of the H2700 and H2700 MAX models illustrate different scaling options for investors. While the basic H2700 model operates with a depth of just under 4.8 meters and a configuration of four modules per row, the H2700 MAX version maximizes the area utilization with a depth of almost six meters and five modules.

For a parking lot operator, this translates into a significant variance in yield density. In a standard configuration for two parking spaces, the MAX model achieves a total output of up to 9.6 kilowatts peak, compared to 7.68 kilowatts peak for the standard model. Extrapolated to larger parking areas, for example, with 40 parking spaces, this difference amounts to a difference of almost 27 kilowatts peak in installed capacity. This is particularly relevant in markets where grid connection capacity is limited or where self-consumption is to be maximized. The use of 640-watt bifacial modules underscores the commitment to high-performance components. Bifacial cells also utilize light reflected from the ground, which, depending on the albedo of the surface, can increase the yield by a further five to fifteen percent without incurring additional hardware costs.

"Shop & Charge": E-mobility and solar power as new footfall drivers in retail – Image: Alumil Solar

Synergies between energy generation and electromobility

The installation of solar carports is inextricably linked to the rise of electromobility. From a business perspective, the combination of local generation and direct consumption via charging infrastructure represents the most efficient model, as grid fees and electricity taxes can be eliminated or reduced. The Helios system is designed so that cable ducts and mounting fixtures for inverters and wallboxes are already integrated into the columns and supports. This concealed cable routing is not only an aesthetic feature but also protects the critical infrastructure from vandalism, weather, and rodent infestation, which in turn minimizes the probability of failure.

The design, with a column spacing of five meters, allows for the convenient parking of two vehicles between the supports. The absence of front columns significantly facilitates maneuvering and reduces the risk of collision damage, a factor that is positively assessed by parking managers. Furthermore, the shading of the vehicles in summer offers an often underestimated economic benefit: an electric vehicle parked in the shade requires considerably less energy for air conditioning when starting, thus increasing its effective range and protecting the battery chemistry. For fleet operators, this is a factor that directly impacts the operating costs of their vehicle fleet.

Real estate valuation and corporate sustainability goals

In addition to the direct monetary returns from electricity generation, solar carports are playing an increasingly important role in the valuation of commercial properties. The visible installation of renewable energy contributes significantly to achieving ESG goals. Unlike rooftop systems, which often remain invisible, carports signal a clear commitment to sustainability to customers, employees, and investors. This can increase a property's attractiveness and provide crucial points in certifications such as LEED or BREEAM.

The system's minimalist design, with its flush surfaces and concealed screws, aims to avoid disrupting even architecturally demanding environments. This is a crucial aspect in permitting processes. In many municipalities, aesthetic integration into the cityscape is a prerequisite for building approval. A system that appears more like a design element than a purely functional structure encounters less resistance from urban planners and neighbors. Furthermore, the option of integrating LED lighting directly into the rails extends the parking area's usability and safety in the evenings, eliminating the need for separate light poles and thus saving on excavation costs.

Business management perspective of assembly and maintenance

The economic viability of a construction project often hinges on the assembly phase. The system under investigation relies on a high degree of prefabrication and a modular design. Reducing the number of foundations to just two columns for a wide span minimizes this. This is the biggest cost driver in carport construction. Fewer foundations mean less excavation, less concrete, and shorter construction times. Certification by TÜV Nord, along with structural design for wind speeds up to 120 km/h and snow loads up to 150 kg per square meter, provides investors with the necessary planning security and reduces insurance risks.

Cable ducts and mounting fixtures for inverters and wallboxes are already integrated into the columns and supports – Image: Alumil Solar

Maintenance of the system is simplified by the elimination of a traditional roof covering. Since the modules are freely accessible and angled, the self-cleaning effect of rain reduces cleaning intervals. Should a module fail, replacement is easier than with roof-integrated systems thanks to the clamping mechanisms. The use of standard components and the clear separation of the supporting structure and electrical systems also facilitate long-term repairs.

Durability in aluminum: Why Alumil Solar is redefining the standard – Alumil Solar

Assessment of manufacturer competence and long-term investment security

For infrastructure investments designed for a service life of over twenty years, the creditworthiness and experience of the manufacturer are critical factors. Alumil Solar operates as a division of a large industrial group that has been active in the aluminum sector for over three decades and operates globally. With an installed capacity of over two gigawatts in various countries and its own production facilities in Europe, the supplier differs from pure system integrators who simply purchase components.

Vertical integration of production – from aluminum profiles to the finished assembly system – allows for improved quality control and independence from volatile supply chains. For the investor, this translates into greater security regarding spare parts availability and warranty claims. The company's extensive experience in diverse climates suggests that the material specifications can withstand real-world stresses. In conclusion, investing in such a system should be considered not only from an energy perspective, but also as an enhancement of the real estate asset class and as a strategic measure within the framework of corporate transformation.

Konrad Wolfenstein

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