More performance. Less effort. — Aero Rail Twice Light by Varista

The Aero Rail Twice Light is an aerodynamic flat roof system, specially developed for large systems and roofs with limited load capacity. The system impresses with its simple installation in just seven steps, made possible by pre-assembled material and a sophisticated, practice-oriented design. With the east-west orientation, the roof area is optimally used, which can result in an increase in performance of up to 30%. In addition, the system does not penetrate the roof, has been wind tunnel tested and comes with ballasting and structural protection mats — for safe, durable and efficient PV installation on flat roofs.
Industrial roof
Aero Rail Twice light
7.106 Module
2,7 MWp

PV substructure on Kalzip — 190 kWp project

Our round seam clamp for calcium roofs was used to install a 190 kWp solar system on the roof of a high school. The robust and easy-to-install substructure ensures that the PV modules are securely and permanently attached — without penetrating the roof covering. This project underlines the high quality and versatility of our substructures for photovoltaic systems and shows how efficiently our systems can be implemented on chalk and metal roofs.
Industrial roof
Rundfalzklemme
456 Module
182 kWp

A strong project from our customer — with the varista ULF 3.0 short track

In Norderstedt, a photovoltaic system with 144 modules was successfully installed on a trapezoidal sheet metal roof — realized with our varista substructure. Our ULF 3.0 short rail impresses with its easy handling and easy-to-install design. It is suitable for all standard trapezoidal sheet and sandwich roofs and enables quick, efficient installation without time-consuming pre-assembly. Thanks to integrated holes and factory-applied EPDM sealing tapes, the system simplifies assembly processes, saves time and costs on the construction site and at the same time ensures secure, long-lasting PV mounting — a real advantage for any photovoltaic project.
Industrial roof
ULF 3.0
144 Module
58 kWp

Flat roof PV made easy with Aero Rail Twice

Most of our customers rely on the Aero Rail Twice system — this is also the case with this flat roof project. The reason for this is the low ballast, easy installation and high flexibility that the system offers for various types of roofs. Pre-assembled components and tool-optimized connections ensure quick, safe and economical installation. This makes the Aero Rail Twice system the ideal solution for efficient and durable PV installations on flat roofs.
Industrial roof
Aero Twice Rail light
378 Module
165 kWp

Flat roof PV in Berlin with Aero Rail Twice

In Berlin, a photovoltaic system with an output of 615 kWp was successfully implemented using our Aero Rail Twice system. The aerodynamic assembly system impressed with its simple and quick installation, which was particularly efficient thanks to pre-assembled components and clear system logic. The low ballast and the sophisticated construction make the Aero Rail Twice the ideal solution for flat roofs with limited load capacity. The result: a stable, safe and durable PV substructure that meets the highest standards of efficiency and ease of installation.
Industrial roof
Aero Twice Rail
1.368 Module
615 kWp
See more

Safe, efficient, durable — our flat roof PV solution in Babenhausen

We provided the substructure for a flat roof project in Babenhausen with an output of 305.44 kWp and a total of 664 modules. Our AERO TWICE RAIL system, which is specially designed for flat roofs with foil roofs, was used. The plant was installed on an east-west elevation, which ensures optimal land use and uniform energy yield throughout the day. Needle tile mats, which reliably prevent material incompatibility due to plasticizers or other chemical influences, ensure additional safety and durability. The project in Babenhausen thus offers a perfect example of how photovoltaic flat roof systems can be implemented efficiently, economically and stably over the long term with the right mounting system.
Industrial roof
Aero Twice Rail
664 Module
305 kWp

30% faster to the finished system — thanks to a smart substructure

Our VSM series substructure with Bramac Classic metal replacement tile and 5527 mounting rail was used for a pitched roof project in Austria. This solution enables professionally correct and clean assembly, completely without processing the existing bricks. Around 2,500 roof hooks and over 2,600 meters of mounting rail were installed, which illustrates the scale of the project. The optimised system reduced assembly time by around 30% — a clear advantage in terms of efficiency and cost-effectiveness. This shows that even on existing tiled roofs, modern photovoltaic systems with the appropriate substructure can be implemented quickly, stably and durably.
Industrial roof
VSM mit Metallersatzziegel
1.128 Module
496,32 kWp

Liggeringen local heating supply, Bodensee

For a demanding solar project, a system with a total of 86 collectors and an impressive collector area of 1,075 m² was built within just four weeks. An assembly system with a 2-foot construction was used, in which two collectors were mounted one above the other. The sturdy mounting was carried out on a ram base, which ensures a high level of durability and safety. The project shows how we implement efficient and stable solar thermal solutions — from planning to final installation.
Open space solar thermal energy
FA DUO ST
86 Kollektoren
1.075 m²

WOW! We designed and produced the substructure for the third-largest solar thermal system in Germany!

We supply our customer with an assembly system specially developed for the SPX5 tube collector. We are thus making an important contribution to the energy revolution and supporting the expansion of sustainable energy sources. The construction site in Stralsund began in October. Our team's work on site will be completed by the end of April. From mid-2025, the solar thermal plant is to be put into operation and produce around eleven gigawatt hours of renewable, CO2-free heat every year.
Open space solar thermal energy
FA DUO ST
144.720 Kollektoren
24.361,2 m²

Optimize construction time with the Varista assembly system

With almost 21 MW, the PV system in Dobl-Zwaring, Austria, directly on the A2, is the largest project to date for which we were able to design, manufacture and deliver our FA DUO bifacial system. The sophisticated system minimizes shading on the back of the module and does not require module clamps. This reduces assembly time by 25% and lowers production costs. The solar park is the largest in Styria and will supply more than 6,000 households from Dobl and the surrounding area.
Open space photovoltaic
FA DUO Bifazial
29.448 Module
20,94 MWp

Solar park Italy: 10 MWp PV substructure with FA DUO bifacial

In Novoli, Italy, our new FA DUO bifacial system was successfully installed. The intelligent design reduces shading on the back of the module to a minimum and thus enables a higher energy yield. Developed and manufactured in Germany, the system is specifically designed for large-scale photovoltaic projects in the megawatt range. The 10 MWp solar project in southern Italy will install around 5,300 posts. Because of the special soil conditions, we have opted for a foundation method involving drilling and backfilling — for maximum stability and long-term reliability. In doing so, we are setting another example in Italy for sustainable energy generation through photovoltaics and showing how our substructures are convincing even for demanding projects.
Open space photovoltaic
FA DUO Bifazial
17.212 Module
10 MWp

Large-scale PV system at Schwechat Airport — reliable substructure

In Schwechat, Austria, we built a sophisticated ground-mounted photovoltaic system in 2022. The particular challenge was the combination of a high module inclination of 30 degrees and the comparatively heavy snow and wind loads. In order to ensure the required stability, we opted for a deep frame of the substructure. Three rows of modules were installed in vertical orientation, which achieved an impressive installation height of 4 meters. In doing so, we are once again showing how our PV substructures offer reliable solutions for major photovoltaic projects in Austria even under challenging conditions.
Open space photovoltaic
FA DUO
10.227 Module
4,7 MWp

Westendorf PV substructure — efficient and economical

In Westendorf, we have built a 5 megawatt photovoltaic system with an easy-to-assemble substructure. Thanks to the single-row construction, site maintenance is easy. The construction is versatile: clamps can be screwed both from above and from below, and the system is universally suitable for all module dimensions. By optimizing for a minimum number of piles, the system offers a stable and at the same time economical solution. The project in Westendorf thus shows how large PV systems can be implemented efficiently, durably and with little maintenance.
Open space photovoltaic
FA UNO
8.550 Module
5 MWp