Ground-based systems

The best tailor-made solutions for you, solid and verified

Custom fastening solutions: efficiency and safety

TEKNOMEGA supplies custom solutions, considering all project variables to arrive at a verified and competitive result. TEKNOMEGA's approach is to support the designer and installer from the initial stages to achieve the best possible structure.

There are many variables to consider when designing the ground mounting of a photovoltaic system. With reference to the Technical Construction Standards (NTC) of 2018, wind loads depend on:

• Geographical position (Italy is divided into 9 wind zones)
• Altitude
• Payback period (interpretable as the expected life of the building)
• Height from the ground
• Distance from the coast
• Roughness (which takes into account any shielding from obstacles present in the surrounding area)
• Geometry (pressure coefficient Cp)

while snow loads depend on:

• Geographical location (Italy is divided into 3 snow zones)
• Altitude
• Return period

We must also consider the seismic stresses which, obviously, depend on the area (Italy is divided into 4 seismic zones).

In most cases, the structures are then fixed into the ground, so another variable at play is the geological characteristics of the ground itself.

What we have seen so far concerns the input parameters, which are part of a necessary data collection for each specific system.

Once the input parameters have been defined, we have several variables to act on in order to safely size the structure:

• The profile type (e.g. C, U, etc.)
• The section of the profile (e.g. U 100x40x2)
• The material of the profiles (e.g. S355)
• The distance between the posts
• The type of fixing to the ground (fixed pile, ballast, plinth)
• The maximum overhang of the panel with respect to the pole

In addition to the technical aspects of safe construction, TEKNOMEGA also considers cost during the calculation phase to offer a competitive solution.

Various possibilities for anchoring to the ground

Concrete ballast anchored pole

MonoTekno and BiTekno structures

The structures differ mainly in single-pole e double-pole.

Both can have vertical poles fixed to the ground using special pile-driving machines, bolted to ballast, or bolted to plinths set up in the installation area.

BiTekno

Our system MonoTekno It is characterised by a single central pole and represents the simplest solution for both industrial areas and agricultural land.
Thanks to its smaller footprint compared to double-pole structures, it is easy to install, ensuring maximum accessibility to the area under the panels.
Single-post structures are generally designed to install rows of two or three panels horizontally (landscape) or two panels vertically (portrait).

The structures BiTekno, however, are preferable in the case of particularly large sails or for installations on grounds with low cohesion or little internal friction.
Furthermore, these structures are preferable in areas exposed to frequent rainfall, strong gusts of wind or heavy snowfall.
On double-pole structures, rows of two panels can be installed vertically (portrait) or rows of three or four panels horizontally (landscape).

The structures can be built with any module inclination in the range of 10°-35°; other inclinations will be evaluated upon request. 

The basic structures can be re-engineered to create custom structures.

By reducing the required components to a minimum, TEKNOMEGA structures stand out for their simplicity of on-site logistics and, above all, installation.
No special equipment, drilling or welding is required on site for assembly.

Wind tunnel testing

All TEKNOMEGA structures, including ground-mounted systems, are sized in accordance with the provisions of the Technical Construction Standards (NTC2018).

For structures to be installed abroad, TEKNOMEGA is able to perform all the necessary checks required by local regulations and/or Eurocodes.

The coefficients used in the calculations have been extensively verified with specific wind tunnel tests on scale structures, not neglecting edge effects or wind coming from different angles. 

BiTekno

Ground-mounted photovoltaics

Our ground-mounted photovoltaic systems are made with load-bearing structures:

• Made of unalloyed structural steel with hot-dip galvanization
  or
• Made of cold-formed steel with aluminum-zinc-magnesium corrosion protection.

The connections between profiles are made with standardized elements in hot-dip galvanized steel and aluminum.

All screws are made of geomet or, upon request, of A2 stainless steel, to guarantee excellent resistance to corrosion.