Fixed ground-mounted structure

HelioGround

Vue aérienne d'une grande centrale photovoltaïque au sol déployée sur une plaine, en bordure d'un site industriel

HelioGround is the all-terrain two-post ground-mounted structure in the EnerGround range, designed for the adaptability and durability of Ecostal Engineering’s ground-mounted PV plants.

Vue aérienne d'un chantier de centrale photovoltaïque au sol, grue et tables de modules en cours de pose

An all-terrain two-post structure

Its “tube-in-tube” sliding system adapts to the most demanding soils and topographies. It allows infinitely adjustable height and tilt, and even compensates for differential settlement occurring during operation.

Ground screws and concrete ground beams can be combined on the same table. The modules slide onto rails and are clamped from below: installation is fast, safe and ergonomic, with minimal shading behind the modules, ideal for bifacial panels.

HelioGround can be installed on three types of foundation, chosen according to ground conditions: ground screws, ball-joint feet on ground beams and driven piles.

Vis de fondation en cours de pose au bord de l'eau, au coucher du soleil

Ground screws

Faster, more efficient, safer. Ground screws are particularly versatile. Made from hot-dip galvanised steel to resist corrosion, they suit all soil types: topsoil, clay, chalk, concrete, and rock with pre-drilling. Highly resistant, they are stable and durable, and withstand extreme vertical and horizontal loads.

This solution requires no earthworks, no excavation and no concrete. Quick to install, it causes no soil damage or soil sealing and remains fully reversible. The screws can be loaded immediately and no earthing connection is needed.

We keep a large stock of ground screws, which shortens site start-up times.

The benefits of ground screws

  • Saves time
    and money: can be loaded immediately
  • No impact
    no earthworks, no excavation, no concrete
  • Reversible
    and easy to remove
  • All soil types
    and all weathers: rain, frost, snow
  • Tested and approved
    by numerous bodies
  • Hot-dip galvanised
    steel, to DIN EN ISO 1461
Rangée de structures photovoltaïques posées sur des longrines en béton, sur un sol sablonneux

Ball-joint feet on ground beams

The answer to differential settlement. This foundation is used where digging is not possible: backfilled land, engineered landfill sites, buried services. The ball-joint feet rest on ground beams and allow an inclination of up to 10%. The structure thus compensates for uneven ground and differential settlement. Thanks to the telescopic height adjustment of the feet, it adapts as the ground changes over time.

  • Ideal for engineered landfill sites
  • Compensates for uneven ground, with an inclination of up to 10%
  • Compensates for differential settlement
  • Two possible adjustments: tilt and height
Pieu battu unique supportant une structure photovoltaïque, vu sous les modules

Driven piles

Cost-effective, quick and easy to install. Driven piles are suited to stable soils. Because they need no accessories and are easy to assemble, they are particularly cost-effective and quick to install. They offer better shear resistance than ground screws, which allows wider spacing between piles, and a single central pile can even be used for smaller structures that would normally need at least two screws.

Like ground screws, driven piles have no impact on the soil, are completely reversible and are removed simply by pulling them out. On hard or corrosive soils, ground screws keep the edge: being shorter, they have a smaller surface area to treat, and they are adjustable.

  • Cost-effective: no accessories, less material
  • Fast installation
  • Excellent shear resistance, for wider spacing between piles
  • Can be used as a single central pile
  • No impact on the soil
  • Reversible solution
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    Deux membres de l'équipe Ecostal Engineering consultent un plan au milieu de panneaux solaires

    Let’s talk about your project

    Topsoil, clay, chalk, rock, backfilled land or engineered landfill site: we study your soil and the constraints of your site to select the right foundation.

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