The Complete Guide to Ground-Mount Structures
ENSOL Engineering TeamUpdated 2026-02-253 min read
A ground-mount structure carries a solar array on open land, founded to the soil and engineered for the site's wind loads. This guide covers foundations, coatings, layout and the decisions that make a ground-mount plant reliable for decades.
Key takeaways
- Foundation (pile, pedestal or screw) is chosen from a soil investigation.
- Wind uplift usually governs pull-out capacity.
- HDGI is the usual coating for ground-mount durability; ZAM for coastal.
- Tilt and row spacing balance yield against shading and land use.
Foundations
Driven piles suit good soils; pedestals suit weaker or variable ground; ground screws give quick, low-disturbance installs. A geotechnical investigation provides bearing and pull-out capacity — and because wind uplift often governs, pull-out is decisive.
Coating for the environment
Ground-mount steel is exposed to weather, so hot-dip galvanising (HDGI) is the usual choice for long, maintenance-free life. Coastal sites may use ZAM for its self-healing cut edges. Coating thickness should be verified to IS 4759 / ISO 1461.
Tilt and layout
Fixed tilt is set for the latitude; row spacing (pitch) limits inter-row shading; ground coverage ratio balances output against land. Trackers can raise yield where the site and budget suit.