At Intersolar Europe 2026, a theme kept surfacing in conversations with tracker manufacturers and field engineers: design decisions are no longer judged on energy yield alone. On sites with variable topography, they are judged just as much on earthworks volume, terrain adaptation, and total CAPEX. The tracker you choose is now partly a civil-engineering decision.
Earthworks is one of the largest variable costs
Grading is among the largest and least standardized line items in utility-scale construction. As PV Tech puts it, “unlike modules or trackers, there’s no catalogue for how much dirt should be moved and where.” A single 200 MW AC project’s earthwork can range from 10,000 cubic yards to over 500,000, with costs from 50,000 to 2.5 million US dollars. Internal soil movement runs about 4 to 5 dollars per cubic yard; external hauling 15 to 30. Two documented projects make the spread concrete: a Georgia site was cut from 320,000 to 190,000 cubic yards (roughly 50%, about 650,000 dollars saved), and a Texas site from 650,000 to 193,000 cubic yards (roughly 70%, over 950,000 dollars and 57 workdays saved).
The point is that the same nameplate capacity can carry wildly different civil cost, depending on how the layout meets the ground.
Single Row vs Terrain Following, in one line each
A Single Row Tracker holds long, continuous rows on a near-single plane. A Terrain Following Tracker conforms to the north-south undulations of the ground. On flat sites the distinction barely matters. On rolling or broken terrain, continuous rows have to reconcile their length with a moving ground line, and that reconciliation is paid for in cut and fill.
The cost hides in the section view
In plan view, both layouts can look fine. The earthwork penalty only becomes visible in section, where the vertical gap between the design profile and the existing ground is what gets filled with excavation. As that gap grows, volume grows with it, and it grows fastest exactly where the slope changes. This is why a layout can pass a plan-view review and still ship a six-figure earthwork surprise to the field.
The terrain-following tracker landscape
Terrain-following is now a recognized hardware category. Nextracker’s NX Horizon-XTR reports 30% to 90% less tracker-related grading on undulating terrain, 1,000 to 3,000 cubic yards per MW of earthwork savings, and piles up to about a metre shorter. Nevados’ TRACE All Terrain Tracker handles slopes up to 37% with 15 degrees of pile-to-pile articulation. GameChange’s Genius Tracker TF and Array’s OmniTrack round out the field.
These are tracker manufacturers, not PVX competitors. PVX.Cad is CAD software. Whatever tracker you specify, the open question is the same: how much earthwork does this architecture actually cost on your terrain, and can you see that number before you commit? That is the gap PVX.Cad fills. It models cut and fill for any tracker architecture on the real 3D site surface, so the earthwork figure becomes a design output rather than a construction surprise.
A worked example: 458k to 180k m³
We ran the comparison on one real site, holding topography, boundaries, layout criteria, and project assumptions constant, and changing only the tracker architecture. The Single Row scenario required 458,592 m³ of cut. The Terrain Following scenario required 180,254 m³, about 60% less, on the same ground.
That figure sits squarely inside the 30% to 90% range tracker manufacturers report for cut-and-fill reduction on challenging sites, which is a useful reality check: the savings are real, and they are bounded by how variable the terrain actually is. See the full breakdown, with the section views and cut and fill tables, in the Terrain Following vs Single Row Tracker case study.
When it helps, and when it does not
None of this makes terrain-following the right answer everywhere. On flat or gently sloped sites the earthwork difference is small, and a Single Row layout may be simpler and cheaper to build. The decision is site-specific, which is exactly the argument for quantifying it. The only way to know whether tracker architecture moves your CAPEX is to model both options on your actual terrain and read the cut and fill off the same data model.
Bring your terrain
Book a demo with your terrain file and we will model the earthwork delta between tracker architectures on your site, in the same session.
