The case for agrivoltaics is now widely accepted. Placing solar panels over farmland can produce clean power while keeping land in agricultural use, and in hot, dry regions the shade can even protect crops. What is less widely understood is that the outcome depends almost entirely on the structure. The same field can produce a strong harvest or a disappointing one depending on how high the panels sit, how they are spaced, whether they move and how farm machinery gets underneath them.
As agrivoltaics moves beyond demonstration sites into commercial projects, mounting design has become the deciding factor for both crop yields and project economics. This article looks at the main structure types, what recent research shows about their trade-offs, and what developers and investors should look for.
Four Structure Families, Four Different Bargains
Agrivoltaic installations fall broadly into four structural families, and each strikes a different balance between energy, crops and cost.
- Elevated fixed structures lift panels high enough, often three to five meters, for crops to grow and machinery to work beneath them. They suit orchards, vineyards and high-value horticulture, but they need far more steel and stronger foundations.
- Elevated or adapted single-axis trackers rotate the panels through the day. They can be raised, widely spaced or controlled to change how much shade reaches the crop.
- Vertical bifacial systems stand panels upright in rows, usually facing east and west, leaving wide strips of open land between them for arable farming and grazing.
- Greenhouse and covered systems integrate panels into protected cropping structures, a smaller but distinct segment.
There is no single best design. The right structure depends on the crop, the climate, the farming operations and the policy framework that governs how the project is paid for.
Height and Spacing Decide What Grows Underneath
Recent field research makes the importance of structure very clear. A study of lettuce in Fresno, California, compared ground-mounted and elevated systems, both fixed and tracking. Raising the panels proved to be the single most important factor in lettuce yield, with tracking adding a smaller benefit. The elevated tracking design caused the smallest yield loss compared with open-field growing, and its clearance was high enough for standard tractors to pass underneath, so the farm could keep its usual harvesting methods.
Results are not always positive. A long-term study of pears in Australia, published earlier this year, found that panels improved protection from extreme weather but could reduce fruit yield and quality, and that panel tilt changed the balance between energy output and crop performance. The lesson is not that agrivoltaics fails in orchards. It is that structure and panel geometry have to be designed around the specific crop rather than adapted from a standard solar layout.
Machinery Access Is an Underrated Design Constraint
Crops are only part of the farming system. Tractors, sprayers and harvesters need room to turn and pass, and a structure that ignores them can quietly undermine the farm's productivity. Research on processing tomatoes across five Italian locations, completed in April, found that without deliberate co-design, the field efficiency of agricultural machines can fall by as much as 45 percent. Single-axis trackers often delivered the most energy, but elevated or wide-spaced layouts preserved the most flexibility for farm operations.
This is why the most successful projects involve the farmer from the start. Row spacing, post placement and clearance height all need to match the equipment the farm actually uses, not the equipment a solar engineer assumes it uses.
The Steel Premium and Who Pays for It
The central commercial challenge of agrivoltaic structures is cost. Elevated designs need much more steel than ground-mounted solar. Tracker suppliers surveyed this year noted that elevated agrivoltaic trackers can require three to four times as much steel as standard installations, while confirming that policy incentives, particularly in Europe, help cover the premium.
The cost gap varies widely by design. Work by Germany's Thünen Institute, discussed widely this spring, found that the highest cost premiums apply to elevated systems used in specialized settings such as orchards, while vertical systems can cost only slightly more than conventional ground-mounted solar and tracker-based systems sit in between. The same analysis showed that vertical and tracker designs keep most of the land in agricultural use. Tracker systems can also earn more per unit of electricity because they generate more power in the morning and evening, when prices are often higher.
For developers, the implication is that structure choice should follow the revenue model. Where tariffs or incentives specifically reward agrivoltaics, elevated systems over high-value crops can make sense. Where projects compete on wholesale power prices, vertical and tracker-based designs over arable land and pasture are usually easier to finance.
Beyond Shade, Structures as Crop Protection
A newer line of thinking treats the structure as active crop protection. Researchers at Cornell University published work this spring showing how tracker-based agrivoltaic arrays can reduce wind exposure across fields, potentially replacing traditional tree windbreaks that take land out of production. Combined with tracker control strategies that adjust panel angles for hail, frost or heat, this points toward structures that respond to what the crop needs on a given day, not just to the position of the sun.
This capability could become a key differentiator. A structure that protects a high-value crop from hail or heat stress adds value that a simple shade calculation does not capture.
What Developers and Investors Should Look For
- Crop-first design. Projects designed around a specific crop and farming system consistently outperform standard solar layouts lifted off the ground.
- Machinery compatibility. Clearance, spacing and post layout should be confirmed against the farm's actual equipment before construction.
- Steel and foundation costs. These are the largest variables in structure economics and should be tested carefully against the incentive or tariff available.
- Agricultural performance monitoring. Regulators in several markets now require evidence that farming continues under the panels. Projects that measure crop output from day one are better protected.
- Supplier specialization. Tracker and structure suppliers with dedicated agrivoltaic products and field references reduce design risk.
Agrivoltaics is moving past the question of whether solar and farming can share land. The question now is how to build the structure so that both actually perform. The projects that get the structure right will make the strongest case for dual land use, and the suppliers that specialize in those structures are likely to lead the next phase of the market.