Agrivoltaics: designing for the crop and the panel
Energy and farming can share one field — but only if the design starts with the crop. The trade-offs, and how to measure whether it worked.
Agrivoltaics puts solar generation and agriculture on the same land. Done well, the land produces food and electricity, and the panels can even help the crop. Done badly, you lose yield, block machinery, and end up with an expensive solar farm with a few weeds underneath.
The difference is design — and the design should start with the crop, not the panel.
Start with the farm
Before a layout exists, answer the farming questions:
- Which crop, and how sensitive is it to shade? Light needs vary widely. Shade-tolerant crops such as many leafy vegetables, some herbs, and forage generally cope with partial shade better than light-hungry crops. Results are crop-specific and climate-specific, so trial before scaling.
- What machinery will work here? Tractors, sprayers, and harvesters need clearance and turning space.
- What is the water situation? Irrigation method, water source, and how rainwater will behave around panels.
- What are the farmer's priorities? If the electricity pays for the farm, the crop can be secondary. If the crop is the business, the panels must serve it.
The main design variables
- Mounting height and span. Elevated systems leave room for machinery and light underneath. Height raises structural cost, so it is a trade-off, not a default.
- Row spacing and ground coverage. More space between rows means more light for crops and fewer panels per hectare. Spacing is the main dial between "mostly farm" and "mostly power."
- Orientation and tilt. Fixed tilt is simple. Tracking systems can be tuned to adjust the shade pattern over the season or the day, at higher cost and complexity. Vertical bifacial arrangements use narrow strips of land and leave wide lanes for crops.
- Panel layout. Gaps or semi-transparent modules let more diffuse light through.
Why the crop can benefit
In hot, dry climates, partial shade can reduce heat stress on plants and slow evaporation from the soil, and studies have reported lower irrigation demand for some crops under panels. The effect depends heavily on crop, climate, and design, so it is something to measure on your site rather than assume.
Details that are easy to miss
- Rainwater concentrates at panel edges. Without drainage planning, repeated dripping causes erosion and uneven soil moisture.
- Soil during construction. Heavy equipment compacts soil. Plan routes and restore structure afterward.
- Cleaning and maintenance access for the panels, without trampling the crop.
- Wind and snow loads on taller structures.
- Cable routing and grounding that do not interfere with tillage.
Measure the combined result
The standard yardstick is the Land Equivalent Ratio (LER):
LER = (crop yield under panels ÷ crop yield in full sun) + (electricity per hectare in the combined system ÷ electricity per hectare from a normal solar plant)
A value above 1 means the combined system uses the land more productively than growing the two separately. It forces an honest accounting of what is gained and what is given up.
To compute it — and to improve the system season by season — you need to monitor both sides:
- Electricity generated and consumed
- Soil moisture and temperature under and between panels
- Light reaching the crop
- Water applied to each zone
- Yield per zone, harvested and recorded
When these live on one dashboard, the farmer and the energy operator are looking at the same field.
Check the rules early
Land-use law for agrivoltaics is changing in Albania. A 2026 amendment now allows agrivoltaics on agricultural land under conditions the government is still to define — see our article on what to check before you build.
Energy generation and farming coexist — intelligently.
Our planned agrivoltaic pilot is built around exactly these questions: design the solar around the farm, then measure both.