A promising sustainability trend emerging in 2026 combines two environmental technologies: agrivoltaics and phytoremediation. The goal is to place solar panels above carefully selected plants that can help remove, stabilize, or contain contaminants in the soil.
This approach could allow certain polluted or underused properties to generate renewable electricity while undergoing a gradual, plant-based soil restoration process. Instead of using land for only one purpose, an agrivoltaic-phytoremediation project could potentially produce energy, grow useful biomass, and improve environmental conditions at the same time.
What Is Agrivoltaics?
Agrivoltaics is the practice of using the same land for both solar power generation and plant production. Solar panels may be elevated above crops, arranged in spaced rows, or designed with semi-transparent materials that allow some sunlight to reach the plants below.
The shade produced by solar panels changes conditions at ground level. Depending on the climate, plant species, and panel design, partial shade may reduce daytime heat, slow soil-moisture loss, and protect plants from extreme weather.
However, the results are not automatically positive. Too much shade can reduce plant growth, while the wrong panel height or spacing can make planting, harvesting, and maintenance difficult. Each project must therefore be designed around its location and intended purpose.
How Does Phytoremediation Work?
Phytoremediation uses plants and their root systems to help manage pollutants in soil or water. Different species perform different functions. Some plants absorb contaminants and store them in their roots, stems, or leaves. Others stabilize pollutants in the soil, reducing the chance that they will spread through dust, erosion, or water.
The technique is often considered less disruptive than excavating contaminated soil and transporting it to a landfill. It may also preserve soil structure and provide vegetation cover while remediation is underway.
Phytoremediation is not an instant cleanup method. It may require several growing seasons, repeated harvesting, soil testing, and controlled disposal or processing of contaminated plant material.
What the New 2026 Research Explored
A 2026 study titled Phytoremediation-Agrivoltaic Systems for PTEs Decontamination developed a framework for combining solar technology with plants selected to remediate soil containing potentially toxic elements, also known as PTEs.
The researchers used an industrially contaminated area in Augusta, Sicily, as a representative case study. They evaluated plant selection, photovoltaic configurations, shade-related changes in biomass production, potential electricity generation, and estimated financial returns.
Three modeled combinations were examined:
- Monofacial solar panels with Arundo donax, commonly called giant reed
- Bifacial solar panels with Chrysopogon zizanioides, commonly called vetiver grass
- Semi-transparent solar panels with Cannabis sativa, or industrial hemp
The monofacial-panel and giant-reed configuration produced the highest modeled annual electricity output at approximately 568,660 kilowatt-hours. The bifacial-panel and vetiver configuration produced the greatest modeled biomass yield and the highest estimated net return per hectare.
These results do not prove that one combination will be best everywhere. Instead, the research shows that the preferred design depends on whether a project prioritizes electricity generation, plant growth, soil remediation, biomass production, or financial performance.
A New Use for Contaminated and Marginal Land
One of the most important potential benefits is the productive reuse of land that may not be suitable for growing food. Former industrial properties, mining areas, brownfields, and other contaminated locations can remain unused for many years because conventional cleanup is expensive.
A properly designed agrivoltaic-phytoremediation system could generate solar electricity during the lengthy remediation period. Revenue from the solar installation might help offset monitoring, maintenance, irrigation, harvesting, and soil-testing expenses.
This may be particularly valuable in areas where large solar projects compete with productive farmland. Directing some solar development toward contaminated or marginal properties could reduce pressure to remove high-quality agricultural land from food production.
Why Food Crops Require Special Caution
Plants grown on contaminated land must not automatically enter the human or animal food supply. A plant may absorb metals or other pollutants into its roots, stalks, leaves, or seeds. Testing and regulatory oversight are therefore essential.
Non-food plants, industrial crops, grasses, fiber crops, and dedicated biomass species may be more appropriate for some projects. Even then, the harvested material must be tested and handled safely. Burning or processing contaminated biomass without proper controls could release or concentrate the pollutants rather than eliminate them.
Important 2026 Agrivoltaics Trends
1. Solar Projects Designed Around Plant Requirements
Developers are increasingly evaluating panel height, spacing, tracking, transparency, and orientation according to the needs of the vegetation below. Agrivoltaic design is becoming more site-specific instead of treating plants as simple ground cover.
2. Greater Use of Bifacial and Semi-Transparent Panels
Bifacial panels can collect light on both sides, while semi-transparent panels allow part of the sunlight to pass through. These technologies give designers more options for balancing electricity generation with plant growth.
3. Productive Reuse of Brownfields
Contaminated and abandoned properties are receiving attention as possible locations for renewable energy. Combining solar generation with phytoremediation could give landowners an economic reason to begin restoring difficult sites.
4. Data-Driven Crop Selection
Future projects are likely to use soil sensors, weather information, contamination maps, plant-growth measurements, and solar-production data to determine which plant and panel combinations perform best.
5. Biomass as a Potential Secondary Product
Researchers are studying whether safely managed plant material could be used for fiber, industrial products, controlled energy production, or other non-food purposes. The correct option depends on the pollutants accumulated by the plants and applicable environmental regulations.
Challenges That Still Need to Be Addressed
Although the concept is promising, several questions remain:
- How quickly will the selected plants reduce contamination under real field conditions?
- How does solar-panel shade affect contaminant uptake over multiple growing seasons?
- What is the safest and most economical way to process contaminated biomass?
- Who is responsible for long-term soil testing and environmental compliance?
- Can the combined system remain financially viable when construction and maintenance costs are included?
The 2026 study is best understood as a modeled framework and techno-economic assessment, not proof that every contaminated site can be completely cleaned using plants and solar panels. Field trials and long-term monitoring will be necessary before the approach can be adopted widely.
The Future of Solar-Powered Land Restoration
Agrivoltaic phytoremediation represents a shift from single-purpose land use toward multifunctional environmental design. A contaminated property could potentially become a source of renewable electricity while plants gradually stabilize or extract pollutants from the soil.
The most successful projects will require cooperation among solar developers, farmers, soil scientists, engineers, environmental regulators, and local communities. Careful site testing must come before selecting the plants or designing the solar array.
As research continues through 2026 and beyond, agrivoltaics may become more than a way to combine farming with solar energy. It could also become a valuable tool for restoring damaged land, producing useful biomass, and helping communities turn environmental liabilities into cleaner, more productive properties.
Frequently Asked Questions
Can solar panels help clean contaminated soil?
Solar panels do not directly remove soil contaminants in this type of system. They generate electricity and create a modified growing environment, while specially selected plants perform the phytoremediation work.
How long does phytoremediation take?
The timeline can range from several growing seasons to many years. It depends on the contaminant, its concentration and depth, soil conditions, plant species, climate, and remediation goals.
Can crops grown on contaminated land be eaten?
They should not enter the food supply unless extensive testing and environmental authorities confirm that they are safe. Many phytoremediation projects use non-food plants to reduce this risk.
Does shade from solar panels reduce plant growth?
It can. Moderate shade may benefit certain plants in hot or dry climates, while excessive shade may lower biomass production. Panel spacing, transparency, height, and plant selection must be evaluated together.
Is agrivoltaic phytoremediation commercially available?
Its individual components are already used, but combining them as an optimized remediation and energy system remains an emerging field. More field demonstrations are needed to confirm long-term environmental and financial performance.
Sources and Further Reading
- PubMed: Phytoremediation-Agrivoltaic Systems for PTEs Decontamination
- Environmental Science and Pollution Research: Full Study
- National Laboratory of the Rockies: Agrivoltaics Research