Case study: Agrivoltaics & dual-use farmland — a startup-to-enterprise scale story

Agrivoltaics, the co-location of solar photovoltaic systems and agricultural production on the same land, has evolved from a niche academic concept into a rapidly scaling commercial sector. The idea that farmland could simultaneously produce food and clean electricity was first formally proposed by Adolf Goetzberger and Armin Zastrow at the Fraunhofer Institute for Solar Energy Systems in 1981, but commercial viability remained elusive for decades. The transformation of agrivoltaics from laboratory curiosity to enterprise-scale deployment offers critical lessons for policymakers, investors, and agricultural stakeholders navigating the intersection of food security and energy transition.

Why It Matters

Global farmland is under unprecedented pressure. The United Nations Food and Agriculture Organization estimates that 12 million hectares of productive agricultural land are lost annually to degradation, while electricity demand is projected to increase 25-30% by 2035. Traditional utility-scale solar installations compete directly with agriculture for land, a tension that has generated significant political backlash in regions such as the US Midwest, parts of Germany, and Japan. Agrivoltaics resolves this conflict by enabling land to serve both purposes simultaneously, with documented land use efficiency gains of 60-70% compared to separate agricultural and solar installations.

The economic case has strengthened considerably. Fraunhofer ISE's 2025 analysis found that agrivoltaic systems generate combined revenues (crops plus electricity) of $3,200-5,800 per hectare annually, compared to $1,400-2,800 for crops alone. The Inflation Reduction Act's Investment Tax Credit provides up to 30% for solar installations, with an additional 10% bonus for projects sited on brownfields or in energy communities, and the USDA's Rural Energy for America Program (REAP) provides grants covering up to 50% of project costs for qualifying agricultural producers. In the European Union, the revised Common Agricultural Policy allows member states to count agrivoltaic installations toward renewable energy targets while maintaining agricultural subsidy eligibility, a policy change that has accelerated adoption across France, Germany, and Italy.

The climate implications are substantial. A 2025 study published in Nature Energy estimated that deploying agrivoltaics on just 1% of global cropland could generate approximately 2,400 TWh of clean electricity annually, equivalent to roughly 8% of global electricity demand, while maintaining or improving agricultural productivity on the same land.

Key Concepts

Elevated Agrivoltaic Systems mount solar panels at heights of 3-5 meters above ground level, allowing conventional farming equipment to operate beneath the array. These systems, pioneered commercially in France and Japan, preserve full mechanized farming capability at the cost of higher structural expenditure. Panel spacing and tilt angles are optimized to balance light transmission for crops with electricity generation. Typical systems transmit 60-75% of incident solar radiation to the crops below, sufficient for most shade-tolerant and semi-shade-tolerant species.

Interrow Agrivoltaic Systems place standard ground-mounted solar panels in rows with wider spacing than conventional solar farms, allowing crop cultivation between the rows. While less expensive to install than elevated systems, interrow configurations reduce the cultivable area by 30-50% and limit compatible crops to those tolerant of partial shading patterns that change throughout the day and across seasons.

Crop Selection and Microclimate Effects represent perhaps the most consequential technical dimension. Solar panels create modified microclimates beneath and between arrays, reducing soil temperature by 2-5 degrees Celsius, decreasing evapotranspiration by 15-30%, and reducing wind exposure. These effects are beneficial for many crops in hot, arid conditions but detrimental for crops requiring maximum solar exposure. Research at the University of Arizona's Biosphere 2 demonstrated that certain crops, including lettuce, peppers, and tomatoes, actually increased yields by 65-100% under agrivoltaic panels in desert conditions due to reduced heat stress and water savings.

Bifacial Panel Technology has become a significant enabler for agrivoltaics. Bifacial panels generate electricity from both direct and reflected sunlight, capturing an additional 10-25% of energy from light reflected off crops and soil beneath the array. This technology partially compensates for the wider panel spacing required in agrivoltaic configurations and has become standard in most commercial deployments since 2023.

The Startup-to-Enterprise Journey

Phase 1: Technology Validation (2015-2019)

The modern agrivoltaics industry traces its commercial origins to several simultaneous pilot programs. In Japan, the Ministry of Agriculture, Forestry and Fisheries issued guidance in 2013 permitting solar panel installation on agricultural land under specific conditions, including the requirement that crop yields remain above 80% of pre-installation levels. This regulatory clarity catalyzed early commercial activity by companies such as Sustainergy, which deployed small-scale systems across rice paddies and tea plantations in Chiba Prefecture. By 2018, Japan had over 2,000 agrivoltaic installations totaling approximately 650 MW, providing empirical data that proved commercial feasibility.

In Europe, Fraunhofer ISE launched the APV-RESOLA research project near Lake Constance in Germany in 2016, installing an elevated agrivoltaic system over winter wheat, potatoes, celeriac, and clover grass. The three-year trial demonstrated that combined land use efficiency increased by 60-86% depending on crop type and weather conditions, with total revenue per hectare exceeding conventional farming by 2.4 times. These results were published in peer-reviewed journals and became foundational data for subsequent commercial ventures.

Sun'Agri, founded in France in 2009, spent nearly a decade developing dynamic agrivoltaic systems with panels that adjust tilt in real time to optimize the balance between crop protection and electricity generation. Their vineyard installations demonstrated that intelligent shading could reduce irrigation water requirements by 12-34% while protecting grapes from sunburn damage during heat waves, an increasingly valuable capability as Mediterranean climate zones shift northward.

Phase 2: Commercial Scaling (2019-2023)

The transition from pilot to commercial deployment was driven by three converging factors: declining solar panel costs (which fell below $0.20 per watt by 2021), policy support in key markets, and growing investor confidence backed by field trial data.

In the United States, Jack's Solar Garden in Boulder County, Colorado, became a landmark demonstration project in 2021. Operated by the National Renewable Energy Laboratory (NREL) and the Colorado State University, the 1.2 MW installation across five acres of farmland provided rigorous, independently verified data on crop performance under various panel configurations. NREL's findings showed that shade-tolerant crops (lettuce, kale, peppers, and tomatoes) maintained or improved yields under panels, while water use dropped by approximately 20%. The project attracted over $3 million in research grants and became a model for community-supported agrivoltaic development.

In France, the government established a specific regulatory framework for agrivoltaics in the 2023 Energy Acceleration Law, requiring that agricultural production remain the primary use of agrivoltaic land and that systems demonstrate agronomic benefits (improved yields, crop quality, or climate resilience). The legislation was accompanied by feed-in tariffs specifically calibrated for agrivoltaic systems, providing electricity prices of EUR 0.08-0.12 per kWh depending on system capacity, compared to EUR 0.05-0.07 for conventional ground-mounted solar. This premium reflected the higher structural costs of agricultural compatibility.

EDF Renewables, Total Energies, and Engie all launched agrivoltaic business units during this period, each targeting 500-1,000 MW of installed capacity by 2027. EDF Renewables' partnership with Sun'Agri covered over 400 hectares of vineyards, orchards, and vegetable crops across southern France, establishing operational templates for large-scale deployment.

Phase 3: Enterprise Integration (2023-Present)

The current phase is characterized by the emergence of integrated agrivoltaic platforms that combine energy generation, precision agriculture, and financial structuring into scalable business models.

NextEnergy Capital, a renewable energy investment manager with over $5 billion in assets, entered agrivoltaics in 2024 through a dedicated fund targeting 2 GW of capacity across Southern Europe and North Africa. Their approach treats agrivoltaic installations as combined infrastructure assets, bundling power purchase agreements with agricultural lease arrangements that guarantee farmers minimum income regardless of crop yields in the first three years. This financial innovation addressed one of the primary barriers to farmer adoption: the fear that panels would reduce yields without compensating income.

In Italy, Enel Green Power deployed 170 MW of agrivoltaic capacity across 500 hectares in Sicily and Sardinia by 2025, integrating elevated panel systems with sheep grazing, olive cultivation, and legume production. Their data showed that sheep grazing beneath panels reduced vegetation management costs by EUR 200-400 per hectare annually while maintaining healthy pasture productivity. The Italian government's agrivoltaic subsidy program, funded with EUR 1.1 billion from the National Recovery and Resilience Plan, provided additional capital grants covering up to 40% of installation costs.

In the United States, Lightsource bp committed $500 million to agrivoltaic development across ten states, partnering with local agricultural cooperatives to design systems compatible with regional farming practices. Their 200 MW project in Indiana combines pollinator-friendly ground cover with interrow soybean cultivation, generating combined annual revenues that exceed conventional soybean farming by approximately $1,800 per acre.

What Worked

Several factors proved decisive in the sector's scaling trajectory. First, regulatory clarity in early-mover markets, particularly Japan and France, provided the policy foundation that enabled investor confidence. The specific requirement that agricultural production remain primary in France's framework prevented the sector from becoming a loophole for conventional solar development on farmland, which preserved political support. Second, the convergence of detailed agronomic research (from institutions such as Fraunhofer ISE, NREL, and the University of Arizona) with declining hardware costs created a genuine economic value proposition rather than a subsidy-dependent business model. Third, the integration of farmer income guarantees into financial structures directly addressed the primary adoption barrier.

What Didn't Work

Not all approaches succeeded. Early attempts to deploy agrivoltaics over commodity row crops such as corn and soybeans in the US Midwest produced disappointing results, with yield reductions of 15-30% that exceeded the economic value of electricity generated. These crops require maximum solar radiation and cannot tolerate the shading levels created by most panel configurations. Similarly, several Japanese installations faced enforcement actions when operators prioritized electricity generation over agricultural production, allowing crop quality to deteriorate below the 80% yield maintenance threshold. In Germany, permitting delays of 18-36 months for agricultural land conversion discouraged smaller developers, concentrating market activity among large utilities with the resources to navigate complex bureaucratic processes.

Key Metrics

Metric	Early Pilots (2016-2019)	Commercial Scale (2020-2023)	Enterprise Scale (2024-Present)
Installed Capacity per Project	0.1-1 MW	1-50 MW	50-500 MW
LCOE Premium vs. Conventional Solar	+40-80%	+15-30%	+8-15%
Land Use Efficiency Gain	30-60%	50-70%	60-86%
Water Savings (Arid Regions)	10-20%	15-30%	20-35%
Farmer Adoption Rate (Eligible Land)	<0.1%	0.5-2%	3-8%
Average Combined Revenue ($/hectare)	$2,000-3,000	$3,000-4,500	$3,500-5,800

Action Checklist

• Assess regional crop compatibility with agrivoltaic shading using published agronomic trial data from NREL, Fraunhofer ISE, or equivalent research institutions
• Evaluate applicable policy incentives including IRA tax credits, USDA REAP grants, EU CAP eligibility, and national agrivoltaic subsidy programs
• Engage local agricultural extension services to identify shade-tolerant crop varieties suited to regional conditions
• Structure land lease agreements that guarantee minimum farmer income during the initial 3-5 year establishment period
• Specify bifacial panel technology and elevated mounting systems for maximum agricultural compatibility
• Establish independent crop yield monitoring protocols to ensure compliance with regulatory yield maintenance thresholds
• Develop water management plans that leverage reduced evapotranspiration for irrigation savings
• Secure community engagement early to address visual impact and farmland preservation concerns

FAQ

Q: Does agrivoltaics reduce crop yields? A: It depends entirely on the crop species, climate conditions, and system design. In hot, arid environments, shade-tolerant crops such as lettuce, peppers, and certain berries have shown yield increases of 20-100% due to reduced heat stress and water conservation. In temperate climates with lower solar radiation, some crops experience yield reductions of 5-20%. Crops requiring maximum sunlight, including corn and soybeans, typically show yield declines of 15-30% and are generally not suitable for agrivoltaic systems.

Q: What is the typical payback period for an agrivoltaic installation? A: Current enterprise-scale projects in markets with favorable policy support achieve payback in 7-12 years, compared to 5-8 years for conventional ground-mounted solar. The premium reflects higher structural costs for elevated systems and wider panel spacing. However, when combined crop and electricity revenues are considered alongside reduced water costs and policy incentives, the internal rate of return for well-designed projects ranges from 8-14%.

Q: Which crops work best under agrivoltaic panels? A: Research consistently identifies leafy greens (lettuce, spinach, kale), certain fruits (berries, grapes), root vegetables (potatoes, carrots), and herbs as strong performers under agrivoltaic shading. Grazing livestock, particularly sheep, represent another highly compatible agricultural use. The University of Arizona's research also demonstrated excellent results with peppers and tomatoes in desert conditions. Selection should be guided by regional agronomic data rather than generic recommendations.

Q: How does agrivoltaics affect farmland property values and agricultural subsidies? A: In the EU, France and Italy have explicitly preserved CAP subsidy eligibility for agrivoltaic land, provided agricultural production remains primary. In the US, property tax treatment varies by state, but several states (including Colorado, Virginia, and Massachusetts) have enacted legislation classifying agrivoltaic land as agricultural for tax purposes. Farmland with agrivoltaic installations has generally maintained or increased property values due to the dual income stream, though long-term data remains limited.

Sources

• Fraunhofer Institute for Solar Energy Systems. (2025). APV-RESOLA: Agrivoltaics Research on Land Use Optimization, Final Report 2016-2025. Freiburg: Fraunhofer ISE.
• Barron-Gafford, G.A. et al. (2019). "Agrivoltaics provide mutual benefits across the food-energy-water nexus in drylands." Nature Sustainability, 2(9), pp. 848-855.
• National Renewable Energy Laboratory. (2024). InSPIRE: Innovative Solar Practices Integrated with Research and Education, Jack's Solar Garden Results Summary. Golden, CO: NREL.
• Trommsdorff, M. et al. (2022). "Agrivoltaics: Opportunities for Agriculture and the Energy Transition." Fraunhofer ISE Study Report. Freiburg: Fraunhofer ISE.
• International Renewable Energy Agency. (2025). Renewable Energy and Agri-Food Systems: Advancing Energy Transitions Alongside Food Security. Abu Dhabi: IRENA.
• European Commission. (2024). Agrivoltaics in the Common Agricultural Policy: Implementation Guidance for Member States. Brussels: EC Directorate-General for Agriculture.
• Dupraz, C. et al. (2024). "Combining solar photovoltaic panels and food crops for optimising land use: Towards new agrivoltaic schemes." Renewable and Sustainable Energy Reviews, 196, 114357.
• US Department of Agriculture. (2025). Rural Energy for America Program: Agrivoltaic Project Eligibility and Grant Parameters. Washington, DC: USDA.