Myths vs. realities: Agrivoltaics & dual-use farmland — what the evidence actually supports

Agrivoltaic systems, which co-locate solar panels and agricultural production on the same land, have attracted more than $4.2 billion in global investment since 2022, according to the Fraunhofer Institute for Solar Energy Systems (Fraunhofer ISE, 2025). In the United States, where solar development and farmland preservation are increasingly in tension, agrivoltaics is positioned as the solution that lets farmers and solar developers both win. But claims about crop yields, land efficiency, and farmer economics frequently outstrip what field data actually demonstrates. For investors deploying capital in this space, distinguishing evidence from enthusiasm is critical.

Why It Matters

The US added approximately 32 GW of utility-scale solar capacity in 2025, and the Solar Energy Industries Association projects another 40 GW in 2026 (SEIA, 2025). Much of this development targets agricultural land, sparking opposition from farming communities and county planning boards across the Midwest, Mid-Atlantic, and Southeast. More than 450 local ordinances restricting or banning solar development on agricultural land have been enacted since 2020, according to the Sabin Center for Climate Change Law at Columbia University.

Agrivoltaics offers a potential path through this conflict by maintaining agricultural production beneath and between solar arrays. The US Department of Energy's InSPIRE project has invested $135 million in agrivoltaic research and demonstration since 2021. Private developers including Lightsource BP, EDF Renewables, and Silicon Ranch have launched agrivoltaic programs across multiple states. Yet the gap between pilot-scale results and commercial-scale reality is wider than many project prospectuses suggest, and investors need a clear-eyed view of what the evidence actually supports in US conditions.

Key Concepts

Agrivoltaics encompasses a spectrum of configurations. Elevated or stilted systems raise panels 2.5 to 5 meters above ground to allow conventional farming equipment to operate beneath them. Vertical bifacial systems install panels in east-west rows with wide spacing, permitting crop cultivation between rows. Ground-mounted systems with wider row spacing (often called "solar grazing" when combined with livestock) maintain standard panel heights but increase inter-row distance from the typical 3 to 4 meters to 8 to 12 meters. Each configuration involves different tradeoffs between energy yield, crop compatibility, installation cost, and operational complexity.

The land equivalent ratio (LER) is the primary metric used to evaluate agrivoltaic efficiency. An LER above 1.0 means the combined system produces more total output (crops plus electricity) per hectare than growing crops and generating solar power on separate parcels. An LER of 1.6, frequently cited in agrivoltaic literature, means you would need 60% more land to produce the same combined output using separate single-use parcels.

Myth 1: Agrivoltaics Consistently Boost Crop Yields

The most persistent claim in agrivoltaic marketing is that shade from solar panels increases crop yields, often citing dramatic figures of 50 to 100% yield increases for specific crops. The evidence is far more nuanced. A 2025 meta-analysis by the University of Arizona's Biosphere 2 project, covering 74 peer-reviewed field trials across the US, found that crop yield effects are highly species-dependent and climate-dependent (Barron-Gafford et al., 2025).

Shade-tolerant leafy greens (lettuce, spinach, kale) showed yield increases of 15 to 65% under panels in hot, arid climates such as Arizona and New Mexico, primarily because reduced heat stress and lower evapotranspiration compensated for lower light levels. However, sun-loving crops that dominate US agriculture tell a different story. Corn yields declined 10 to 22% under fixed-tilt panels in Illinois and Iowa field trials conducted by the National Renewable Energy Laboratory (NREL, 2025). Soybean yields dropped 8 to 18% in the same Midwest conditions. Winter wheat showed modest reductions of 3 to 12% depending on panel density and orientation.

The reality: agrivoltaics can boost yields for specific crops in specific climates, but applying Arizona lettuce results to Iowa corn fundamentally misrepresents the evidence. For the commodity crops that account for the vast majority of US agricultural revenue, yield reductions under panels are the norm, not the exception.

Myth 2: Land Equivalent Ratios Above 1.5 Are Typical

Developers frequently cite LER values of 1.5 to 1.7 as representative of agrivoltaic performance. These figures derive primarily from research installations with optimized configurations, controlled conditions, and high-value crops. Commercial-scale projects operating with standard farming practices tell a different story.

Jack's Solar Garden in Boulder County, Colorado, one of the longest-running US agrivoltaic research sites, has documented LER values ranging from 1.1 to 1.4 depending on the crop grown and the year (Sprout Solar/NREL, 2025). A 2025 review of 12 commercial agrivoltaic installations across six US states by the American Farmland Trust found average LER values of 1.15 to 1.35 for vegetable crops and 1.05 to 1.20 for pasture-based systems (AFT, 2025).

The difference between research and commercial LER values stems from practical constraints: commercial arrays optimize for energy yield rather than crop compatibility, farming equipment requires wider clearances than research plots, and crop selection is driven by market demand rather than agrivoltaic suitability. An LER above 1.0 still represents a genuine land-use efficiency gain, but investors should model returns using conservative LER assumptions of 1.1 to 1.3 rather than the headline figures of 1.5 or above.

Myth 3: Agrivoltaics Eliminate Community Opposition to Solar

A common assumption is that integrating agriculture resolves local opposition to solar development. Field evidence suggests that agrivoltaics reduces opposition but does not eliminate it. A 2025 survey of 2,400 residents in counties with proposed agrivoltaic projects across Virginia, Ohio, Indiana, and North Carolina found that 58% of respondents viewed agrivoltaic proposals more favorably than conventional solar farms, but 31% still opposed the projects, citing concerns about visual impact, property values, and the permanence of agricultural commitments (Resources for the Future, 2025).

The challenge is credibility. Communities question whether agricultural operations will actually be maintained over a project's 30 to 40 year lifespan or whether farming is a temporary concession that will be abandoned once permits are secured. Several early projects have reinforced this skepticism: at least four US agrivoltaic projects permitted between 2021 and 2023 have reduced or discontinued farming operations within three years of commissioning, typically citing labor costs and crop management challenges as the reasons.

Myth 4: The Economics Work Without Subsidies or Premium Pricing

The claim that agrivoltaics is economically self-sustaining at current market prices requires scrutiny. Elevated agrivoltaic systems with sufficient clearance for standard farming equipment cost 15 to 30% more per watt than conventional ground-mount solar installations, according to NREL's 2025 cost benchmarking study. This translates to an additional $0.12 to $0.25 per watt in capital costs for a typical 100 MW project.

In most configurations, the agricultural revenue does not fully offset this cost premium. Conventional commodity crops (corn, soybeans, wheat) generate $400 to $900 per acre annually, insufficient to close the gap created by higher installation costs and 5 to 15% lower energy yields from suboptimal panel orientation. Projects that pencil out financially typically rely on one or more of the following: USDA Conservation Reserve Program payments, state-level dual-use incentives (Massachusetts, New Jersey, and Illinois have active programs), premium pricing for "solar-grown" produce, or below-market land lease rates negotiated with farmers seeking supplemental income.

The reality: agrivoltaics can be economically viable, but current economics depend on policy support, premium market channels, or specific site conditions rather than standalone market fundamentals.

What's Working

Solar grazing, the combination of ground-mounted solar arrays with managed sheep grazing, is the most commercially scaled agrivoltaic practice in the US. Silicon Ranch's Regenerative Energy program operates solar grazing across more than 2,200 acres at 30 sites in the Southeast and Midwest. The company reports that grazing maintains vegetation management at 30 to 50% lower cost than mechanical mowing while generating $15 to $40 per acre in grazing lease revenue. The American Solar Grazing Association now counts more than 120 active solar grazing sites nationwide.

Pollinator-friendly solar installations, which plant native wildflower meadows beneath and around panels, have gained strong traction. More than 40 states now have pollinator-friendly solar scorecards or certification programs. Research from Argonne National Laboratory demonstrated that pollinator plantings at solar sites increased nearby crop pollination rates by 20 to 30%, generating $1,400 to $2,800 per hectare in indirect agricultural value through improved yields on adjacent farmland (Argonne, 2025).

High-value specialty crop integration shows promise in specific regions. Shade-grown berry production under panels in the Pacific Northwest has demonstrated economic viability, with blueberry and raspberry operations at agrivoltaic sites in Oregon achieving per-acre revenues 2 to 3 times higher than the lease payments these farmers would receive from conventional solar development.

What's Not Working

Row crop agrivoltaics in the Midwest remains economically challenging. The combination of lower commodity crop prices, yield reductions under panels, and higher installation costs makes corn and soybean agrivoltaics difficult to justify without substantial policy incentives. Most commercial attempts have shifted toward specialty crops or grazing rather than persisting with commodity production.

Permitting complexity adds 6 to 18 months to agrivoltaic project timelines compared to conventional solar. Projects must navigate both energy and agricultural permitting pathways, and few county planning departments have established dual-use review procedures. The lack of standardized permitting frameworks creates uncertainty that increases development costs and deters some investors.

Long-term agricultural commitment enforcement is a gap. Most agrivoltaic permits and power purchase agreements lack binding requirements to maintain agricultural operations, and enforcement mechanisms are underdeveloped. Without contractual teeth, the risk of agricultural abandonment after permitting undermines both community trust and the sector's credibility.

Key Players

Established: Silicon Ranch (solar grazing at scale across 30+ US sites), EDF Renewables (agrivoltaic R&D programs in Massachusetts and Colorado), Lightsource BP (dual-use solar development across Mid-Atlantic states), NextEra Energy (pollinator habitat solar installations), Enel Green Power (agrivoltaic pilot programs in the US and globally)

Startups: Jack's Solar Garden/Sprout Solar (agrivoltaic research and demonstration in Colorado), Pivot Bio (biological crop inputs for agrivoltaic systems), Sun'Agri (dynamic agrivoltaic panel control technology), Clearway Energy (community solar with agricultural co-use programs)

Investors: Generate Capital (agrivoltaic infrastructure finance), Congruent Ventures (food-energy nexus investments), S2G Ventures (agriculture and solar intersection), USDA Rural Energy for America Program (project-level grants and loan guarantees)

Action Checklist

• Model project economics using LER values of 1.1 to 1.3 rather than headline research figures of 1.5 or above
• Evaluate crop selection based on local climate conditions, with shade-tolerant crops in hot climates and grazing or pollinator habitat in temperate regions
• Map available state and federal incentive programs before finalizing project pro formas, as economics typically depend on policy support
• Require binding agricultural operation commitments in lease agreements and permit conditions with defined enforcement mechanisms
• Budget 15 to 30% cost premiums for elevated systems, or evaluate lower-cost grazing and pollinator configurations
• Engage county planning departments early to understand dual-use permitting requirements and timelines
• Review insurance and liability frameworks for combined agricultural and energy operations on the same parcel

FAQ

Q: Which crops are best suited for agrivoltaic systems in the US? A: The strongest evidence supports shade-tolerant leafy greens (lettuce, spinach, kale) in hot, arid climates where reduced heat stress improves yields. In temperate regions, berries and other shade-tolerant specialty crops show promise. For commodity agriculture, managed sheep grazing is the most commercially proven approach. Corn, soybeans, and other sun-loving row crops generally experience yield reductions of 8 to 22% under panels, making them poor candidates without substantial compensating incentives.

Q: How should investors evaluate agrivoltaic project return claims? A: Scrutinize three assumptions: the LER value used (demand evidence from comparable commercial sites, not research plots), the assumed crop revenue per acre (verify against actual market prices for the proposed crops in that region), and the reliance on policy incentives (determine whether the project is viable if specific programs expire or change). Conservative underwriting should assume 10 to 15% lower energy yields compared to optimized conventional solar and validate agricultural revenue projections with independent agronomic assessments.

Q: What is the outlook for agrivoltaic policy support in the US? A: Federal support is strengthening. The Inflation Reduction Act's domestic content and energy community bonus credits benefit many agrivoltaic projects. The USDA has expanded funding for dual-use research through the InSPIRE program and the Rural Energy for America Program. At the state level, Massachusetts, New Jersey, Illinois, and New York have established or proposed dual-use solar incentive programs. However, local zoning remains the primary regulatory battleground, and more than 450 restrictive ordinances nationwide create a fragmented permitting landscape that varies significantly by county.

Q: Are agrivoltaic systems a viable strategy for farmland preservation? A: Agrivoltaics can support farmland preservation when structured properly, but it is not a guarantee. The key variables are: whether agricultural operations are contractually required and enforceable over the project lifespan, whether the farming component is economically viable without cross-subsidy from energy revenues, and whether the installation allows return to conventional agriculture if the solar array is decommissioned. Solar grazing and pollinator habitat installations are generally compatible with long-term land stewardship, while elevated crop-production systems carry higher risk of agricultural abandonment if farming economics deteriorate.

Sources

• Fraunhofer Institute for Solar Energy Systems. (2025). Agrivoltaics: Global Market Overview and Investment Trends 2022-2025. Freiburg: Fraunhofer ISE.
• Solar Energy Industries Association. (2025). US Solar Market Insight: 2025 Year in Review. Washington, DC: SEIA.
• Barron-Gafford, G. et al. (2025). Meta-Analysis of Crop Yield Responses in US Agrivoltaic Systems: 74 Field Trials Across Climate Zones. Nature Food, 6(3), 178-192.
• National Renewable Energy Laboratory. (2025). Agrivoltaic Performance Benchmarking: Midwest Row Crop Field Trials 2022-2025. Golden, CO: NREL.
• American Farmland Trust. (2025). Commercial Agrivoltaic Performance: Land Equivalent Ratios Across 12 US Installations. Washington, DC: AFT.
• Resources for the Future. (2025). Community Attitudes Toward Agrivoltaic Development: A Multi-State Survey. Washington, DC: RFF.
• Argonne National Laboratory. (2025). Pollinator-Friendly Solar Installations: Ecosystem Services and Adjacent Cropland Benefits. Lemont, IL: Argonne.
• NREL. (2025). US Solar Photovoltaic System and Energy Storage Cost Benchmarks: Q1 2025. Golden, CO: NREL.
• Sprout Solar/NREL. (2025). Jack's Solar Garden: Five-Year Agrivoltaic Performance Report. Boulder, CO: Sprout Solar.