Multi-Year Field Study Finds that Agrivoltaics Can Support Healthy Potato Yields

Why It Matters

The results demonstrate that APV installations can be engineered to coexist with staple crops, offering a pathway to dual land use without severe agricultural losses. This insight is vital for investors and policymakers seeking to expand renewable energy on farmland.

Key Takeaways

• Moderate shading reduces potato yields by ~12% on average.
• High shading (>35%) cuts yields over 30%, shrinking tuber size.
• Dynamic anti-tracking during tuber initiation restores yields above full light.
• Light timing matters more than total shade for crop performance.
• Agrivoltaic designs can balance energy generation with acceptable yields.

Pulse Analysis

The Italian multi‑year experiment provides the most comprehensive data set on potatoes grown beneath solar arrays to date. By deploying REM Tec’s dual‑axis tracking system and testing five distinct shading regimes, researchers captured granular weather, radiation, and plant‑physiology metrics. This level of detail allowed them to move beyond simple average‑shade models and pinpoint the tuber initiation stage as a decisive window where light availability directly influences final yield.

Yield analysis revealed a non‑linear response to shade: low‑density shading (≈20%) incurred a modest 12% penalty, whereas denser configurations (≈40%) triggered steep declines exceeding 30% and produced smaller tubers, though dry‑matter content remained stable. The anti‑tracking (AT) approach, which rotated panels to minimize shade during early tuber development, not only mitigated losses but delivered a modest yield increase, underscoring the power of dynamic light management. These findings align with parallel modeling work from the University of Florence, which reported up to a 15% yield reduction under static shading but noted water‑use efficiency gains from early‑season shade.

For the agrivoltaic sector, the study offers a practical design blueprint: prioritize adjustable shading mechanisms and schedule panel movements to protect critical growth phases. Such strategies can unlock higher solar output without sacrificing agricultural productivity, making dual‑use farms more financially viable. As land‑use competition intensifies, policymakers and investors will likely favor APV projects that demonstrate measurable crop compatibility, positioning agrivoltaics as a cornerstone of sustainable energy‑food integration.