Solar Sharing for Both Food and Clean Energy Production: Performance of Agrivoltaic Systems for Corn, A Typical Shade-Intolerant Crop

• Main Authors: Takashi Sekiyama, Akira Nagashima
• Format: Article
• Language: English
• Published: MDPI AG 2019-06-01
• Series: Environments
• Subjects: agrivoltaic systems; stilt-mounted photovoltaic panels; shade-intolerant crops
• Online Access: https://www.mdpi.com/2076-3298/6/6/65

The purpose of this research was to examine the performance of agrivoltaic systems, which produce crops and electricity simultaneously, by installing stilt-mounted photovoltaic (PV) panels on farmland. As PV power stations enjoy remarkable growth, land occupation with the purpose of establishing solar farms will intensify the competition for land resources between food and clean energy production. The results of this research showed, however, that the stilt-mounted agrivoltaic system can mitigate the trade-off between crop production and clean energy generation even when applied to corn, a typical shade-intolerant crop. The research was conducted at a 100-m² experimental farm with three sub-configurations: no modules (control), low module density, and high module density. In each configuration, 9 stalks/m² were planted 0.5 m apart. The biomass of corn stover grown in the low-density configuration was larger than that of the control configuration by 4.9%. Also, the corn yield per square meter of the low-density configuration was larger than that of the control by 5.6%. The results of this research should encourage more conventional farmers, clean energy producers, and policy makers to consider adopting stilt-mounted PV systems, particularly in areas where land resources are relatively scarce.