Tag Archive for: crops

By Anna Richmond-Mueller, NCAT Energy Analyst 

Known as the “Sunshine State,” it’s easy to see why solar energy production should be right at home in Florida. The state is also one of the country’s top agricultural producers, raising billions of dollars worth of specialty crops and livestock each year. Agrivoltaics seems like a natural fit and a potential option for farmers and ranchers looking to diversify their revenue and support the growth of renewable energy in the state. At Fiddlehead Farms, owners Walter and Sharon Liebrich are embracing that potential, working hard to bring an agrisolar pilot project and educational space to life in Tallahassee.   

Walter’s interest in agrivoltaics is deeply rooted in his passion for renewable energy. In 1998, Walter was the High School Florida State Champion in Policy Debate when the yearlong topic debated the pros and cons of increasing the use of renewable energy in the U.S. Then in 2004, he earned a Master’s degree in Public Administration from the Askew School of Public Administration at Florida State University. At the time he was in graduate school, connecting a solar project to the grid was an opportunity largely limited to big businesses and utilities. His thesis advocated for solar net metering and interconnection policies for individuals and small businesses in the state, something that wouldn’t be in the Florida statutes until 2008. After earning his degree, Walter went on to work as a Senior Policy and Budget Analyst in the Governor’s Office for 15 years before transitioning into the solar industry. He is also on the Board of Directors for ReThink Energy, a local nonprofit dedicated to community outreach and education for Floridians as the city moves towards its clean energy goals. Through his work with ReThink Energy, Walter joined the Tally 100% Together Coalition and helped to pass a unanimous city commission resolution in 2023, committing Tallahassee to 100% renewable energy by 2050.  

The Liebrich Family.

Walter and Sharon both share a passion for farming and gardening, as well. After meeting in 2009, they started pursuing those passions together by cultivating an edible landscape at their home, with the goal of having their child pick the vegetables for that night’s dinner right in their own backyard. The 0.3-acre primary residence in midtown Tallahassee is home to many varieties of citrus, blueberries, blackberries, fig, pears, mangos, kiwi, avocado, pineapple, peaches and more. They also have a year-round seasonal garden comprised of anything from broccoli, kale, and arugula to tomatoes, peppers, and squash. They began their apiary work in 2019, successfully cultivating bees to help support the worldwide food shortage. By 2023, their impressive dedication to renewable energy and specialty crop production led them to set their sights on a new goal: creating an agrivoltaic community solar project.  

Around the same time, the Tallahassee City Commission unanimously adopted the 100% renewable energy resolution, and Walter and Sharon poured their entire life savings into the purchase of a 5-acre piece of property adjacent to a new public park and cypress preserve in Tallahassee. Their vision for the newly purchased land includes a 1-megawatt agrivoltaic array that would provide locally grown produce for the community, while also helping bring the city closer to its 100% renewable energy goals. However, before that vision can come to life, they must overcome some regulatory barriers for solar in the City of Tallahassee. “Anything from 100 kilowatts to 75 megawatts is all basically regulated under the same umbrella, which is extremely cost-prohibitive,” Walter explains. Projects in this size range are required to undergo thousands of dollars of grid and impact studies before an array can be built. Fortunately, thanks to all his volunteer work with ReThink Energy and Tally 100%, Walter has cultivated a network of professionals in the city and utility, who all want to see his vision become a reality. He understands the importance of building bridges further from home, as well. From the National Renewable Energy Laboratory to the Florida State Director of the Office of Energy, Walter continues to make connections that will be vital in the project’s success. He continues to work with city officials towards a positive change in the regulations for mid-size projects, as well.  

The solar aspect of the pilot project might still be in the early stages, but there’s already a lot happening at the site on the agricultural front. The unkept land was mostly filled with invasive species and heavily vining plants when Walter and Sharon bought it. Clearing invasive species, wild vines, and other biomass on-site is necessary for the project’s implementation. That doesn’t mean that the site will be clear cut and bulldozed, though. Instead, selected areas will be cleaned up while others will remain largely as they are. Any brush and invasive trees that do need to be removed are being used to create biochar, which Walter then uses to construct the raised beds for the row crops. Kale, broccoli, peppers, tomatoes, squash, pineapple, banana, and kiwi will all make an appearance throughout the year. The site is also home to wild sparkleberries and persimmon bushes. These plants will be incorporated into the site’s agricultural production by grafting their close, more familiar cousins onto the existing bushes. Japanese Fuyu persimmons will be grafted onto the wild persimmon bushes, and blueberries will be grafted onto the sparkleberries. Once the plans for solar panels are solidified, they will be built around and above the raised beds and bushes already in place. 

Biochar raised beds.

Looking ahead, Fiddlehead Farms hopes to make a positive impact on both local communities and the agrisolar research community. Most of the food grown at the site will be donated to Second Harvest of the Big Bend, a nonprofit fighting food insecurity in the region. When it comes to research, Walter understands the importance of having test sites and welcomes collaborations with universities, research institutions, and solar companies. He hopes to install a variety of racking types, tracking abilities, and panel heights across the site. Fiddlehead Farms is also a nonprofit organization, and anyone interested in becoming involved in the project is encouraged to reach out to Walter and his team at fiddleheadfarmstlh@gmail.com.  

It’s easy to see the decades of passion and vision behind Fiddlehead Farms. Pilot projects play an important role in showcasing the potential for agrivoltaics to truly make a difference in local communities. Whether it’s providing locally grown food to those in need or working with public officials to make positive changes in renewable energy policy, Fiddlehead Farms is poised to do it all for the Tallahassee area. “From the beginning, I’ve understood the importance of building all kinds of bridges. National, state, and local – even the friends that we’ve made here with the neighbors at the site,” Walter explains. Fiddlehead Farms is the next step in bringing those people together and strengthening the resiliency of the local community.  

All photos courtesy of Walter Liebrich. 

This review examines three key agrivoltaic setups—static tilted, full-sun tracking, and agronomic tracking—dissecting their engineering features’ roles in optimizing both the electricity yield and the fruit productivity of some fruit crops.

In this explainer video, AgriSolar Clearinghouse Director Stacie Peterson offers up five things to know about agrisolar and crops.

This article discusses solar panel efficiency as a function of the location’s microclimate within which it is immersed. Researchers present a model for solar panel efficiency that incorporates the influence of the panel’s microclimate, derived from first principles and validated with field observations. The model proves that PV panel efficiency is influenced by insolation, air temperature, wind speed, and relative humidity. The researchers then classified solar power production potential based on local land cover classification and found that croplands have the greatest median solar potential. Agrivoltaic systems may alleviate land competition or other spatial constraints for solar power development, creating a significant opportunity for future energy sustainability.

This episode is a conversation between NCAT Energy Program Director Stacie Peterson and Iain Ward, a farmer and founder of Solar Agricultural Services.

It is the sixth in a series of AgriSolar Clearinghouse podcasts that are being featured on ATTRA’S Voices from the Field podcast.

Stacie and Iain discuss the potential of agrisolar as way to remove barriers to entry into farming, how agrisolar is shifting the solar industry to consider regenerative agriculture, practical considerations for getting started in agrisolar, Iain’s connection with Wendell Berry, and Wendell’s thoughts on co-locating solar and agriculture. 

Related NCAT Resources:

Other Resources:

Contact Stacie Peterson at stacieb@ncat.org.

Please complete a brief survey to let us know your thoughts about the content of this podcast.

You can get in touch with NCAT/ATTRA specialists and find access to our trusted, practical sustainable-agriculture publications, webinars, videos, and other resources at ATTRA.NCAT.ORG.

This material is based upon work supported by the U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy (EERE) under the Solar Energy Technologies Office Award Number DE-EE000937. Legal Disclaimer: The views expressed herein do not necessarily represent the views of the U.S. Department of Energy or the United States Government.

Wondering how solar energy arrays can benefit pollinator health and habitat? Find out in this interesting podcast from our archives!

This episode features a conversation between Stacie Peterson, NCAT’s Energy Program Director and Manager of the AgriSolar Clearinghouse, and Pete Berthelsen, Executive Director of The Bee and Butterfly Habitat Fund and President of Conservation Blueprint. 

It is the fourth in a series of AgriSolar Clearinghouse podcasts that are being featured on ATTRA’S Voices from the Field podcast.  

Pete and Stacie discuss the benefits of pollinator habitat at solar energy sites, pollinator habitat design, seed mixes, pollinator health and quality, and what anyone can do to help pollinators in their own backyard. 

AgriSolar Clearinghouse Resources: 

Other Resources: 

Contact Stacie Peterson at stacieb@ncat.org.   

Please complete a brief survey to let us know your thoughts about the content of this podcast.   

You can get in touch with NCAT/ATTRA specialists and find access to our trusted, practical sustainable-agriculture publications, webinars, videos, and other resources at ATTRA.NCAT.ORG.   

Learn about NCAT’s other innovative sustainable agriculture programs.   

This material is based upon work supported by the U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy (EERE) under the Solar Energy Technologies Office Award Number DE-EE000937. Legal Disclaimer: The views expressed herein do not necessarily represent the views of the U.S. Department of Energy or the United States Government.  

This study evaluates green bean cultivation inside greenhouses with photovoltaic (PV) panels on the roof. Researchers found that the beans adapted to the change in shading by relocating more resources to the stems and leaves. As a result, average yield decreased compared to that of a conventional greenhouse. However, an economic trade-off between energy and crop yield can be achieved with a panel coverage of 10%. The research also provides an experimental framework that could be replicated and used as a decision support tool to identify other crops suitable for solar greenhouse cultivation.

This article examines current literature regarding the application of shading systems alongside crop production, with a focus on photovoltaic panels and greenhouse studies. After reviewing 113 articles, the authors conclude that most studies do justify the co-location of photovoltaic panels and crops. However, more crop-specific research is necessary to determine the optimum percentage of panels that will not reduce agriculture production.

Agrivoltaic (APV) systems have emerged as a promising solution to reduce the land-use competition between PV technology and agriculture. Despite its potential, APV is in a learning stage and it is still necessary to devote big efforts to investigate its actual potential and outdoor performance. This work is focused on the analysis of APV systems in agriculture greenhouses at global scale in terms of energy yield. In this study, a novel dual APV model is introduced, projected in four representative locations with a high crop cultivation greenhouse implantation, i.e. El Ejido (Spain), Pachino (Italy), Antalya (Turkey) and Vicente Guerrero (Mexico), and for 15 representative plant cultivars from 5 different important socioeconomic families of crops, i.e. Cucurbitaceae, Fabaceae, Solanacae, Poaceae, Rosaceae. At this stage, semi-transparent c-Si PV technology has been considered due its high efficiency and reliability. The results show that APV systems could have a transparency factor around 68% without significantly affecting the total crop photosynthetic rate. Taking this into account, APV systems would produce an average annual energy around 135 kWh/m2, and values around 200 kWh/m2 under a favorable scenario. This could represent a contribution to the total market share between 2.3% (Mexico) and 6% (Turkey), and up to 100% of the consumption demand of greenhouses equipped with heating and cooling (GSHP), and lighting.