Agrivoltaics

Sustainable symbiosis between agriculture and renewable energy

Researching an innovative combination of agriculture and renewable energy

Agriculture worldwide is facing the challenge of adapting to the requirements of a more sustainable food production. At the same time, the production of renewable energy is becoming increasingly important in order to mitigate climate change and drive forward the energy transition. This requires a large amount of land, including agricultural land. Agrivoltaics (Agri-PV) is an innovative solution that combines these objectives.

Agri-PV plants are solar systems that are installed on agricultural land. They combine the production of clean solar energy with agriculture and thus create a sustainable symbiosis.

Solar power and agriculture on the same field – RWE is investigating how this can work best in a demonstration plant in Germany’s Rhenish mining area – at the edge of the Garzweiler open-cast mine near Bedburg. The project is being scientifically supported by the Institute for Plant Sciences at Forschungszentrum Jülich (Jülich Research Centre) and the Fraunhofer Institute for Solar Energy Systems. The research project is funded by the federal state of North Rhine-Westphalia through the progres.nrw programme for climate protection and energy transition.

Opportunities and potential of an Agri-PV plant

The demonstration plant will help RWE to identify opportunities and get the best out of the technology as it is further developed. RWE wants to use the research project to clarify fundamental questions such as suitable crops or the optimal design of the PV systems. However, the project will also focus specifically on possible concepts for collaborating with the farmers. A solid foundation is needed in order to identify the full potential of Agri-PV.

Katja Wünschel | Chief Executive Officer (CEO) Renewables Europe & Australia
Katja Wünschel | Chief Executive Officer (CEO) Renewables Europe und Australia

Land is a scarce resource. We must use it responsibly and efficiently. With the large number of sites needed for the expansion of solar energy, synergies like those offered by Agri-PV are extremely valuable. This concept makes it possible to bring in two different yields from the same land – solar power and agricultural production. With our demonstration plant in Bedburg we are providing important application research enabling us to utilise the full potential of this technology in the future.

Katja Wünschel, CEO RWE Renewables Europe & Australia


Funded research project with a lot of expertise

In September 2023, RWE officially launched the project in Germany for the first time in the presence of Frank Rock, Rhine-Erft County Commissioner, Sascha Solbach, Mayor of the City of Bedburg, and Prof Ulrich Schurr, Director of the Institute for Plant Sciences at Forschungszentrum Jülich.

After a construction period of just five months, RWE’s Agri-PV plant in Germany fed green electricity into the grid for the first time. The first crops were planted and sown in spring. The research activities will begin in the summer and will run for at least five years. The demonstration plant has a peak capacity of 3.2 megawatts (approx. 2.5 MWac) and consists of three technical Agri-PV concepts, which allow for both agricultural and horticultural use of the land.

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RWE project manager Andreas Schulz, Rhine-Erft County Commissioner Frank Rock, Prof Ulrich Schurr, Katja Wünschel, Dr Lars Kulik, Mayor Sascha Solbach
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Key facts about the demonstration plant in Germany

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Start of research activities

Three technical concepts – one location

Three different technical Agri-PV concepts are implemented in the research project, which enable both an arable and a horticultural use of the land. Alfafa and a mixture of clover and grass were sown on the first two plots (variants 1 and 2) in the first year of the trial. These plants prepare the soil for the cultivation of cereals, root crops and vegetables in the coming years, while raspberries are grown in pots on the third plot (variant 3).

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Concept 1: Vertical modules with cultivation between the module rows

The solar modules are fixed and mounted vertically on the supporting structure. Enough space is left for harvesting machinery between the module rows allowing for the agricultural use of the land to be tested.

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Concept 2: Movable modules – following the course of the sun – with cultivation between the module rows

The solar modules are also installed in rows, but they are mounted on a movable axis, and follow the course of the sun from east to west. This will optimise the energy yield from the PV system and leave land available for simultaneous agricultural use.

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Concept 3: Fixed-tilt modules with cultivation below them

In the third system, the solar modules are elevated on a high pergola-like substructure allowing for crops such as raspberries to be cultivated below them.


Important aspects and advantages of Agri-PV plants

Shaping the challenges of Agri-PV

Despite the many advantages of Agri-PV plants, there are also challenges as to how the symbiosis of agriculture and renewable energy production can be realised on a project-specific basis. On average, an Agri-PV plant is more expensive than a standard ground-mounted PV system – the additional costs depend on the technical solution used. Nevertheless, the increasing number of Agri-PV projects worldwide shows that this innovative solution has the potential to make an important contribution to the sustainable development and the realisation of the energy transition in the country.

Overall, Agri-PV plants can serve as a promising example of combining agriculture and renewable energy production to address the pressing challenges of the 21st century: Climate change, energy supply and sustainable land use.


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