Shade for the animals, electricity for the factory: Why this energy transition model will catch on
Moving away from fossil fuels: How this food processing plant saves millions with cow pastures and heat pumps
In Biessenhofen, Bavaria, the food giant Nestlé is demonstrating how the industrial energy transition of the future can look in practice. With an innovative “cow-PV” system, the company combines state-of-the-art solar power generation with traditional dairy farming, creating a win-win situation for both industry and agriculture. Covering an area of nearly five hectares, thousands of solar panels provide valuable shade for grazing cows while simultaneously supplying a quarter of the electricity needed for the adjacent nutrition plant. But the solar plant is just the visible part of a much larger plan: coupled with high-performance industrial heat pumps, it creates an intelligent, closed-loop energy system that drastically reduces the use of fossil fuels. This multi-million-euro project impressively proves that climate protection, security of supply, animal welfare, and economic viability don’t have to be mutually exclusive, but rather complement each other perfectly through smart local cooperation.
Where pasture milk and megawatts go hand in hand: Why Biessenhofen is more than a PR project
On April 21, 2026, Nestlé officially opened a so-called “cow-PV” system at its Nutrition plant in Biessenhofen, in the Bavarian Allgäu region – an agri-photovoltaic solution that combines solar power generation and agricultural grazing on the same land. The system was realized in partnership with local farmer Gerhard Metz and the renewable energy company BayWa r.e., which contributed its expertise in planning, construction, and operation. What at first glance appears to be a commendable sustainability initiative is, upon closer inspection, an economically sound overall concept that addresses several challenges simultaneously: volatile energy markets, rising CO2 costs, regulatory pressure, and the structural dependence of industrial food production on fossil fuels.
Technical basis: What the system can do and how it works
The agrivoltaic system covers an area of 4.74 hectares – roughly equivalent to seven football fields – in the immediate vicinity of the Nestlé Nutrition plant, to which it is directly connected. With an installed peak capacity of 4.5 megawatts and a total of 7,800 solar modules, it can theoretically cover around a quarter of the plant’s electricity needs, which corresponds to the annual electricity consumption of approximately 2,000 single-family homes. The modules are mounted at a height of two meters and have a row spacing of 3.30 meters, allowing access for tractors, mowers, and forage wagons, thus ensuring that agricultural operations can continue uninterrupted.
The system meets the requirements of DIN SPEC 91434, which defines binding criteria for the primary agricultural use of agrivoltaic projects. Even during the test phase in March 2026 – with reduced operation and seasonally low solar irradiance – a 14 percent reduction in the plant’s electricity consumption was achieved. On particularly sunny days, the generated solar power is sufficient to operate the entire plant. Surplus solar power is fed into the public grid.
Economic investment logic: Three million euros with multiple benefits
Nestlé has invested around three million euros in the project. This sum may seem modest at first glance, but it is deliberately designed to create leverage: The direct connection to the plant and the on-site use of the electricity eliminate grid fees and transmission costs that would be incurred with externally sourced electricity. The combination of self-consumption and occasional grid feed-in creates a robust economic foundation that also protects against rising electricity prices. Plant manager Frank Brinkmann emphasized that the investment is intended to simultaneously improve the plant’s competitiveness – reducing energy costs and climate protection go hand in hand here.
For farmer Gerhard Metz, lease payments from leasing land provide additional income streams that stabilize his agricultural earnings during times of volatile producer prices. At the same time, he has invested in a new, modern barn for up to 50 cows with automated milking technology, directly adjacent to the agri-PV area. The installation of a milking robot with selection gates, which controls grazing based on individual cow data, significantly reduces labor and increases operational efficiency. Thus, the overall project is mutually beneficial for both parties – industry and agriculture.
The integrated energy system: Heat pumps as a key technology
The agri-PV system is not an isolated component, but rather part of an integrated energy system that is being gradually implemented at the Biessenhofen site. Since July 2024, a highly efficient industrial heat pump has been supplying the plant with 60-degree Celsius hot water via an on-site district heating network, thus replacing fossil fuels that were previously used to generate steam. This system will soon be supplemented by another heat pump for higher temperature ranges, which will heat water to 90 degrees Celsius.
Two newly constructed thermal storage tanks, each with a capacity of 100 cubic meters, ensure a constant supply of hot water. During 2026, two additional heat pumps and a chiller with two compressors will be installed. This chiller will produce cooling water at 10 degrees Celsius, replacing the current system of using drinking water for cooling – a significant step towards water conservation in the production facility. According to the company, the first two heat pumps will save more than 3,000 tons of CO2 emissions annually. The heat pumps are already powered entirely by electricity from renewable energy sources – and will be further powered in the future by the new on-site agrivoltaic system.
The principle is economically compelling: heat pumps generate three to four times the amount of heat energy from one kilowatt-hour of electrical energy. In industrial food production, where heating and cooling are required simultaneously, waste heat from refrigeration systems can be directly recovered and used for heating purposes – a closed loop that fundamentally improves the plant’s energy efficiency.
Animal welfare as a location factor: How cows benefit from solar panels
The concept of the agri-PV system explicitly takes the animals’ needs into account. The modules, mounted at a height of two meters, provide shade for the heat-sensitive cows on sunny days and offer protection from rain. The area accommodates both mother cows and calves and young animals. During the trial operation, the animals oriented themselves well within the area and readily used the shaded areas under the solar modules in sunny weather.
Farmer Gerhard Metz points out that this grazing concept can mitigate the negative effects of climate change on livestock. Rising average temperatures and more frequent extreme heat events are increasingly impacting animal health – heat stress demonstrably leads to reduced milk production in dairy cows. Shading provided by solar panels acts as a cost-effective and productive protective shield, combining animal welfare with economic efficiency. At the same time, the area remains fully usable as pasture and hay meadow, as the spacing between the modules has been specifically designed to accommodate machinery.