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Bosch Energy and Building Solutions Global
Baden State Brewery Rothaus

Powering a beloved brand of beer with regional, renewable energy

Bosch Energy and Building Solutions for the Rothaus Brewery
Is it possible to brew beer sustainably?


With biomass from the Black Forest.

The Rothaus brewery uses woodchips from the surrounding Black Forest to fill 70% of its energy needs and guarantee long-term supply.

Quick facts

Baden State Brewery Rothaus needed to boost efficiency and improve supply predictability. The solution: a renewable biomass system planned, installed and operated by Bosch.

Energy produced: 12,000 MWh heat/year

Energy costs: -25%

CO₂: -3,300 tons/year

Energy Partnership:

Baden State Brewery Rothaus and Bosch Energy and Building Solutions.


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Beer – a high-energy product

That’s one of the key challenges Christian Rasch, Managing Director of Baden State Brewery Rothaus, faces in his daily business.

Located in the heart of the Black Forest, 3,300 feet above sea level, Rothaus is one of Germany’s most successful regional breweries.

In business since 1791, the company is best-known for its “Tannenzäpfle” pilsner with the iconic pine cone logo.

Christian Rasch holding a bottle of beer and Rothaus’ efficient production.
Christian Rasch is proud of Rothaus’ records.
Rothaus’ brewery production line
Rothaus’ efficient production line

To achieve the desired flavor and texture, beer ingredients have to be cooked for hours, and energy requirements vary constantly during the brewing process. What’s more, apart from producing 840,000 hectoliters of beer a year, the brewery also operates offices, a shop, a restaurant and a small hotel.

Rothaus needed a modern energy-supply concept that built on its history of environmental conservation while boosting efficiency and predictability in the face of rising energy costs.

They chose an innovation partner who could also draw on decades of experience as a manufacturer: Bosch.

At Rothaus, innovation also means taking a business risk now in order to profit later. For visionary investments of this magnitude, it’s essential to work with a reliable partner. In Bosch, we have found such a partner.

Christian Rasch, Managing Director

The solution

Woodchips for the state-of-the-art automated biomass boiler system Bosch Energy and Building Solutions has installed for Rothaus.

The Bosch team and Rothaus came up with a perfect concept for long-term efficiency gains: a state-of-the-art automated biomass boiler system that delivers the heat energy and steam needed for brewing, bottle washing and beyond. Instead of heating oil, the system uses woodchips from the surrounding Black Forest – a renewable, locally-sourced, CO₂-neutral fuel that is available year-round.

Fully automated to control heat and air supply in real time as energy requirements shift, the biomass system supplies up to 4,5 tons of saturated steam per hour at a pressure of 7 bar. And although Rothaus’ previously existing oil boilers still spring into action temporarily during peak times, the brewery has been able to save 1.2 million liters of heating oil per year since installing the Bosch system.

A one-stop-shop partner

Rothaus benefits from Bosch’s integrated approach: All parts are perfectly coordinated to save costs and free up resources for the brewery’s core business.

The result

Today, Rothaus isn’t only one of the most profitable regional breweries, it's also one of the most sustainable, consuming energy far below industry average.

Regional fuel supply

Woodchips are locally sourced and available year-round through the Bosch network. Local production supports the regional value chain and ensures short transportation routes.

Reduced emissions

The brewery’s CO₂ footprint was reduced by about 3,300 tons a year. For scale: If these emissions were released into the atmosphere, it would take a forest of 265,000 birch trees to absorb them.

Energy gains

The biomass system delivers about 12,000 MWh of energy per year. That’s 70% of the total energy needed for production, operation and administration.

Cost savings

Despite a relatively small investment, Rothaus was able to slash energy costs by 20% by significantly reducing heating oil consumption.

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