Reference project

The Grunwald farm

The Grunwald farm is located in the Hürtgenwald/Raffelsbrand region and experiences a high energy demand in the early morning hours. To cut costs and ensure efficient energy supply, Grunwald has opted for a Voltfang battery storage solution.

Profile of Grunwald Farm

  • Location: Hürtgenwald, North Rhine-Westphalia
  • Industry: Agriculture
  • Operator: Michael Grunwald

Advantages for the Grunwald farm

Own consumption increased to 93.3%
By optimizing self-consumption
Reduction of operating costs
With the help of peak shaving
Efficient energy use
With the Voltfang storage system, self-sufficiency is 37.4%.
30t of CO2 saved over 20 years
In addition, the 2nd Life batteries do not require any further resources

Implemented use case

The Grunwald farm has achieved unbeatable advantages through the utilization of our commercial storage solution. Thanks to self-consumption optimization and peak load capping, self-produced solar power can be stored on site. As a result, the operation becomes independent of expensive grid electricity and can transition to a sustainable and cost-efficient energy supply.

Self-consumption optimization
Independent and sustainable
Peak shaving
Save avoidable costs

Aim of the project

The Grunwald agricultural business wanted to make its energy supply more sustainable. By implementing our commercial energy storage for self-consumption optimization and peak shaving, Grunwald was able to efficiently meet its energy demands, reduce costs, and simultaneously contribute to a sustainable future. A groundbreaking concept that inspires other agricultural enterprises and sets a new standard. Welcome to the energy-efficient agriculture of the future.

Our customized solution

The Voltfang commercial storage system used by the farmer Grunwald was delivered with a capacity of 58 kWh and an output of 30 kW.

Our commercial storage solution

Capacity up to

58 kWh

Power up to

30 kW

The Grunwald farm, with its sustainable energy concept, is setting a pioneering standard for future agricultural enterprises.

Additional reference projects

Below, we present additional reference projects where a Voltfang battery storage system has been implemented. These projects can encompass a variety of applications and industries, including hospitality, agriculture, bakeries, and supermarkets.

Packaging industry Kemapack

Kemapack GmbH uses a PV system and a Voltfang second-life storage system to efficiently supply packaging machines and charging points with green electricity. This reduces energy costs and increases independence from the grid.
90 kWh installed Storage capacity
45 kW available Performance
Charging infrastructure Supply of employees & fleet introduced
Mehr Informationen

Mechanical engineering Myrenne

The medium-sized company Myrenne GmbH offers complete solutions in mechanical engineering from its base in the Eifel region. The production company has a 268 kWp PV system and has been scaling its battery storage capacity ever since.
Roetgen, North Rhine-Westphalia Location
System supplemented by 336 kWh in 2024 Extension
EVO & LSK Use cases
Mehr Informationen

Steel trade Kerschgens

Kerschgens from Stolberg, a leading steel trading company, uses the Voltfang storage system to reduce peak loads and sustainably lower CO₂ emissions.
1.3 MWh Installed storage capacity
Peak load: -37.5% Reduced from 400 kW to 250 kW
Charging for electric vehicles Implemented on-site
Mehr Informationen

Stuttgart Airport

Stuttgart Airport relies on green battery storage systems from Voltfang to save CO₂, cap peak loads, and ensure a sustainable energy supply.
540 kWh Installed storage capacity
Net Zero by 2040 Airport’s goal
10× expansion planned auf 5,4 MWh Speicherkapazität
Mehr Informationen

PV and charging park

Our partner Bidirex has implemented an energy concept for a supermarket. PV system and Voltfang battery storage system ensure a sustainable power supply.
400 kWp Photovoltaic system
360 kWh Battery storage in a 20-foot container
22 charging points for electric vehicles, 84 parking spaces
Mehr Informationen

Apartment building

A modernized apartment building from the 1960s relies on a solar system and Voltfang battery storage for contemporary, self-sufficient living.
21.5 kWp PV system
KfW 40 EE Residential construction
100% self-sufficient Additional feed-in to the grid
Mehr Informationen

McDonald’s

The switch to green energy at the McDonald's branch in Pombal, Portugal, underlines the increased commitment of large companies to a sustainable energy supply.
Pioneer Green energy supply
Peak shaving Use case
Since 2020: 100% green energy used from hydropower
Mehr Informationen

Hotel zur Post

The 'Hotel zur Post' in Steimbke is a small, cozy private hotel with a total of 14 rooms.
PV + CHP UNIT Integration
Self-consumption optimization Use case
CO2 savings No new resources used
Mehr Informationen

ALDI Nord

With over 5,000 stores and 88,000 employees, ALDI North is one of the largest retail chains in the world.
Reduce energy costs By optimizing consumption
+ 45 % Increased self-sufficiency
100% Share of renewable energy since 2021
Mehr Informationen

Optimize your energy

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How our approach works

Contact request & consulting
After completing the form, you'll receive not only further information but also the identification of a suitable battery storage system in a personal initial consultation.
Contact request & consulting
After completing the form, you'll receive not only further information but also the identification of a suitable battery storage system in a personal initial consultation.
Offer & reservation:
After consultation, our sales department will prepare a detailed offer. When the order is confirmed, we reserve the battery storage system and set a rough delivery month.
Offer & reservation:
After consultation, our sales department will prepare a detailed offer. When the order is confirmed, we reserve the battery storage system and set a rough delivery month.
Assembly & commissioning:
A specialist company installs the battery storage system, Voltfang employees put it into operation, seamless integration for optimum operation.
Assembly & commissioning:
A specialist company installs the battery storage system, Voltfang employees put it into operation, seamless integration for optimum operation.
Monitoring & support
The battery storage system is registered in the market master data register. In addition, the storage system is constantly monitored to ensure smooth operation.
Monitoring & support
The battery storage system is registered in the market master data register. In addition, the storage system is constantly monitored to ensure smooth operation.
Aftercare & service:
Voltfang provides continuous support after installation. Our team is always available for questions and support to guarantee optimum system functions.
Aftercare & service:
Voltfang provides continuous support after installation. Our team is always available for questions and support to guarantee optimum system functions.