You can find quick answers in our frequently asked questions.
For additional information please send us a message.
Technical questions
How does the wind sail generate electricity?
The wind sail is connected to generators at the lower corners of the sail via movable ropes. These are driven when the wind sail inflates concavely and the lower ropes are tightened. The resistance principle is mainly used here.
How does wind frequency translate into power?
Unlike conventional wind turbines, our system is not optimized for a specific nominal speed, which means that the wind frequency cannot be directly converted into a fixed nominal power.
What wind speeds can the wind sail use?
The system starts generating electricity at a wind speed of 2 m/s. In strong wind events, the wind sail is automatically retracted to minimize dynamic wind loads. The exact limit values are currently being determined with our prototype 1.0.
Commercial questions
Is a building permit required?
The need for a building permit depends on the location and the total height of the building. As a rule, it can be assumed that a building permit is required for buildings over 10m high.
What are the requirements for the location of our wind sail?
The wind sail can currently be installed on all ground-level surfaces as well as on flat roofs. The prerequisites for the location are a power connection and a load capacity of 20 kg/m². In the future, installation on other roof shapes will be possible.
After how many years will the system pay for itself?
Under ideal conditions, our wind sail pays for itself after 9 years. The actual payback depends on the wind conditions and the number of wind sail modules at the location.
What are the plant’s electricity generation costs?
The electricity generation costs of the series are 18 cents/kWh.
What contribution does our wind sail make to environmental protection?
The CO₂ savings of our wind sails (1 system with four sails) corresponds to the CO₂ storage capacity of a small forest of around 500 trees per year.
