Bat shutdown: protect animals, optimise yields

Are you planning to build a wind farm and need help implementing bat shutdowns? Do you operate a wind energy plant and would like more relief in terms of monitoring as well as documentation??

Are you already experiencing enormous yield losses due to faulty shutdowns, are you perhaps even in conflict with the authorities and are therefore thinking about closing your wind farm? We have a solution for you: Fleximaus!

Our clever system adapts to the individual specifications of your wind turbine, both new and existing, and ensures a reliable, economical and legally compliant bat protection.

Fledermausabschaltung Windpark

Your advantages

  • Plannable and transparent costs
  • Increas in wind farm performance
  • Reliable species protection
  • Comprehensive documentation
  • Clear reduction in workload
  • Absolute legal certainty

Bat shutdown for the good of all

Opponents of wind farms constantly accuse this technology of killing thousands of bats through the rotor blades. This argument can be completely refuted, as all modern wind turbines have a permit requirement to reduce the threat to native wildlife to a minimum. The implementation of the shutdown requirements is complex and has to be parameterised individually at each location.

What if there was a simple way to comply with all the bat protection requirements that are relevant to approval, reduce the effort for the operational management and increase the performance of your wind turbines at the same time?

At Fleximaus, we know that it is possible to reconcile different demands. Based on our many years of experience, we have developed intelligent software that helps you both protect native bats and maximise your return on investment with minimal effort.

You would like to integrate our bat shutdown into your wind farm?

From the wind turbine to the species protection wind turbine │ This is how the intelligent bat shutdown works:

The basis for the work of Fleximaus is formed by investigations on the behavior of bats nearby wind turbines. Bat assessors carry out numerous analyses and can subsequently provide specifications for which environmental conditions (outside temperature, wind speed, rain intensity or time of day) make it highly likely that bats are on the move in the rotor area.

Fleximaus compares the survey data with the actual prevailing environmental parameters and shuts down your wind turbines at lightning speed exactly when there is a high probability of bats approaching the rotor blades. Once the danger has been averted, our optimisation system gets your rotors going again almost as quickly. Always with the aim of protecting the endangered creatures as well as avoiding unnecessary downtime.

If Fleximaus is used in parallel with bat monitoring, it additionally compares documented environmental parameters with call records. The result: a far more precise bat shutdown adapted to the location-specific behaviour of the aerial acrobats as well as an even more species-friendly and economical wind farm operation.


Fleximaus keeps you informed about all steps: wind farm operators can monitor the prevailing conditions at the wind turbine in real time from different end devices, as well as track bat shutdowns at any time by means of clear displays.

Are you satisfied with the return on your wind farm?

Find out which energy potentials are also slumbering in your plants!

What distinguishes Fleximaus from other systems?


Our manufacturer-independent system is used in both new buildings and existing plants. In addition, specifications for the bat shutdown can be individually configured and adapted at any time.


By applying our intelligent algorithm, you realise maximum operating times. This implements, among other things, the night decimalisation as well as the patented parking speed.


Our optimisation system is able to collect and process numerous environmental data at lightning speed (every minute or ten minutes) and to integrate data from real-time acquisition systems such as cameras into the shutdowns.


We constantly test the functionality of Fleximaus: technical faults are reported to our team immediately, so that we are able to rectify almost any fault as quickly as possible via remote monitoring.

Legal certainty

Fleximaus guarantees legally compliant fulfilment of all requirements of the approval notice. In this way, no bans are imposed due to missing or incorrect bat shutdowns.


The day-precise observation of sunset and sunrise reduces the viewing time by additional hours per month. In addition, the plausibility of the environmental data is checked.

Accuracy of fit

All Fleximaus environmental sensors are selected according to their readiness for use and form the basis for optimal site-specific species protection.


Both external environmental sensors already present in the wind farm and recording systems that will only be approved in the future can be integrated into the Fleximaus interface.


We work with high-quality industrial components and have designed our specially developed software modules so that they can also be used on future hardware.


Our system documents environmental data – so you can track bat shutdowns at any time with the help of clear representations as well as prove them to the authorities.

Cost recovery

Due to the increase in efficiency associated with Fleximaus, the expenses for a retrofit – depending on the size of the wind farm – pay for themselves within a few months.

Still unsure?

Find out which energy potentials are also slumbering in your plants!

Optional extensions and sensors

Bats fly after dark, hunt more selectively over bodies of water when it rains and are rarely seen in the direct vicinity of wind turbines above a certain wind strength – but not always and everywhere. In order to predict the location-specific flight behaviour of endangered animals during different events and accordingly prevent them from dying, Fleximaus measures and observes numerous environmental parameters.

Rain sensor light

Our rain sensor records the rain intensity [mm/m²] in averages of every minute or ten minutes. The evaluation is carried out via photodiodes that detect passing drops.

Air pressure sensor

The determination of the atmospheric air pressure [hPa] is possible location-specifically with this sensor.

Flexi-Rain rain package

The rain package includes a high-precision rain sensor for the highest requirements as well as our intelligent monitoring software. Flexi-Rain offers you the security of knowing that the rain intensity in your wind farm is accurately recorded and automatically monitored. The great advantage of this unique solution is that no false measurements can occur and thus only the current rain intensity is recorded.

Temperature sensor

With our calibrated sensor, an exact measurement [°C] of the outside temperature in the wind farm is available without the influence of the nacelle waste heat.

Humidity sensor

Our sensor records the air humidity [% rel. humidity] in the wind farm.

Our experts install all the sensors on a bracket specially designed and manufactured for Fleximaus at the base of the tower or on a building in the wind farm. This keeps your energy systems going even during hardware installation and maintenance.

Guaranteed trustworthy.

Many well-known manufacturers already trust Fleximaus.

This means for you:
the guarantee remains intact.




eno energy



GE Renewable Energy


Comprehensively clever in the wind:

Operation of wind turbines in compliance with species protection

We take over the following shutdowns of wind turbines, that are relevant to approval, in their entirety for you:
our “custom-programmed” software modules make it possible!

Bird protection >

Our smart system reliably takes care of the implementation of bird protection requirements that are relevant to approval: complex specifications are implemented automatically, event-dependent stops can be activated very easily.

Shadow shutdown >

If mandatory shading times are exceeded, operators must limit the running time of their rotors. Fleximaus automatically takes care of this shadow shutdown of wind energy plants for you.

Contact Fleximaus GmbH

Are you planning to build a wind energy plant? Or do you already own a wind farm and are dissatisfied with its yield? The experts from Fleximaus GmbH in Schillingsfürst accompany operators, technical managers as well as project developers from the very beginning – from consulting to optimisation. Call, write an e-mail or use the contact form: we look forward to hearing from you!

To the enquiry form >>


Fleximaus GmbH

Faulenberg 3 - 91583 Schillingsfürst - Germany
09868/9341765 -


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