4th Generation Flywheel Technology

A Tried-and-Tested Principle
put to Innovative Use

The flywheel is the oldest known energy storage device: ancient pottery wheels already made use of the principle to store energy in a spinning mass, as do the whirligig or spinning top. Adaptive Balancing Power now takes this tried and-tested technology to a new level – with a modern 4th generation flywheel energy storage system made of carbon fibre, integrated magnetic bearings, and operating in a vacuum: The adaptive Flywheel convinces with high efficiency and unlimited charging cycles.

Designed for Maximum Power

The basic working principle is: an electric motor accelerates the flywheel in order to charge it with energy. In generator mode, the motor decelerates the flywheel, and the stored rotational energy is transformed back into electricity. The system offers high performance and maximum efficiency due to its innovative design – utilising an external rotor, based on a rotating hollow cylinder made of high-tensile material.

Long-lasting, Flexible, Sophisticated

As a mechatronic energy storage system, the flywheel is not subject to aging due to cycling – during its 25-year service life, it can be charged and discharged as often as required. The unique modular design allows adaptation to a variety of different application-specific requirements.

Unlimited charge cycles

25 years lifetime

Sustainable energy storage

Modular and scalable

The modularity of the flywheel energy storage systems enables tailoring system sizes to application needs, starting with a single flywheel all the way to systems comprising up to 16 flywheels with a total power of 5 MW. System integrators are thus able to conveniently adjust the power and capacity of their facilities, making new applications commercially viable.

Carbon Fibre Rotor

Innovative integrated hollow cylinder design – the flywheel revolves around the stator. This design realises maximum capacity at affordable manufacturing costs. The flywheel rotates with speeds of up to 16,000 rpm, can store up to 12 kWh, and offers unlimited cycling.

Motor / Generator

The outer-rotor synchronous motor accelerates the flywheel during charging, and decelerates it as a generator during discharging. The motor is characterised by high power density, great efficiency and dynamics. Even at full load, power reversal is possible within less as 30 milliseconds.

Magnetic Bearing

The high rotational speed and the high energy density are made possible by the contactless magnetic bearing. The bearing system works efficiently and without any wear and is an industrial standard. The maintenance interval for the energy storage system is two years.

Vacuum Housing

Operating the rotor in a high-vacuum environment at up to 1 x 10-5 mbar minimises air friction and contributes significantly to the high efficiency of the storage system. Moreover, the vacuum housing ensures system safety, even at an overspeed factor of 1.2.

Technische Daten

Der modulare Aufbau dieser Energiespeicher ermöglicht bedarfsgerechte Anlagen, bestehend aus einem einzelnen Flywheel.


Lorem Ipsum


Lorem Ipsum


Lorem Ipsum


Bespoke Flywheel packages


Minimum requirements for the location: concrete base plate, dry environmental conditions, controlled access

Concrete Housing

Minimum requirements for the location: levelled and compacted sand bed


Minimum requirements for the location: concrete base plate

Application specific packaging


Energy Management and HMI

Cloud Visualization and Data Analytics

A cloud-based data dashboard permits secure real-time access to the performance data of the energy storage system. Sophisticated tools allow customer-specific insights into system dynamics, efficiency, and profitability. Application-specific digital twins – i.e. system-parallel online simulations – provide information about options to optimise operation.

Energy Management

If needed, the flywheel system can react autonomously by monitoring grid conditions such as voltage and frequency or by reacting to control commands from the customer’s own energy management system.

In collaboration with the customer, it is also possible to implement a customer-specific energy management, thus considering all individual customer requirements.

Since the energy management system is implemented using state-of-the-art control hardware and it is efficiently integrated into the flywheel system, reaction times are minimal – less than 30 milliseconds – even at full power reversal.

HMI and Commissioning Interface

The energy storage system offers a human-machine interface for interaction with the flywheel and the energy management system. Personalised user profiles allow various users – starting with read-only access all the way to complete access to all parameters for commissioning of the system. Upon request, even remote access can be realised.


Reliable Cooperation
During the Entire Life-Cycle

Installation and Commissioning

The flywheel systems are installed and commissioned by Adaptive Balancing Power specialists on site. Collaboration with the customer staff takes place in English or German as preferred.

About the procedure itself: Before release of a system for delivery a factory acceptance test is standard procedure, followed by a post-commissioning final site acceptance test.


Training Packages

All flywheel system deliveries include a two- to four-day training package for the operating personnel, including standard systems operations and basic maintenance procedures.

Service and Maintenance Schedule

Adaptive Balancing Power offers service and maintenance plans. The annual basic maintenance on vacuum and cooling systems may be conducted by trained on-site personnel if preferred. All two years a detailed on-site systems check-up is conducted by Adaptive Balancing Power specialists. Continuous real-time systems diagnostics are provided via the Adaptive Cloud.