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About STABL Energy

Paving the way for a net-zero energy system with safe, reliable, and sustainable battery storage.

STABL Energy strives for sustainable energy use with its inverter technology. Our goal is to increase the use of renewable energies with the help of energy storage. We do this by setting a new standard for battery storage. With our easy-to-integrate technology, we improve the design, safety, reliability, cost efficiency and handling of battery storage.

Our power conversion system also allows seamless and easy integration of used car batteries, which extends the lifetime of batteries and reduces their resource consumption. Thus, STABL Energy enables the most profitable and sustainable battery systems.

Normal battery inverters switch the high voltage of the power storage unit on and off for different lengths of time. This process is called pulse width modulation. The resulting voltage must be smoothed by a so-called grid filter so that it complies with the standards and requirements of the electricity grid. This costs efficiency and causes losses.

In science, STABL Energy's approach is called a "modular multilevel inverter" and is widely used in high-voltage DC transmission. STABL Energy was the first company to optimise it for stationary battery storage systems. Here, the sinusoidal voltage is simulated by connecting the individual battery modules in series one after the other. The step voltage generated in this way resembles the desired mains voltage much more than that of ordinary inverters. This means that the grid filter can be smaller and losses are minimised.

STABL Energy emerged from research projects at the Technical University of Munich, the University of the Federal Armed Forces Munich and the Osnabrück University of Applied Sciences. The company was founded in January 2019 as m-Bee GmbH and renamed STABL Energy in July 2020. STABL Energy hired its first employee in spring 2020 and has since grown steadily to now have 14 permanent and 13 part-time employees.

After initial funding through the EXIST programme of the Federal Ministry of Economics and Culture, STABL Energy was able to finance itself through several investment rounds and grants.

The founders of STABL Energy already know each other from their student days. Arthur and Martin were involved in the initial underlying research project, Nam and Arthur have known each other since the first day of their electrical engineering studies and Christoph worked together with Nam in a student consultancy. These long friendships laid the foundation for a business venture together and form the basis of the corporate culture at STABL Energy.

STABL is pronounced like the English word "stable".


You can find an example here.

Product and technology

STABL Energy is developing a novel inverter technology that replaces the conventional central inverter for storage integrators and EPCs.

Our first product is the STABL SI100 - a modular multilevel inverter for stationary commercial and industrial storage systems.

Battery storage can be used in many different applications, such as increasing self-consumption and capping peak loads.

You can find an insight into why battery storage can be attractive for companies in our blog article:

Why battery storage for businesses may be worthwhile in 2021.

STABL Energy only develops the technology and the modular inverter. This is then sold by our partners in conjunction with battery storage systems. Thus, STABL Energy does not sell its inverters directly to end customers.

Are you a project developer for battery storage systems and would like to offer STABL inverters in the future? Or are you looking for one of our partners to purchase a battery storage system with STABL technology?

You can contact us at any time and we will be happy to help you.

Second life batteries are batteries that have reached the end of their "first life", e.g. in the mobility sector. Classically, this happens when they can only provide 80 % of their original capacity. For stationary applications as electricity storage, however, these batteries can still be usable for a long time - and thus still offer added value in their "second life".

STABL Energy makes this profitable for the first time, as the Second Life batteries do not have to be processed and matched to each other as was previously the case, but our modular system architecture enables batteries of different states to be interconnected.

You can gain deeper insights into this in our Whitepaper.

An inverter is a device that converts direct current into alternating current and vice versa.

A battery in itself can only deliver direct current. This results from a DC voltage between the positive and negative terminals. However, thanks to Nikola Tesla, the power grid is based on alternating current or alternating voltage, i.e. a current that changes direction at a certain frequency (50 Hz in Europe).

The aim of every inverter is to generate a grid-compliant sinusoidal voltage from the battery's DC voltage and vice versa. Basically, an inverter is comparable to the power supply unit for a smartphone, with the difference that the battery inverter can also feed energy from the battery into the grid.

Would you like to learn more about the processes in a battery storage system?

For more information, see our blog article:

How does a battery storage system work?

Unfortunately not. At the moment, we only offer solutions for commercial & industrial and utility-scale storage systems.

Another question?

Do you have a question that you cannot find an answer to here?

Please contact us - we will be happy to help you.