The Mobility House and GESI Giga Batteries commercialize large-scale energy storages for the energy transition in a joint venture

June 25, 2024|Munich, Zurich

  • The Mobility House and Green Energy Storage Initiative SE establish a joint venture for the realization, commercialization, and financing of battery energy storage systems (BESS) in Germany. 
  • The commercialization is based on the eight years of experience and continuous development of algorithms of The Mobility House. 
  • By 2035, up to 8 GW of storage capacity will be constructed together. The first site will have 750 MW of storage capacity in two expansion stages.

The technology company The Mobility House and Green Energy Storage Initiative SE (GESI Giga Batteries), a project developer of large-scale battery storage systems, have founded a joint venture. The goal of the joint venture is to build and commercialize large-scale battery storage systems to accelerate the next phase of the energy transition and to reduce the costs of grid congestion. By 2035, both experts plan to develop up to 8 GW of storage capacity, preferably at grid-supporting locations and former conventional power plants. 

The joint venture will be responsible for the development, construction, operation, and maintenance of individual sites. Within the collaboration, GESI will handle financing and project coordination. The Mobility House will take care of the intelligent control and commercialization of the batteries in the European power and balancing energy markets. Since 2016, the company has been a pioneer in commercializing stationary 1st- and 2nd-life car batteries to combine electromobility and renewable energy for a sustainable future. The Mobility House already trades over 4,500 electric car batteries with more than 100 MW capacity in the European power and energy markets. 

Storages for the energy transition

In the course of the energy transition, enormous power reserves are needed to balance the highly fluctuating feed-in from renewable energies. Currently, the generation of solar or wind energy, for example, often must be curtailed or even stopped because there is not enough storage capacity available. Last year alone, electricity worth 3.1 billion euros was lost as a result. Battery storage systems are the most efficient solution for balancing this fluctuating feed-in because they offer quick response times and high flexibility at low costs. This ability to provide energy in a timely and demand-oriented manner maximizes the use of renewable energy sources while simultaneously reducing dependence on fossil gas and coal power plants. 

"Our collaboration with GESI is another step towards our vision of a zero-emission future. With the planned gigawatt-scale storage systems, we are significantly contributing to the energy transition. This accelerates the development towards a stable and renewable energy supply for tomorrow. Our expertise complements each other perfectly: industry know-how and financial strength meet many years of experience in battery storage commercialization."

Thomas Raffeiner,

Founder and CEO of The Mobility House

"We are very much looking forward to the collaboration. The Mobility House has great expertise when it comes to integrating storage systems into the grid and electricity commercialization. Therefore, The Mobility House is an optimal partner for our ambitious large-scale storage projects, through which we aim to accelerate the energy transition and save millions of tons of CO2."

Walter Raizner,


Preparations for the first joint project are already well advanced: a large-scale storage system with 250 MW of storage capacity is in concrete planning. In the second expansion stage, an additional 500 MW will be added. 

The Smarter E AWARD 2024: The Mobility House impresses with Trading as a Service

The trading algorithms of The Mobility House have been awarded the prestigious The smarter E AWARD in the category "Smart Integrated Energy" by a high-caliber jury. The aggregation and trading platform combines state and temperature monitoring with AI-supported algorithms to maximize trading revenue while minimizing battery degradation. The Mobility House has incorporated extensive experience into this development. Especially due to their long-standing expertise in marketing 2nd-life batteries, which require particularly gentle operation, and spare part batteries that are still to be installed in vehicles.

About GESI Giga-Batteries: 

The project development company was founded by entrepreneurs and top managers with many years of experience in large-scale projects. They aim to accelerate the energy transition through the development, financing, and operation of large-scale battery storage systems. The operational business is led by Walter Raizner (Chairman & CEO, former COO of the IBM Technology Group and former Telekom board member) and Jens M. Wegmann (COO, most recently S-Dax board member at Kloeckner & Co. SE). For more information, visit

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