Heliox, a Siemens business

Heliox, founded in Best in 2009, builds fast chargers for electric buses, trucks and cars. It counts the first electric bus depot, in Eindhoven in 2014, among its milestones, followed by a 32-megawatt fast-charging network at Amsterdam Airport Schiphol in 2019, the first en-route pantograph chargers for public transport in Chicago, and in 2025 the first commercially available charger in North America for two-way charging under the ISO 15118-20 standard. Siemens acquired Heliox in January 2024, and the company now operates as Heliox, a Siemens business.

Heliox joined NEON for the research on chargers that connect directly to the medium-voltage grid. In 2019 the company described such a power conversion architecture as a breakthrough in cost, size and efficiency for high-power chargers, one that would allow faster mass adoption of the converters the energy transition needs. Heliox brought its know-how on modular, bidirectional power conversion for ultrafast chargers and on converters with a long lifetime and no downtime, and it supported NEON's modelling of future charging scenarios. NEON researchers also carried out case studies with Heliox on charging electric trucks and electric aircraft.

The work package delivered two PhD theses on that architecture, by Ygor Pereira Marca in 2024 and Kaveh Pouresmaeil in 2025: chargers that draw their power straight from the medium-voltage grid.

From the former NEON website

About Heliox, a Siemens business

Heliox is specialized in power management technology. With worldwide presence Heliox develops, manufactures and delivers products, services and solutions for a broad range of applications. The core business of the company is focused on high performance high power charging infrastructure and all related services. The experience and the continuous investment in R&D has resulted in a strong growing position in the high power charging market with over 250MW installed in the field.

Role in NEON

From its experience and application knowhow Heliox will contribute on the area of modular bidirectional power conversion for MV grid-connected ultrafast chargers and power converter architectures with extended lifetime and zero downtime. Next to that Heliox will support the valuable work on modelling and exploring transformative energy and charging scenarios.

Motivation for joining NEON

The mission of Heliox is dedicated to transforming inspiring ideas into innovative and reliable power management products and services for the energy transition based on intensive R&D and close collaboration with partners. As sustainability is one of the core value drivers of Heliox, it is with great pleasure that Heliox takes part in the NEON project.

Text from the former NEON website (original page).