Clarios acquires Maxwell

On-Board Network Clarios Acquires Maxwell Technologies

2025-11-17 From Sven Prawitz | Translated by AI 1 min Reading Time

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The low-voltage battery manufacturer has acquired Maxwell. With this move, Clarios aims to strengthen its position in high-performance short-term storage.

Process of manufacturing battery cells in battery plants(Image: Clarios) — Process of manufacturing battery cells in battery plants
(Image: Clarios)

Clarios has announced the acquisition of Maxwell Technologies. Maxwell manufactures supercapacitor cells and modules for mobility, grid, and on-site power applications, including data centers. The company did not disclose financial details. Clarios plans to operate Maxwell as an independent U.S. business unit.

The move, according to their own statements, strengthens Clarios' position in high-performance short-term storage. Unlike conventional batteries, supercapacitors charge and discharge energy almost instantaneously—ideal for storing excess energy and supporting systems during sudden demand peaks. The components achieve up to one million cycles, operate in extreme temperatures (–40 °F to +149 °F), and require neither maintenance nor fire protection measures, according to the statement.

First Series Order for Supercapacitors

At the beginning of the year, Clarios described its expansion into the field of supercapacitors in the context of the CES "Automobil Industrie." The supplier will equip the 12-volt and 48-volt electrical systems of a car manufacturer. With the Maxwell acquisition, the company aims to establish a stable supply chain.

Maxwell Technologies brings decades of development experience in supercapacitor systems. With over 85 million cells delivered and applications in U.S. power generation, grid stabilization, automotive, transportation, and industrial automation, Maxwell's technology, according to the company, enhances Clarios' ability to offer next-generation storage systems.

"The integration strengthens our automotive customer relationships and creates long-term opportunities to grow in non-automotive segments," explains Mark Wallace, CEO of Clarios. He highlights Maxwell's existing customer relationships in data centers, grid applications, military, and industrial sectors.

About Clarios

Clarios operates a production facility for 12-volt vehicle batteries in Hannover, Germany. The operation traces back to the Akkumulatorenfabrik Hannover, or AFA, which was renamed Varta AG in 1962. In 2002, Johnson Controls acquired the battery manufacturer and sold it in early 2019 to Brookfield Business Partners, who founded the company Clarios. To this day, the company uses the Varta brand name for its starter batteries. Globally, the company employs 18,000 people in more than 100 countries.

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