February 20, 2026: Clarios has announced plans to use its Meadowbrook plant in Michigan as an assembly site for supercapacitor systems.

The February 12 announcement came less than a year after Batteries International reported that Clarios was evaluating sites in the US for a next generation technology campus anchored by new supercap system production.

The lead battery giant followed that last November by acquiring supercap manufacturer Maxwell Technologies from California-based UCAP Power for an undisclosed sum.

Clarios’s supercap systems — also commonly referred to as ultracapacitors in certain original equipment manufacturer applications — are designed for 12V and 48V automotive architectures.

They provide rapid charge discharge performance and enhanced reliability for critical functions such as steer-by-wire, chassis stabilization, voltage stability and redundancy, particularly when paired with AGM batteries.

Clarios said they also serve as a “foundational building block” within integrated power and stability architectures increasingly adopted across the industry, which is in line with the company’s systems-oriented approach to low-voltage energy management.

Details of assembly operations and capacities were not disclosed, but Clarios said the site would build on the capabilities of Maxwell Technologies — which now operates as an independent business unit within Clarios.

Maxwell was previously owned by Tesla, which finalized its purchase of the firm in 2019. Tesla sold Maxwell to UCAP two years later.

Clarios CEO Mark Wallace said Meadowbrook would strengthen the firm’s US manufacturing capabilities and bolster the domestic supply chain for its customers.

“This step underscores our commitment to localized production and to delivering advanced, high-performance energy storage systems.”

In March 2025, Clarios unveiled a 10-year, $6 billion plan to expand battery manufacturing and help boost US energy and critical minerals independence.