The future demands that today’s vehicles evolve. Each generation of vehicles is more intricate, connected and automated. Automotive leaders face a multitude of challenges—they must deliver more sophisticated performance for their customers, improve safety, meet environmental regulatory requirements such as lowering CO2 emissions, and keep up with electrification trends.

Maxwell Technologies supports the ascent to the next tier of automotive innovation by providing our proprietary ultracapacitor cell technology for additional efficiency and value in the vehicle. Ultracapacitors, with their high-power performance and resiliency in rugged environments, offer fast-responding energy storage for demanding applications that in many cases cannot be achieved by batteries alone.

Discover how a partnership with Maxwell can enhance performance, reliability and quality in the next generation of advanced automobiles.

Automotive leaders build with our solutions.

General Motors
Continental AG


Explore where we enhance vehicle performance.

Continental designed-in our ultracapacitor technology for the voltage stabilization system supporting start-stop in Lamborghini and PSA Peugeot Citroën models, and that’s only the beginning. Automotive leaders are pushing the boundaries of what the vehicle can attain experientially and mechanically. Complex, high-power applications become possible with our solutions.

Maxwell’s ultracapacitors relieve vehicle batteries from high current, repetitive cycling for seamless engine restarts.


Regenerative energy recovery
In regenerative systems, energy is captured, stored and re-used at a later time. Maxwell’s ultracapacitors have superb efficiency rates for this specialized application.


Power assist hybrid electric vehicles
In mild and full hybrid vehicles, ultracapacitors can reduce battery drain and lengthen battery life.


Short-term backup power
The car of the future will be dependent on sensor technology, which requires backup power in the event of battery failure. Ultracapacitors are an ideal solution for reliable system redundancy.


Peak power assist for high power functions
Power demands are increasing in the automobile, and batteries cannot meet all the requirements for these demands. Maxwell fills the performance gap for peak power applications such as boardnet stabilization and electric power steering.


Industry leader in ultracapacitor technology design.

Unmatched quality

Developing technology for the automotive industry is no easy task. Our solutions pass rigorous industry requirements and are automotive-quality certified.

Hybrid-capable system design

In the face of issues with batteries’ performance in low temperatures, ultracapacitors can augment battery efficiency in applications such as start-stop and e-turbo.

Proven performance

Today, 4.5 million drivers experience enhanced power performance with Maxwell’s integrated ultracapacitor technology.

Engineering and field support

Our application engineers bring extensive knowledge in full ultracapacitor storage systems and in hybrid approaches, working with you from concept to completion.

Patented manufacturing process

Our high-purity activated carbon and dry electrode manufacturing process is unequaled by competitors—and is the gateway to our power-dense ultracapacitors that support complex applications across industries.

Efficient and cost-effective

Current customers have achieved longer life, significant weight reductions, and reliable cold temperature performance with our solutions.

Contact Us

Contact us using the form below to request more information or to find out how ultracapacitors can work for your application.



In the Media

Maxwell Makes Big Auto Deal and Moves in Other Markets
San Diego Business Journal
Advanced energy storage
Electric & Hybrid Vehicle Technology International
CO2 einsparen, Batterie entlasten
Automobil Elektronik


Related Articles

Where are Ultracapacitors Used in Automotive?
Do you know where ultracapacitors are used in the automobile? Find out in this video.

Read More >


The Key to Vehicle Electrification: Hybrid Energy Storage Systems
As countries look to create cleaner environments, automakers can achieve stricter fuel emissions standards with the help of ultracapacitors.

Read More >


The Battery Show: Where the Energy Storage Industry Converges
At the 2017 show, Maxwell Technologies featured a variety of ultracapacitor (supercapacitor) solutions, including a visual demonstration of the K2 cells and our 48-volt modules for hybrid diesel electric buses, rail wayside energy storage systems and grid applications.

Read More >