Archive · 14 Jun 2025
Why the Automotive Industry is Moving to 48V Mild-Hybrid Systems
Cars are changing to use a different kind of electricity system called 48V instead of the older 12V system.
This is because new cars have lots of gadgets that need more power.
The 48V system is like giving the car a stronger electrical heart, making it work better and use less gas.
It also helps the car do cool things like saving energy when you slow down.
This change helps cars meet new rules about pollution and get ready for even more advanced technology in the future.
Think of it as upgrading from a regular bike to an e-bike – it's faster and more efficient!
48V mild-hybrid systems offer better fuel efficiency and performance boosts compared to 12V systems.
The automotive industry is shifting from 12V to 48V systems due to stricter emission standards and the increasing power needs of modern vehicles.
48V systems can power advanced features like ADAS and sophisticated infotainment systems more effectively.
48V systems improve efficiency, reduce energy losses, and enable more effective regenerative braking.
48V systems offer a cost-effective path to vehicle electrification, enhancing fuel efficiency and preparing for future technological advancements.
- Who
- Automakers like Audi, General Motors, Volvo, Toyota and others.
- What
- The transition from 12V to 48V mild-hybrid systems in cars.
- When
- The transition is ongoing, with initial adoption around one and a half decades ago.
- Where
- Global automotive industry.
- Why
- To improve fuel efficiency, reduce emissions, and meet the increasing power demands of modern vehicles.
- Primary purpose of 12V system
- Power car accessories, and engine start/stop.
- Common 48V components
- 48V lithium-ion battery, electric motor/generator, DC/DC converter.
- Typical 48V system power output
- 15 to 20 kW, up to 50 kW in some cases.
- Advantage of 48V over 12V
- Higher power output with lower current, enabling thinner wiring and reduced losses.
- Key benefit of 48V systems
- Improved regenerative braking.
- Example 48V mild-hybrid vehicle
- Toyota Fortuner and Legender Neo Drive variants.