Our mission
Democratize e-mobility with high performance Lithium-ion batteries.
Fully charge your car in 5 min
The mass-market of the electric vehicle will go through a use close to a thermal vehicle. It is therefore essential to improve battery life and reliability.
The advantages of E-MERSIV Lithium-ion batteries
-
- Ultra fast charge
- Superior autonomy
- Increased security
- Improved battery life and reliability
The steps
E-MERSIV master plan by 2025:
- Race cars
- Premium cars
- All cars

Fully charge your car in 5 min
The mass-market of the electric vehicle will go through a use close to a thermal vehicle. It is therefore essential to improve battery life and reliability.
The advantages of E-MERSIV Lithium-ion batteries
-
- Ultra fast charge
- Superior autonomy
- Increased security
- Improved battery life and reliability
The steps
E-MERSIV master plan by 2025:
- Race cars
- Premium cars
- All cars

Battery cooling by immersion of the cells
The thermal management of a battery is essential for all its performance: recharge time, power density and energy, aging and of course safety.
Standard technology on the market – cold plate cooling with water–glycol – can cause short circuits and has a limit on recharge time performance.
E-MERSIV batteries use a dielectric fluid in direct contact with cells with heat exchange up to 100 times more efficient than water-glycol.
Its BMS are designed and configured to ensure a maximum level of safety for the batteries and optimize their performance: autonomy, lifetime, consumption, thanks to the ability to set up the algorithms very precisely.
Technological expertise serving the energy transition
E-MERSIV brings together the unique know-how of 2 companies and 50 experts:
- Startec Developpement, expert in the manufacture of battery packs and groundbreaking BMS for more than 20 years.
- Exoès, expert in thermal management for more than 10 years.
“Together, we are providing a response to the necessary reduction in transport emissions”, Arnaud Desrentes CEO of Exoès and Thomas Debuisser CEO of Startec Développement.
Technological expertise serving the energy transition
E-MERSIV brings together the unique know-how of 2 companies and 50 experts:
- Startec Developpement, expert in the manufacture of battery packs and groundbreaking BMS for more than 20 years.
- Exoès, expert in thermal management for more than 10 years.
“Together, we are providing a response to the necessary reduction in transport emissions”, Arnaud Desrentes CEO of Exoès and Thomas Debuisser CEO of Startec Développement.


Specialty EVs and industrial vehicles
E-MERSIV also provides its know-how for the development of specialty EVs vehicles, industrial and aeronautical projects, as well as for buses, trucks, construction and agricultural vehicles.

Specialty EVs and industrial vehicles
E-MERSIV also provides its know-how for the development of specialty EVs vehicles, industrial and aeronautical projects, as well as for buses, trucks, construction and agricultural vehicles.