About Kempower

Kempower is a member of Kemppi-Group. Kemppi-Group is best known from the global welding machine brand Kemppi. Since 1949 Kemppi has delivered thousands of welding machines. In 1977, the group introduced the very first inverter-based DC power source in the world.

As other applications regarding DC power became more interesting, Kempower was founded originally in the 90’s to target the non-welding part of the DC power source market. The most famous reference from the project was the CERN particle accelerator where Kempower delivered almost 1000 pcs of 2000 A power sources and received the supplier of the year award.

In 2009, the project business ended due to several reasons and the Kempower technical team was transferred to work as the research department of Kemppi. One research area was new businesses – and it included EV charging.

After several studies and piloting projects in Finland with 20 kW CHAdeMO fast chargers in 2014-2017, Kemppi Group decided to restart Kempower in the autumn of 2017 as an independent company from Kemppi Welding with 100% focus on EV charging.

Official operation started in 2018. The core technical know-how from both Kempower special projects and Kemppi research department formed the backbone of the team. This would be the beginning of creating technology that Defines Charging.

Our values

  • Together

    Teamwork across borders creates success. It brings joy in everything we do.
  • Impact

    Our passion is to help customers move towards an emission-free future. We are driven by customer success.
  • Integrity

    Responsibility, sustainability, and honesty are our building blocks of integrity.
  • Courage

    As a pioneer, we have the courage to think and act differently. We constantly learn.

Kempower in numbers

  • 2017

  • 65.8M€

    Revenue Growth Q1-Q3/2022
  • 300+

  • ~30


The perfect combination of fresh ambition and years of knowledge

Kempower’s heritage

The Kempower story started in 1949 when Martti Kemppi and his brother founded Veljekset Kemppi Oy, later also known as Kemppi Oy, a manufacturer of premium welding power sources.

Business was strictly welding, but between 2012 and 2018 it became clear that the future was electric and, since Kemppi already had years of knowledge in charging solutions, Kempower Oyj was founded.

We continue in the footsteps of Kemppi in perfecting infrastructure worldwide, but now with electrification and reliable EV charging solutions. We manufacture all our EV chargers in our factories in Lahti, Finland – side by side with Kemppi welding power sources.

2012 – 2013

An internal research project aimed at getting the most out of Kemppi potential investigates the possibility of developing a DC fast charger which converts welding technology into charging technology.


Development of the first Kempower DC charger in cooperation with Ensto. Several pilot charging stations established in the Lahti region.


Market insight research and competitor analysis combined with product development preparations.


Kempower founded in autumn 2017 and added to the Register of Companies.


Operational kick-off January 2018. Team building and technological development.


Technological product development and preparations for market entry. First product on the market – The Kempower T-Series Charging Trolley Q2/2019.


Launch of the Kempower charging solutions family.  Charging solutions that are built to last. Several electric mobility pilot projects for both heavy-duty industry applications, as well as personal traffic charging solutions and services.