Thesis - Battery Capacity Behaviour (f/m/d)


Wildpoldsried, BY, DE

Stellen-ID:  4450

At the earliest date possible we are looking for support for our #teamsonnen

Clean and affordable energy for all is one of the greatest challenges of our time. Sonnen has been committed to this mission since 2010 and is now represented in Europe, the USA and Australia with over 1,000 team members globally. In Germany, our offices are located in the beautiful Wildpoldsried (Allgäu) and the vibrating heart of Berlin Kreuzberg.

At sonnen, we are building the energy system of the future. To this end, we are developing new technologies and business models that have not existed before. Whether intelligent power storage, virtual power plants or digital services - we set the trends of a new energy world. That means, among other things, the inexpensive production and storage of renewable energy and the intelligent networking of producers and consumers. sonnen thereby gives people around the world the opportunity to become independent of fossil fuels and conventional energy supplier.

We are growing steadily and are looking for people who want to join us in our vision of clean and affordable energy for all while making a positive impact on climate change.

What this thesis will be all about:


Suggested Title: Capacity behavior during storage of battery modules


The thesis shall explore the behavior of battery module capacity during storage in different environments. The thesis shall focus on the possibilities for improvement in storage and the definition of safe frames and treatment methods.


  • What happens to the capacity during storage of our battery modules?
  • What does it look like on a timeline?
  • How big of a role does the environment play, e.g. temperature or humidity?
  • What is a critical duration of storage without re-charging?
  • How can storage be improved?
  • What instructions can we give the specialised partners?
  • How does the capacity behave at different SOC levels during storage?
  • Which SOC offers the safest storage?



What you will be doing at sonnen:


  • Familiarisation with all sonnenBatteries
  • Diagnose RMA‘s
  • Familiarisation with the battery modules
  • Supporting the Hardware Diagnostics Expert
  • Creating diagnostic instructions
  • Creating evaluations



What you should bring to the table:


  • Enrolled in a suitable technical study program in University / Applied Science Institute in Germany
  • You have the ability to communicate and collaborate with colleagues
  • Fluent in German and English

What you can expect at sonnen:

  • An atmosphere of openness, tolerance and mutual respect, where innovation is expected and encouraged
  • Flexible working hours and option working mobile
  • Use of sports memberships (EGYM Wellpass, only €29.75/month) and discounts for other services and products 
  • Free German, English as well as online yoga and body art courses
  • Soft drinks, fruits and cereals in our offices
  • Mental health and wellbeing offering for you and your family members
  • Regular team and company events
  • We love dogs! You too? Feel free to bring your fellow friend to our offices

You feel we are a match? Apply now and help us to shape the energy transition together. We look forward to welcoming you to #teamsonnen!

sonnen - energy is yours!