Development Engineer Battery Storage Systems C&I (f/m/d)


Wildpoldsried, BY, DE

Stellen-ID:  2368

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.

Make the world green again!


  • Participation in the design and dimensioning of system solutions for stationary storage systems
  • Integration of system components such as inverters into battery storage systems
  • Creation of requirements specifications, test specifications and test reports
  • Planning and preparation of design FMEAs and risk assessments
  • Participation in ensuring technical solutions in the battery storage system
  • Selection and design of electronic components as well as creation of specifications for mechanical design



What you will need for that


  • Completed studies in electrical engineering, mechatronics or a similar discipline
  • Knowledge in the field of inverters and especially battery inverters preferable
  • First professional experience ideally in the field of battery components desirable
  • Ideally practical experience in the development of series projects 
  • Flexible and independent way of working under changing priorities in the development area 
  • Self-initiative, self-organized, yet with the ability to work in a team 
  • Fluency in english and ideally in german

What you can expect at sonnen:

  • An atmosphere of openness, tolerance and mutual respect, where innovation is expected and encouraged
  • The option of working full- or part-time for every position
  • 30-32 days annual vacation with increasing team membership
  • Leasing of company (e-)bikes with up to 40% discount
  • Flexible working hours and option working mobile
  • Mental health and wellbeing offering for you and your family members
  • Free German, English as well as online yoga and body art courses
  • Soft drinks, fruits and cereals in our offices
  • Use of sports memberships (EGYM Wellpass, only €29.75/month) and discounts for other services and products 
  • Employee discount on our electricity tariff
  • 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!