Battery Test and Characterization Engineer - New Grad (E)

University Petaluma, California


Our mission at Enphase Energy is to advance a sustainable future for all! 

Today, our intelligent microinverters, which turn sunlight into an affordable, safe, reliable, and scalable source of energy, work with virtually every solar panel made, and when paired with our award-winning smart battery technology, we engineer one of the industry's best-performing clean energy systems, starting with developing our own semiconductors, electronics, system solutions, mobile apps and even cloud solar design services. To date, we have produced more than 36 million microinverters that make up more than 1.5 million homes across 130 countries!  

Like our customers, our innovative teams are also worldwide, making Enphase Energy a truly global company. We are one of the fastest growing and most dynamic energy companies in the world. Nimble and acutely focused on developing ground-breaking solar energy management technology, each of our teams have a shared goal of creating a carbon-free future. 

At Enphase we are also committed to diversity and inclusion. Developing innovative technology requires a workforce as diverse as the populations we wish to serve. We are a values-driven company that puts people and their power at the center of our shared energy future.

We are seeking a battery test an characterization engineer who will work on our energy storage products, under the Storage Business Unit (SBU) division.

The Role 

As a test and characterization engineer, the successful candidate will be part of the battery R&D team that is responsible for performing cell and module testing for design validation, BMU/BMS algorithm, failure analysis, and compliance support.

In this role the successful candidate will:

  • Prepare testing plans according to requirements.
  • Execute DOEs according to requirements.
  • Create / Modify the test setup which includes the electrical connections, mechanical fixtures, and sensor installation.
  • Summarize the test results as test reports for documentation and cross-functional review.
  • Participate in future product development discussions

Credentials/Technical Capabilities:

  • Pursuing BS/MS/PhD Mechanical Engineering, or Electrical Engineering, or Chemical Engineering.
  • Exposure to testing Lithium-ion Battery cells and modules.
  • Exposure to battery testing equipment, such as Arbin, Macro, et al.
  • Exposure to Lithium-ion Battery electrical performance testing, safety testing, and reliability testing.
  • Exposure to module dissection and assembly.
  • Demonstration of good understanding of basic Lithium-ion battery technologies.
  • Good communication skills.
  • Ability to work effectively within a team.
  • Desire and passion to change the world.

Desired Experience – the following skills will be advantageous:

  • Experience with Python or similar languages.
  • Hands-on experience with mechanical machine shops.
  • Hands-on experience with cell dissection and assemble.
  • Hands-on experience with SEM, TEM, XRD.
  • Hands-on experience with electrode coating/process.
  • Hands-on experience with cell assemble/manufacturing.


  • Occasional travel to our site in Fremont, CA.

Work location: 

  • Petaluma – CA. Candidate must be authorized to work in the US. 
  • This is an on-site job. Job cannot be performed remotely. 
  • Candidate must be able to perform physical activities, including, but not limited to: 
               Reaching, carrying objects, to above head level 
               Moving items 
               Using both hands to assemble detailed systems