Reliability Test Engineer

Lunar Energy is seeking Reliability Test Engineers to validate their home energy products. Responsibilities include end-to-end testing of power converters and battery systems, collaborating with cross-functional teams, and automating tests with Python. Candidates should have a degree in engineering, strong electronics fundamentals, and experience with testing equipment. The role focuses on continuous improvement and data analysis to enhance product reliability in a sustainable energy context.
Reliability Test Engineer (Various Levels)


Reliability Test Engineers at Lunar Energy will be responsible for ensuring the validation of the product throughout the entire lifecycle of our revolutionary home energy products. We are looking for people who are passionate about a more sustainable and energy independent future and want to make that vision a reality. An ideal candidate is someone who is curious, enjoys being hands-on and is comfortable with engineering in cross-functional disciplines.


Lunar Energy was founded to transition homes to 100% clean energy—making our electricity greener, our air cleaner and our energy more safe, secure and reliable for all. We’re a fast-growing, global company building the world’s best clean energy products to electrify all homes and connect communities to form clean, resilient virtual power plants.


On a given day at Lunar, you’ll likely…



Own the end-to-end testing activities for Lunar’s power converters (inverters, DCDC converters…etc) and battery systems — from test planning and test stand development to execution, data analysis, and reporting.
Engage with electrical, mechanical, and firmware engineers to develop comprehensive test plans that validate system performance.
Design and develop test stands for electrical, thermal and mechanical testing.

Define test stand architecture, specify appropriate test equipment and instrumentation
Collaborate with technicians to design and fabricate test stands.
Write Python scripts to automate testing and process large test datasets

Help drive failure analysis for failures originating from testing, assist in failure analysis for failures originating from the field

Extract key insights from test/field data to uncover insights and guide root cause
Recreate failure modes using physics-of-failure principles
Coordinate steps with FA lab for further analysis

Clearly document and communicate test results with crossfunctional team members, identify key insights and provide engineering recommendations from test data
Contribute to continuous improvement of test infrastructure — from enhancing software tools to developing custom test equipment.
Maintain a clean, safe, and organized environment for testing high-voltage systems

Desired Skills:



Bachelor’s degree in electrical engineering, mechanical engineering or engineering physics required. Concentration in mechatronics/robotics is a plus.
Strong fundamentals in electronics/circuit analysis, heat and mass transfer and static/mechanics of materials required
Experience with electrical test equipment like power supplies, data acquisition systems…etc as well as standard electrical diagnostic tools such as multimeters, oscilloscopes….etc required
Python or equivalent programming experience required. Experience with object oriented programming, state machines and test automation is a plus
Basic mechanical design experience/familiarity with CAD software is a plus
Experience working with power electronics or battery systems testing is plus
Strong sense of curiosity and ownership

Benefits:


We’re dedicated to creating a remarkable employee experience. At Lunar, competitive base pay is one part of our total compensation package. Lunar employees also have the opportunity to become Lunar shareholders by getting equity in a fast-growing company and participating in our employee stock program.


Additional benefits include:



Medical, dental, and vision insurance for employees and dependents
Flexible Paid Time Off plus 10 paid holidays
Tax deferred 401(k) plan
Paid parental leave for all full time employees including 12 weeks paid parental leave for the birthing mother and 6 weeks paid parental leave for the non-birthing parent
Subsidized EV charging and pre-tax commuter benefits

Our DE&I Philosophy: Lunar Energy is an equal opportunity employer. We are committed to attracting, developing and retaining diverse talent by supporting an inclusive workplace. Lunar recruits, hires, trains, promotes, compensates, and administers all personnel actions without regard to race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, disability status or any other status protected by applicable law.


Our Compensation Philosophy: Our goal is to ensure that all Lunar Energy employees are fairly compensated. Please note that the salary range information that follows is a good faith estimate for this position provided pursuant to the Pay Transparency for Pay Equity Act for California applicants. The salary range estimate for this position depending on level of experience is: $120,000 - $165,000 USD.


The actual offer, reflecting the total compensation package & benefits, will be at the company’s sole discretion, and determined by factors including but not limited to years of experience, job level, geographic location, and other relevant business considerations. The company also reserves the right to amend or modify this job description, employee perks, and benefits at any time.


Job posting details for Reliability Test Engineer at Lunar Energy in Mountain View, CA. Compensation / salary range: $120,000 - $165,000 USD. ClimateTechList gathers 9,000+ job openings from over 546 climate tech companies and updates them daily.