Reliability Test Intern
Lunar Energy
Company Overview
Lunar Energy
Mountain View, CA, United States
2020
Approximately 250 employees (source: lunarenergy.com).
What They Do
Lunar Energy is a pioneering renewable energy startup focused on electrifying homes through innovative clean energy products and virtual power plants. The company, founded by Kunal Girotra, a former Tesla Energy executive, aims to provide scalable solutions that allow homeowners to generate, store, and manage electricity efficiently. Their flagship product is a next-generation home battery system, which is part of a modular hardware ecosystem designed to facilitate the transition to 100% clean energy by replacing fossil fuel appliances with solar-compatible technologies such as heat pumps and induction cooking (source: cbinsights.com). Additionally, Lunar Energy integrates its hardware with Gridshare software, acquired from Moixa, to enable smart energy controls and aggregation into virtual power plants (VPPs) that connect thousands of home batteries for grid balancing (source: cleantechnica.com).
Projects & Track Record
While specific completed projects are limited as Lunar Energy focuses on product development, the company has made significant strides in integrating proven technologies from its acquisition of Moixa, which has managed extensive home battery fleets for smart charging and VPPs (source: investors.sunrun.com). The first home battery system was slated for market launch in late 2022, and ongoing efforts are centered on scaling manufacturing and partnerships with Sunrun for nationwide residential rollouts. Lunar Energy's geographical operations include its headquarters in Mountain View, California, and a software hub in London, UK, targeting U.S. residential customers first while eyeing global VPP expansion (source: cbinsights.com). Key clients include Sunrun, which serves as a lead investor and distribution partner, further solidifying Lunar's position in the renewable energy market.
Recent Developments
In the past two years, Lunar Energy has not disclosed any new funding rounds or major contracts following its emergence from stealth in 2022. The company continues to focus on product scaling and commercialization of its VPP solutions, with the 2022 $300 million funding raise and the acquisition of Moixa marking significant milestones in its early development (source: equityzen.com). Although press mentions in 2025 have referenced unrelated entities, Lunar Energy remains committed to its mission of home electrification and expanding its market presence through strategic partnerships and technological advancements (source: investors.sunrun.com).
Working There
Lunar Energy offers a dynamic work environment primarily focused on engineering roles, with approximately 250 employees engaged in hardware, firmware, software, product development, and R&D. The company actively recruits talent for its Mountain View headquarters and London office, emphasizing a mission-driven culture that attracts savvy entrepreneurs and passionate experts (source: lunarenergy.com). While specific benefits are not publicly documented, the company invites applications for various roles, highlighting its commitment to building a high-impact team dedicated to addressing climate challenges through home electrification (source: lunarenergy.com).
Last updated on Feb 23, 2026 | Report an issue
Job Description
Test Engineering Intern on the Reliability Testing team 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.
Lunar Energy is on a mission 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 recognized by Forbes as one of America's best start up employers in 2025. We're 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
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Perform and execute various types of testing as part of our hardware validation process.
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Design and build test stands for PCBA testing
- Thoughtful use of AI assistants and coding tools (e.g., Claude, Gemini...etc) in your engineering workflow - including good judgment about when outputs need verification, awareness of confidentiality practices and a strong vision on how to structure your test code
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Specify test stand equipment and instrumentation
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Work with technicians for designing and building test stands
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Write Python scripts to enable test automation and process data coming out of the test
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For test failures and field failures, aid failure analysis investigations and countermeasure validation with design team, reliability team and failure analysis lab
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Collaborate with electrical, mechanical and firmware engineers across the company to develop thoughtful test methodologies
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Analyze test data, write test reports and help extract important takeaways from the data
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Contribute to various test infrastructure improvement efforts (ranging from contributing new features and functions to the codebase, creating custom test equipment...etc)
Desired Skills
- Bachelor's degree in engineering in progress. Mechatronics or electrical engineering background preferred.
- Highly curious with hands-on project experience.
- Working knowledge of programming, Python and object oriented programming experience preferred.
- Working knowledge of electronics/circuit analysis required, working knowledge of statics/mechanics of materials and heat and mass transfer is a plus.
- Experience with test equipment like power supplies, multimeters, DAQs, various sensors/instrumentation...etc preferred.
- Familiarity with testing embedded/IoT systems or wireless communications (Wifi/mesh networks/BLE) is a plus.
- Basic mechanical design experience/familiarity with CAD software is a plus.
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 hourly 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 hourly range estimate for this position depending on level of experience is $25 - $40 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.
Apply now
Job expired?Please let Lunar Energy know you found this job on Rejobs. This will help us grow and get more people to work on renewable energy!
Apply now
Job expired?Please let Lunar Energy know you found this job on Rejobs. This will help us grow and get more people to work on renewable energy!
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About the role
May 15, 2026
Internship
Company
- Mountain View, California, United States
Internship level, pursuing a Bachelor's degree
UTC-07:00