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Lunar Energy

Mechanical Engineer Intern

Become a Mechanical Engineer Intern at Lunar Energy in Mountain View, California. Contribute to failure analysis, design iteration, and quality support for innovative home energy products. Enjoy hands-on experience with a dedicated team and mentorship while working on sustainable solutions.
Lunar Energy
Lunar Energy
Mountain View, California, United States On-site Internship USD 30–35 per hour UTC-08:00

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).

Contact


Last updated on 2026-02-16 | Report an issue

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.

As a Mechanical Engineering Intern for Lunar's Mechanical Design Team you will be responsible for failure analysis, design iteration and quality/manufacturing support within our revolutionary home energy products. We are looking for people who are passionate about a more sustainable future and want to make that vision a reality. An ideal candidate is excited and ready to collaborate closely with and learn from a small, dedicated team, supported by a committed mentor. Engineers at Lunar are hands-on and involved in a wide range of facets of the product, from applying fundamental physical principles in design to working with high-volume production suppliers.

On a given day at Lunar, you'll likely...

  • Work back and forth with collaborators across the company to continuously refine and improve our understanding of how our products can create the greatest impact, get to market quickly, and operate reliably for our customers
  • Brainstorm and evaluate new solutions, weigh pros and cons, and present recommendations to leadership
  • Efficiently test ideas and designs: anything from back-of-the-envelope calculations to physical tests and multi-physics simulations
  • Design high-performance, reliable, low cost parts and assemblies, employing a variety of high-volume manufacturing processes
  • Create 3d models, drawings and other part specifications
  • Create prototype parts or fixtures utilizing on-site resources including 3D printing, laser cutting, milling
  • Define manufacturing processes and inspection methods
  • Collaborate directly with part manufacturers to support prototypes and production hardware
  • Engage with subject matter experts and material suppliers to build up a knowledge base on specific manufacturing processes

Desired Skills/Experience

  • Mechanical Design
    • Extensive experience in 3D Modeling software (e.g. Onshape, NX, Solidworks)
    • Fundamental knowledge of 2D Drawing creation and tolerancing (GD&T experience valuable)
    • Basic ability to analyze designs using Statics/Load Path Analysis, Finite Element Analysis, and Tolerance Analysis
    • Prototyping skills using 3D printing, machining, sheet metal bending, laser cutting, and general machine shop tools
  • Manufacturing Support
    • Ability to manage communication with multiple suppliers in parallel in a timely and organized manner
    • Experience working with contract manufacturers (domestic or international) to make product improvements during a production phase
    • Preferred: Experience communicating with component suppliers including Design for Manufacturing report review and First Article Inspection
  • Communication
    • Skilled at clear verbal and written communication including concise slide deck creation and email correspondence
    • Ability to generate detailed design documentation
    • Ability to give kind and direct feedback and receive feedback with an open mind

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: $30 - $35 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.

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About the role

February 18, 2026

Internship

Company

February 18, 2026

On-site

USD 30–35 per hour

Solar Energy

Lunar Energy

lunarenergy.com

  •  Mountain View, California, United States

Intern level, preferred skills in mechanical design and prototyping

UTC-08:00

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