The most expensive part of a solar farm isn't the panels anymore. It's the people who have to get down on their hands and knees, thousands of times, to bolt them all together. Charge Robotics, a startup from Oakland, thinks the answer isn't more people. It's a factory you can ship to the middle of a cornfield.
Founded in 2021 by MIT mechanical engineering alumni Banks Hunter and Max Justicz, Charge Robotics builds portable assembly lines and robotic vehicles designed to automate the most labor-intensive parts of constructing large, ground-mounted solar farms [MIT News, Mar 2025]. Their system takes in racking, mounting hardware, and photovoltaic modules, assembles them into pre-fabricated "solar bays," and then uses a robotic vehicle to place those bays in the field. The only manual step left, they claim, is pile driving the foundational posts into the ground [MIT News, Mar 2025].
A factory on a flatbed
The core product is a logistics hack. Instead of shipping fully assembled solar arrays, which is bulky and inefficient, or assembling everything by hand on-site, which is slow and expensive, Charge Robotics ships its compact assembly system. Once on location, the equipment acts like a miniature, automated manufacturing plant. Machine vision systems scan common solar parts and panel sizes to ensure quality and compatibility, feeding components into the assembly line [MIT News, Mar 2025]. The output is a sequence of pre-assembled bays, ready for the companion robotic vehicle to pick up and position. The bet is that this on-site automation can slash installation time and cost, directly addressing a critical skilled-labor shortage in the industry.
Why utilities are listening
The timing for this kind of mechanization is not accidental. Solar power is now often the cheapest form of new electricity generation, but the industry's growth is increasingly constrained by the sheer physical labor required to install it. Utility-scale solar developers and Engineering, Procurement, and Construction (EPC) firms face tight margins and unpredictable schedules, making any technology that promises faster, more predictable builds highly attractive. Charge Robotics has already tested its concept with SOLV Energy, one of the largest solar installers in the U.S., in a prototype deployment that began after discussions starting in 2022 [pv magazine USA, Mar 2025]. That successful pilot helped the company secure $22 million in funding for its first commercial deployments in early 2025 [MIT News, Mar 2025].
The team and the traction
Hunter and Justicz took a notably hands-on approach to founding the company. Before designing their system, they worked to assemble utility-scale solar parts themselves, aiming to intimately understand the workflow bottlenecks [MIT News, Mar 2025]. Justicz, who serves as CTO, brought a background in Electrical Engineering and Computer Science from MIT, while Hunter leads as CEO [Y Combinator, May 2026]. The company, which graduated from Y Combinator, has grown to a team of around 20 employees based in Oakland [Exa, May 2026]. Their traction is measured in partnerships and capital: following the SOLV Energy pilot, they have raised a total of $39.1 million across four funding rounds to scale their operations [Exa, May 2026].
| Founder | Role | Background |
|---|---|---|
| Banks Hunter | Co-Founder & CEO | MIT Mechanical Engineering ('15) [MIT News, Mar 2025] |
| Max Justicz | Co-Founder & CTO | MIT Mechanical Engineering ('17), former finance executive [MIT News, Mar 2025][Bloomberg, Jul 2018] |
Where the wheels could come off
Building heavy machinery for rugged outdoor environments is a famously hard business, and Charge Robotics faces several credible risks as it moves from prototype to commercial rollout.
- Deployment complexity. Each solar farm site is unique, with varying terrain, weather, and logistics challenges. Ensuring the portable factory system is robust and adaptable enough to work reliably across hundreds of acres of uneven ground is a significant engineering hurdle.
- Customer adoption inertia. Large EPCs operate on thin margins and tight deadlines. Integrating a new, unproven robotic system into a complex construction workflow carries operational risk. The value proposition on paper must translate to flawless execution in the field to overcome inherent conservatism.
- Capital intensity. The company has already raised nearly $40 million to build and deploy its first commercial systems [Exa, May 2026]. Scaling manufacturing and field service will require even more capital, making future fundraising rounds critical. The unit economics of each deployed system will need to justify that continued investment.
The company's most plausible answer to these risks is the validation from its pilot with SOLV Energy. A partnership with a major installer provides not just a testimonial, but real-world data on performance and reliability that can be used to convince the next customer.
The next twelve months
The coming year is about moving from a promising prototype to a repeatable commercial product. The $22 million raised in early 2025 is earmarked for these first commercial deployments [MIT News, Mar 2025]. Key milestones to watch will be the announcement of its first paid commercial contract beyond SOLV Energy, any data released on installation speed or cost savings achieved, and likely another fundraising round as it looks to scale manufacturing.
On a back-of-the-envelope basis, the arithmetic is compelling. If a traditional crew installs a certain number of panels per day, and Charge Robotics's system can double or triple that rate with a smaller crew, the labor savings alone could pay for the hardware over the life of a large project. The real test is whether those theoretical savings survive contact with mud, supply chain delays, and the general chaos of a construction site. To succeed, Charge Robotics must prove its portable factory is not just a clever prototype, but a more reliable and predictable partner than the seasoned foreman it aims to augment.
Sources
- [MIT News, Mar 2025] Charge Robotics makes solar projects cheaper, faster with portable factories | https://news.mit.edu/2025/charge-robotics-makes-solar-projects-cheaper-faster-portable-factories-0312
- [Y Combinator, May 2026] Charge Robotics: Robots that build solar farms | https://www.ycombinator.com/companies/charge-robotics
- [Exa, May 2026] Charge Robotics: Funding, Rounds, and Investors Overview | https://websets.exa.ai/websets/directory/charge-robotics-funding
- [pv magazine USA, Mar 2025] MIT-based startup launches solar construction robotics system | https://pv-magazine-usa.com/2025/03/17/mit-based-startup-launches-solar-construction-robotics-system/
- [Bloomberg, Jul 2018] JPMorgan Banker to Billionaires Joins UBS for Family Office Team | https://www.bloomberg.com/news/articles/2018-07-12/jpmorgan-banker-to-billionaires-joins-ubs-for-family-office-team