Solestial, Inc.

We’re proud to be featured in Vention’s Demo Day, showcasing innovators transforming manufacturing with automation.

At Solestial, we’re scaling production of our radiation-hardened silicon solar technology for space: smarter, faster, and more sustainably.

Watch the full event: bit.ly/47ty8MD

We’re growing! 🚀

Please join us in welcoming our newest Solestians who joined the team in Q3.

Each of them brings unique talents to our mission of delivering affordable and scalable solar power for space. Together, we’re pushing the boundaries of what’s possible for space solar tech.

Process Engineer Jeff prepares silicon wafers for Solestial’s sputtering tool.

With customer demand for our solar cells and modules surging, our dedicated team continues to increase throughput to deliver the next generation of solar technology for space.

Innovation Zone Tenant Spotlight! ☀️ Meet Solestial ☀️   Born from groundbreaking research at Arizona State University, Solestial, Inc. is redefining what’s possible for silicon solar power in… | ASU... Innovation Zone Tenant Spotlight! ☀️ Meet Solestial ☀️   Born from groundbreaking research at Arizona State University, Solestial, Inc. is redefining what’s possible for silicon solar power in space....

We are honored to be featured by ASU Corporate and Economic Development on LinkedIn! A heartfelt thank you to the Arizona State University community, its people, and its programs for all the support!

bit.ly/4qbjqlS

Solestial is partnering with EnduroSat to power its next-generation ESPA-class satellite, FRAME, launching in 2026. Our radiation-hardened silicon solar modules will provide reliable, high-performance power in orbit. Read the complete announcement: bit.ly/3KFmXbM

Principal Engineer Sergey Nastachkin works on Solestial’s custom plating tank.

Copper plating isn’t new, but we’ve built a unique system for our silicon wafers, from process control to waste management.

Innovation is in both our solar cells and the tools we use to make them.

Solestial is hiring in Tempe, AZ:

🚀 Environmental Health & Safety Coordinator: bit.ly/4nf0GQr

🚀 Quality Manager: bit.ly/46hKpEq

Be part of the team building the next generation of affordable, durable, and scalable solar solutions for space.

One advantage of Solestial’s Si heterojunction tech (HJT) is its lower temp coefficient.

Compared to p-type diffused junction cells (PERC), Solestial degrades just -0.24% per °C, compared to -0.34%. At 80°C, our 20% cells deliver +1% absolute / +6% relative efficiency.

Solestial’s rad-hard silicon solar cells show no additional degradation compared to adjacent III-V cells after a year of continuous operation in LEO. Data from AVS shows that our modules are a cost-effective alternative to traditional II-V solar cells for space.

Exciting news: Solestial is the cover story in the September issue of Tech Briefs!

Read how our ultrathin, flexible silicon solar products are redefining affordable, durable, high-performance space power. 🚀 Read more: bit.ly/4mbuP1U

🚀 Excited to welcome Danny Field as Solestial’s new Vice President, Product and Programs! With 14+ years aerospace experience (D-Orbit USA, Astra, OneWeb), he’ll lead our customer programs and the roadmap for our next-generation space solar technology. Welcome, Danny!

From this POV, you can see how our fully automated wet etch processing hood will reduce solar wafer processing time by more than 50%. Once operational, this tool will enable Solestial to deliver more space-grade silicon solar cells, faster, to meet rising demand.

Check out one of our latest investments in scaling production: our fully automated wet etch processing hood! Once operational, this advanced system will cut solar wafer processing time by more than 50%, enabling us to deliver more high-quality solar cells faster than ever before.

Great to see our solar power modules at SmallSat integrated into MMA Space’s FlexArray! We partner with aerospace innovators to develop next-gen solar arrays — pairing our low-mass, high W/kg Si modules with our partners’ hardware to deliver power solutions for space missions.

We're here! | MMA Space™️ We're here! Come visit us in Booth 705 to see the FlexArray up close. And don't forget Spin to Win from 1-2 pm each day at Small Satellite Conference (SmallSat)! #space #innovation #flexarray #small...

At Small Satellite Conference? 🚀

See Solestial’s solar power modules integrated into MMA Space’s FlexArray! Our flexible modules make up the two rows at the bottom of the array. We work with many partners to create solar arrays that leverage our low-mass, high W/kg silicon modules.

bit.ly/3Jep1a7

We’re looking forward to Small Satellite Conference! Will you be in Salt Lake City from August 11-13? Schedule a meeting with Solestial CEO, Margo de Naray, and Luke Gordon, VP, Sales, to learn more about our rad-hard silicon solar technology for space applications: bit.ly/4lMJbXb

At Solestial, we believe in cultivating the next generation of talent. We're excited to announce that Ryan Gavette has joined us full-time as a Process Engineer! Ryan began his journey as an intern and recently graduated from @asuengineering.bsky.social. Congrats to the Class of 2025!

We are encouraged by the House Armed Services Committee's recognition of the critical national security imperative for domestic space solar production in the #NDAA. We look forward to collaborating with @DeptofDefense. Read more: bit.ly/4f2QmrD

Solestial Awarded $1.2M by SpaceWERX for Space Solar Development - Solestial TEMPE, Ariz., July 16, 2025 — Solestial, Inc. (“Solestial”), the solar energy company for space, today announced that it has […]

Solestial has been selected by SpaceWERX for a $1.2M Direct-to-Phase II contract to develop a novel, fast to manufacture, multiorbital solar array wing concept for small satellites. Read more in our press release: bit.ly/3UdWPGl

This 5.5 meter long, rollable integration was made using new manufacturing processes to produce larger, 1-meter-wide solar power modules. Our flexible solar cell technology improves total mass density and stowed volume while maximizing deployed array power density.

A group of people stand in a business office looking at a presentation.

Last week, we opened our doors for a special Friends & Family Open House. It was a wonderful afternoon filled with tours of our manufacturing space, presentations, food and drink, and plenty of fun as Solestians shared their work with the people who support them every day.

Our sputtering tool is a specialized in-line coater used to deposit thin films onto our solar cells. This behemoth is roughly 50x larger than the tool we used in our pilot production line!

📸: Pictured; Principal Engineer, Sergey

Two people in black shirts and baseball caps stand behind a large solar assembly. They are in a manufacturing facility and an American flag hangs on the wall behind them.

Luis and Sam, members of Solestial’s Module team, pose alongside our largest, most powerful delivery to date. This impressive assembly of solar blankets has been sent to our aerospace partner for rigorous third-party stress testing.

Three workers in yellow lab coats and blue booties move around a clean room. The workers are in motion in the still image and some appear blurry to indicate movement.

Many thanks to the Phoenix Business Journal for nominating Solestial as a finalist for the 2025 AZ Inno Fire Awards presented by the Arizona Commerce Authority. The awards celebrate startups and founders in AZ’s tech and innovation ecosystem. bit.ly/4jtrEBc

Three men stand over a table looking at a Solestial flexible solar power module.

We were thrilled to host visitors from York Space Systems. 📸 from right: Solestial’s Stan Herasimenka shows York’s Mike Lajczok and Francisco Hansen the new, larger form factor flexible solar power modules Solestial is developing to support rapidly scaling production capacity.

Mitsubishi Electric’s ME Innovation Fund Invests in U.S. Startup Solestial | MITSUBISHI ELECTRIC Global website Improving the competitiveness of its space business through advanced silicon-based solar cells for space applications

Excited to share Mitsubishi Electric’s press release announcing its investment in Solestial!

www.mitsubishielectric.com/en/pr/2025/0...

A Community of Innovators - Solestial Open Positions Life at Solestial As a member of the Solestial team, you will be part of a collaborative environment […]

On the heels of our $17M Series A funding round, we are recruiting three key positions: VP of Operations, VP of Product & Programs, and Quality Lead. Join our team as we scale our breakthrough solar technology for space! Read more: solestial.com/careers/

Solestial Announces $17M Series A Funding Round to Scale Space Solar Manufacturing - Solestial Series A funding led by AE Ventures; Margo de Naray joins Solestial as CEO TEMPE, Ariz., Thursday May 15, 2025 […]

Solestial has closed a $17M Series A round led by AE Ventures. Alongside the raise, we are thrilled to announce the appointment of Margo de Naray as CEO. Founding CEO, Stan Herasimenka, will assume the role of CTO. Read the complete press release: bit.ly/3F5BrPW

At Space Power Workshop, Stan Herasimenka presented Solestial’s work on flexible Si solar power modules compatible with next-gen roll-out arrays
☀️ Modules have a 5cm bend radius
☀️ They are low mass, reducing payload weight and launch costs
☀️ We work with many array partners

Solestial’s Vince Hearn joined customers at the Space Jam Launch Party, a Space Symposium event created by Atomic-6 and co-sponsored by Solestial, TRL11, Starpath Robotics, Portal Space Systems, and CisLunar Industries.

📸 Vince with attendees and CisLunar Industries' Tesla Lightning Gun