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: https://t.co/qvGG6QxpD8

Our vision for rad-hard, lightweight Si PV for space is taking shape! Solestial now produces 1-meter-wide flexible solar power modules. The next generation of our flight-proven design will fly in early 2026 and advances scalable power for the next generation of spacecraft.

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 rad-hard Si solar tech for space: smarter, faster, and more sustainably. Watch the event: https://t.co/6BeBLL8eeN

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.

Don't miss Vention's Demo Day 2025! Solestial will be featured in their showcase video highlighting innovators transforming manufacturing with automation. Registration link:

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.

We are honored to be featured by ASU Corporate and Economic Development on LinkedIn! A heartfelt thank you to the @ASU community, its people, and its programs for all the support! https://t.co/k76GtbxHQ5

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: https://t.co/Yk0ZQvTRcJ

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: https://t.co/QIqc7KqaRs 🚀 Quality Manager: https://t.co/RisAWZcb5W 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_engineering 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 @TechBriefsMag! Read how our ultrathin, flexible silicon solar products are redefining affordable, durable, high-performance space power. 🚀 Read more: https://t.co/pwFmXCFvyU

At just 0.3 mm thick with a mass density of 280 g/m² (340 g/m² in production today), Solestial’s ultrathin silicon solar modules hit 800+ W/kg specific power, 3-5x higher than other affordable silicon space tech. Why it matters: 🚀 lower launch costs 🚀 more power, less mass

🚀 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 @mmaspaceco’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.

At the @SmallSat? 🚀 See Solestial’s solar power modules integrated into the @mmaspaceco FlexArray! Our modules make up the two rows at the bottom. We work with many partners to create innovative solar arrays that leverage our low-mass, high W/kg silicon solar power modules.

We’re looking forward to @SmallSat! 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: https://t.co/HmLzCwCSP7

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. Congrats to the Class of 2025!