Solestial
AcquiredThe Next Generation of Silicon Photovoltaics for Space Has Arrived.
Tempe, United States · Founded 2019 · $30.8M raised
- Headquarters
- Tempe, Arizona
- Employees
- 11–50
- Founded
- 2019
- Business Model
- B2B
- Website
- solestial.com
- Total Funding
- $30.8M
- Last Round
- $1.2M GrantMay 2025
- Rounds
- 6
- Acquisition Date
- Jun 2026
Totals include recorded grants and other qualifying funding, not just equity. What counts toward funding.
About
Solestial develops next-generation silicon heterojunction solar cells and flexible solar power modules for small satellites and spacecraft. Its proprietary low-temperature annealing technology allows solar cells to self-heal radiation damage at operating temperatures, making them the only silicon solar products on the market with this capability. The company serves commercial and government customers including Boeing, NASA, and the Air Force Research Laboratory.
Summary
Solestial is a Clean Tech company based in Tempe, United States, founded in 2019. It has raised $30.8M in total across 6 rounds, most recently a $1.2M Grant round in May 2025. Investors include AE Ventures, Crosscut Ventures and Zeon Ventures.
Tech & App Stack
6 technologies & apps tracked
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Funding & Exit History
Jun 2026
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Funding: Grant. Amounts, valuations, and investors where available.
Investors
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