Gabriel Investment Syndicate and Scottish Enterprise backed the Edinburgh space firm to accelerate research and design.
"We are in the midst of the second space race with rocket developers on the cusp of launching from UK soil, with the number of launches across the globe growing exponentially."
The capital will support international expansion and recruitment as demand grows for the company grid stability technology.
"As we deliver more projects to support the global transition to Net Zero, this backing will empower us to deliver at scale, expand our commercial presence internationally, innovate further, and make a real contribution to a clean energy future."
Soulmates Ventures and Deeptech Seed Fund co-led the seed round, which includes £500k from Innovate UK.
"I couldn't be more excited and proud about this next stage in our growth. It is a landmark opportunity, a once in a lifetime moment, to build a transformative product."