TerraSpark closes multi-million euro round for space-based solar
Luxembourg-based startup TerraSpark has raised more than €5 million to advance a bold plan: capturing solar energy in space and transmitting it wirelessly to Earth. The fresh capital will support technology development, early demonstrators and key hires as the company positions itself at the frontier of space-based solar power.
Aiming to turn orbit into a clean power plant
TerraSpark is developing orbital platforms equipped with high-efficiency solar panels designed to operate above the atmosphere, where sunlight is constant and more intense. Instead of storing this energy onboard, the company plans to convert it into microwave or laser-based beams and transmit it to Earth, where ground receivers would feed it into local power grids.
The approach, long discussed in academic circles, promises a potentially continuous, weather-independent source of renewable energy. The new funding will allow TerraSpark to validate its core wireless power transmission technology and explore regulatory pathways for safe operation in both space and terrestrial environments.
Luxembourg’s growing role in the space economy
Luxembourg has emerged as a European hub for the space economy, hosting a growing cluster of companies focused on satellites, space resources and orbital infrastructure. TerraSpark taps into this ecosystem, leveraging national support schemes and access to specialized engineering talent.
The over €5 million round, backed by a mix of early-stage investors and sector-focused funds, will help the startup move from concept studies to hardware prototypes. The company plans a series of lab and field tests to demonstrate safe, efficient transmission over increasing distances before targeting in-orbit demonstrations.
Technical and regulatory hurdles ahead
While the vision is ambitious, TerraSpark faces significant challenges. The team must prove that high-power wireless energy transfer can be achieved with acceptable efficiency, cost and safety. International coordination will be required to secure access to suitable frequency bands, orbital slots and environmental approvals.
If successful, the technology could complement terrestrial solar and wind farms by providing dispatchable, low-carbon power to regions with limited land or variable weather. The new funding marks an early but important step toward testing whether space can become a practical extension of the world’s clean energy infrastructure.