Rocket Lab has introduced advanced silicon solar arrays intended to support gigawatt-scale space-based data centers spanning kilometers in orbit. The company positions the product as a response to rising AI and compute demand and frames on-orbit solar generation as the key scaling constraint for “data centers on orbit,” where “power is the gating factor,” according to the announcement.
Rocket Lab says its silicon approach targets low cost per watt at industrial scale using “mass-manufacturable, lightweight, and modular systems” that can scale economically as orbital compute demand rises. The press release also argues that orbit offers advantages for data center infrastructure versus terrestrial sites, citing constraints around power, land, and water for cooling on Earth, and noting on-orbit access to “abundant space,” a “cold space environment,” and solar energy.
As background, Rocket Lab explains that satellite solar cells have typically used gallium arsenide and germanium for radiation tolerance, and it describes both as critical minerals with supply constraints influenced by “evolving geopolitical challenges.” Rocket Lab notes it already has “the world’s largest installed production capacity for gallium arsenide and germanium based solar arrays,” and says it has now added “space-qualified silicon” solar arrays to reduce reliance on critical mineral supply chains. For production scope and integration, Rocket Lab says the silicon arrays are “designed for constellation scale production,” with “radiation hardened solar cell modules” that are “flexible and lightweight,” supporting multiple stowage and deployment methods. The company also describes itself as “the world’s only fully vertically integrated space power supplier,” offering solar cells, assemblies, modules, substrates, complete panels, and “entire solar array wings” under one roof.
Rocket Lab also says it has developed a hybrid array option combining “high efficiency and silicon solar cells.” It positions high-efficiency cells for missions where “size, weight, power or performance are at a premium,” silicon cells for “cost, schedule or constellation scale,” and hybrid arrays where those factors must be traded off to deliver “optimum performance at a compelling value.”
The announcement ties the move to Rocket Lab’s semiconductor manufacturing expansion supported by the US CHIPS and Science Act. Rocket Lab points to an October 2025 announcement of a $23.9 million CHIPS award to expand semiconductor production capabilities in Albuquerque, New Mexico.
Source: Rocket Lab
