China’s prototype rollable solar wing heads to orbit

A satellite solar wing is being rolled up like a yoga mat in a Chinese workshop. Yanhe Tech has completed Xingyun, a prototype made with perovskite solar material, and is sending it toward in-orbit testing. During launch, the panel compresses into a reel roughly the diameter of a thermos flask, then is designed to deploy from the satellite’s side in space.

The change is mechanical as much as chemical. Traditional satellite wings use rigid panels that fold through several steps, adding weight and consuming storage space inside the rocket. Xingyun uses a super-elastic memory composite that rolls into a cylinder; a passive drive mechanism then unspools the panel in a single smooth motion.

Yanhe Tech claims the design weighs 25 to 30 percent less than conventional foldable solar wings. It also reports a 35 to 1 storage ratio, meaning the deployed panel spans 35 times its stowed volume. The company says one wing can power micro-satellites and CubeSats, while arrays could serve communications constellations, remote-sensing satellites, and deep-space payloads.

So what changes, concretely? A smaller, lighter power system could leave more launch capacity and room for satellite equipment, especially on missions stacking many small spacecraft into one rocket. That benefit remains conditional: Xingyun is still a prototype.

The main obstacle is endurance. Yanhe Tech founder and CEO Feng Fan says orbital perovskite cells currently have an expected lifespan of only six months and remain in an early verification stage. Radiation and extreme temperature swings in low-Earth orbit degrade them faster than traditional silicon cells. The company is using high-throughput AI methods to refine the material’s chemical formulation, while targeting a broader three-tier space-power network for 2030.