Rocket Lab introduces high-efficiency dolar cell to reduce reliance on supply-constrained critical minerals
Rocket Lab Corporation has announced the production release of Inverted Metamorphic (IMM) Apex, the latest iteration of its next-generation solar cell designed to deliver exceptional efficiency and reliability for space applications. IMM Apex boasts a Beginning of Life solar conversion efficiency of 31.5% and 40% lower cell mass, giving it best-in-class specific power (watts per kilogram) while maintaining excellent radiation hardness and performance over temperature.
IMM Apex is free of the germanium substrates used for conventional, multi-junction solar cells produced for the last three decades. By eliminating reliance on this critical mineral, IMM Apex mitigates rising costs and supply chain constraints currently facing the space power industry.
Crucially, IMM Apex is a mechanical and electrical drop-in replacement for heritage solar cell products on germanium, meaning customers can integrate it into existing systems without major investments to re-tool for new cell technology.
IMM Apex builds on the proven success of Rocket Lab’s IMM cell technology, which powered NASA’s Ingenuity Mars Helicopter during its historic mission and has been powering satellites on orbit for more than a decade.
In addition to being free from germanium supply constraints, optimized manufacturing processes and targeted capital investments have enabled efficient manufacturing in multi-100-kilowatt volumes to meet growing demand.
“Rocket Lab is excited to bring this cutting-edge solar solution to market. IMM Apex delivers exceptional performance while addressing real-world challenges like rising material costs and supply chain constraints,” said Brad Clevenger, President of Rocket Lab USA. “With IMM Apex, customers gain access to a high-efficiency, lightweight, germanium-free product that combines proven reliability with faster production times. IMM Apex is designed to more cost-effectively power the most ambitious missions without compromising performance.”
IMM technology has undergone more than a decade of rigorous testing and qualification, ensuring its readiness for a wide range of customer needs and mission requirements. IMM Apex is available now, with ongoing advancements to support future applications.
IMM Apex adds to Rocket Lab’s long history of delivering reliable, high-efficiency solar solutions for critical missions. The company has provided space-grade solar technology to critical civil, national security and commercial space programs including the James Webb Space Telescope, NASA’s Artemis lunar explorations, and other interplanetary science missions. More than 1,100 satellites on orbit are powered by Rocket Lab solar products.
