SMRTR Science & EngineeringSep 10, 2026Interesting Engineering

Rocket Lab’s new space solar cell delivers 31.5% efficiency with 40% less mass

SMRTR summary

Rocket Lab launched IMM Apex, a germanium-free space solar cell with 31.5% efficiency and 40% less mass than conventional cells. It works as a drop-in replacement, eliminating costly redesigns while sidestepping China-dominated germanium supply risks, lowering launch costs, and supporting high-volume satellite production for expanding commercial space missions.

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