**Subsidiary:** [[SolAero Technologies]] >[!summary] Features >- 30.0% Minimum Average Efficiency >- 4-junction n-on-p solar cell on germanium substrate >- Superior radiation hardness and temperature performance compared to other Germanium based solar cells >- 30.0% Minimum Average Efficiency for a typical GEO Telecom Mission, Z4J produces ~7% greater EOL power than ZTJ >- Fully qualified to the AIAA-S111-2014 Qualification and Characterization Standard. https://www.rocketlabusa.com/space-systems/solar/space-solar-cellscics/ ![[RL-SolAero-Data-Sheet-Z4J.pdf]]