[[Home|🏠]] <span style="color: LightSlateGray">></span> [[Hardware#🌞 Solar Solutions|Hardware]] <span style="color: LightSlateGray">></span> Z4J Solar Cell ## Summary - 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]]