**Subsidiary:** [[SolAero Technologies]] >[!summary] Features >- 31.3% Minimum Average Efficiency >- 4-junction n-on-p solar cell on germanium substrate >- Radiation hardened design with P/Po = 0.90 @ 1-MeV electron, 1E15 e/cm² fluence >- For a typical GEO Telecom Mission, Z4J+ produces 12% greater EOL power than ZTJ (1-MeV electron, 1E15e/cm² @ 55°C) >- 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+-v8.pdf]]