The ZTJ from Rocket Lab is a Satellite Solar Cell that is designed for a multitude of LEO, GEO, and interplanetary missions. It has an open circuit voltage of 2.726 V and a BOL efficiency of 29.5 % at maximum power point. This space-qualified solar cell has a voltage at a maximum power of 2.41 V and is capable of delivering power of up to 4 MW. It has a cell mass of 84 mg/cm sq (300 to 600 gms) and a cell thickness of 4 - 8 µm. It is compatible with corner-mounted silicon bypass diode for individual cell reverse bias protection, weldable or solderable contacts, and mechanical strength for reduced attrition during assembly and lay down. This solar cell is fully tested to the AIAA-S111-2005 and AIAA-S112-2005 space qualification and characterization standards.