ABOUT ROLL-OUT SOLAR ARRAYS (ROSA)
The Roll-Out Solar Array is a next-generation flexible solar panel that rolls out like a tape measure rather than folding like an accordion. Developed by Deployable Space Systems, ROSA panels are being installed on the ISS to augment aging original arrays. The design is also baselined for Gateway and commercial satellites.
SPECIFICATIONS
| Category | Power |
| Subcategory | Solar Array |
| Manufacturer | Deployable Space Systems (Redwire) |
| Mass | 340 kg |
| Power | 20,000 W |
| Dimensions | 19 m x 6 m per wing |
| Redundancy | 6 iROSA wings planned for ISS |
| Standard | ISS EPS augmentation |
| Status | Active |
| First Use | June 20, 2021 |
OPERATING PRINCIPLE
Flexible solar cells on composite slit-tube booms that strain-energy deploy by unrolling; lighter and more compact than rigid-panel arrays
KEY SPECIFICATIONS
| cell_type | XTJ Prime triple-junction |
| mass_saving_pct | 20-30 vs rigid |
| stowed_volume | Compact roll |
| efficiency_pct | 32 |
MASS CONVERSIONS
| Kilograms | 340.0 kg |
| Pounds | 749.6 lbs |
VEHICLES USING ROLL-OUT SOLAR ARRAYS (ROSA) (3)