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The solar panels on the SMM satellite provided electrical power. Here it is being captured by an astronaut using the Manned Maneuvering Unit. Solar panels on spacecraft supply power for two main uses: Power to run the sensors, active heating, cooling and telemetry.
Every watt generated by satellite solar panels serves a specific purpose in keeping these cosmic machines operational. The power distribution hierarchy prioritizes systems based on mission criticality, with some functions receiving guaranteed power while others operate only when surplus energy is available.
The International Space Station's solar arrays generate 84-120 kilowatts of power – enough to supply 55-75 average homes The reliability factor is crucial. Unlike terrestrial solar installations that can be repaired or replaced, satellite solar panels must function flawlessly for decades.
The tracking systems on satellites represent another crucial difference. Unlike fixed rooftop installations, satellite solar arrays continuously adjust their orientation to face the sun. These solar array drive assemblies (SADA) can rotate panels through 360 degrees, ensuring maximum energy capture as the spacecraft orbits Earth.
