Spacecraft have multiple solar panels
Not all spacecraft have multiple solar panels. The number of solar panels a spacecraft has depends on the mission and the power requirements of the spacecraft. Some spacecraft, such as the International Space Station, have large arrays of solar panels to provide power for the station’s systems and experiments. Other spacecraft, such as deep space probes, may have only a few solar panels or none at all, and instead rely on other power sources such as nuclear generators.
The use of solar panels on spacecraft allows for a reliable and long-lasting power source, as they can convert the energy from the sun into electrical power. This eliminates the need for carrying heavy batteries or other power sources that would need to be replaced or refueled. Additionally, the use of solar panels allows for the spacecraft to operate independently of other power sources or support systems.
Solar panels on spacecraft come in different sizes and designs, depending on the requirements of the mission. Some are made with traditional silicon cells, while others use newer technologies such as multi-junction cells or thin-film cells. The efficiency of solar panels also varies, with some designs able to convert more than 30% of the energy they receive into electrical power.
However, while Solar panels are very useful in providing continuous power source but they have some limitations, one of them is that the output power from solar panels drops as the spacecraft moves further from the sun, which can be a problem for missions to the outer solar system. In this case, some spacecraft are equipped with radioisotope thermoelectric generators (RTGs), which use heat from the decay of radioactive materials to generate electricity, as an alternative source of power.
Overall, the use of solar panels on spacecraft is an important technology that allows for long-duration missions and exploration of the solar system.