Power

Power refers to the electrical energy supply of the satellite and all electrically driven subsystems.
BayernSat gets its energy by means of solar cells made of gallium arsenide with the newest triple junction technology. They currently have the highest efficiency. The individual cells are parallel-connected in 5 rows of 9 cells each. This results in an open-circuit voltage of 20.43 Volts and a maximum performance of 153 Watts.
The energy is fed into the accumulator via a charging regulator. A tried and tested nickel hydrogen accumulator was chosen for the energy storage device because of its reliability and the simple monitoring of the state of charge.

So-called DC-DC converters convert the rated accumulator voltage into the bus voltages with 28 Volts, 12 Volts, 5 Volts and 3.3 Volts, which are then fed into the other subsystems.

Figure 1: Telepresence Mode Power Usage	Figure 2: Charge Mode Power Usage
Figure 3: Attitude Change Mode Power Usage	Figure 4: Sleep Mode Power Usage