Changes

It is typical to single a single '''PDS''' in smaller satellites. In larger satellites it is not uncommon to have multiple distribution systems for collections of components. Typically a distribution bus will contain rails of 5v, and 3.3v for Cubesats. For special applications and different desired rail voltages, a modified EPS may be required. This is the critical module that handles voltage protection, isolation, and fault detection within the power block.

It is typical to single a single '''PDS''' in smaller satellites. In larger satellites it is not uncommon to have multiple distribution systems for collections of components. Typically a distribution bus will contain rails of 5v, and 3.3v for Cubesats. For special applications and different desired rail voltages, a modified EPS may be required. This is the critical module that handles voltage protection, isolation, and fault detection within the power block.

The PDS also typically contains the '''Peak Power Tracking, PPT''' module. The PPT monitors the solar panels and places the appropriate load resistance across the solar panel terminals in order to draw the maximum amount of power from them. Solar panels have a non-linear IV curve, which means their output power changes across loads and voltages. As the sunlight changes the voltage, the PPT adjusts the load to match.   

The PDS also typically contains the '''Peak Power Tracking, PPT''' module. The PPT monitors the solar panels and places the appropriate load resistance across the solar panel terminals in order to draw the maximum amount of power from them. Solar panels have a non-linear IV curve, which means their power output changes across loads and voltages. As the sunlight changes the voltage, the PPT adjusts the load to match.