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Apart from this, there are several factors like the intensity of radiation, solar cell technology, etc which will affect the power generation. Note that throughout the orbit, uniform power generation may not be assured. Hence, there are is an additional function which needs to be achieved:
*To supply power to power regulation block if power from solar panels is insufficient
This power cannot be generated out of nothing. One way to arrange for this is to store power when it is available in excess and release this power when solar power is insufficient. One of the ways to achieve this is by use of a [[battery]]. Typically, a dedicated circuitry is needed to handle the charging and discharging of the battery. This is represented as the “power storage management” in this updated schematic.<br/><br/>
[[File:Diag2.png|center|600px]]
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The discussion on this example is paused at this point to share some insights on the process followed. While discussing this example, a schematic was created, keeping in mind only the power aspect. The subsystem was broken down to blocks. Concepts required to realise these blocks were understood in detail and requirements were further defined for these blocks. In the process, an updated schematic was also created. Such schematics can be developed for other subsystems as well. Each schematic is designed keeping in mind one or more perspectives, like the flow of power, the flow of data, based on mechanical interfaces etc. These schematics or representations are called system architecture. There could be more than one system architecture which meets the requirements. These alternatives are to be evaluated by further system analysis. <br/> <br/>
Let’s evaluate the starting point for the example as well. The requirement that 1A at 5V is to be supplied to the system is an estimate which is to be arrived at before all the components of the system have been finalized.<br/> <br/>