If you are writing a thesis you should already know that the first time you use an acronym you should show it in full; eg
MPPT or Maximum Power Point Tracking is ...
The single-ended primary-inductor converter (SEPIC)
You have not said what FREQUENCY the SEPIC is using; that will affect the values you need to filter out noise introduced by the SEPIC which is changing the load on the solar panel - and hence its voltage; and also the voltage produced at the output.
- Like the buck–boost converter, the SEPIC has a pulsating output current. The similar Ćuk converter does not have this disadvantage, but it can only have negative output polarity, unless the isolated Ćuk converter is used.
- Since the SEPIC converter transfers all its energy via the series capacitor, a capacitor with high capacitance and current handling capability is required.
- The fourth-order nature of the converter also makes the SEPIC converter difficult to control, making it only suitable for very slow varying applications.