In the system as shown in fig 2, two different topologies
can be implemented:
A. Without DC to DC converter: This block is
required when the output voltage of PV panel is
high enough and can be directly fed to inverter. It
decreases the cost of drive but it requires large
size of PV panel so the cost of overall system is
tradeoff between cost of PV panel and boost
converter. This topology is more useful at
commercial sites where large size PV panels are
already installed.