The ambitious plan exhibited in this paper is to develop a single-phase DC/AC grid-integrated, transformerless and cost-effective inverter for solar Photovoltaic (PV) systems. The costly combination of the two converters specifically DC/DC and DC/AC had inspired the development of this new financially cost effective inverter. This novel solitary stage converter has the capability to operate on both buck mode and buck-boost mode to harvest maximum power from two distinctive PV panels with the help of PI and hysteresis controller. The working principle and configuration of the proposed system are verified under equally, as well as incompatible climatological conditions and hence the system can endure a extensive deviation of voltage in both the PV panels. This inverter requires just four switches and is also free from the shoot-through problem. Owing to noticeable features such as dual MPP tracking, omission of transformer, exclusion of diodes, reduced switch count, negligible losses and wide operating voltage, these PV grid-tie inverters continue to work even during periods of partial shading due to clouds or dust. In addition, the viability of the inverter has been validated both by detailed simulation and exhaustive experimental studies on a 230V/50Hz/2000W research centre model.