The paper investigates the performance analysis of PV fed single phase Z-source inverter connected to Grid. The PV systems are interfaced to the grid invariably by a power electronic inverter. Many of the important characteristics of the PV generation are influenced by the design and performance of the inverter. Hence suitable models of the inverter are needed to analyse the PV systems. The Z source inverter has an ability to perform DC to AC conversion and buck boost operation in single stages. The paper presents an impedance-source (or impedance-fed) power converter (abbreviated as Z-source converter) and the results and relative merits are also discussed