Comparison between existing transformer-less PV inverter topologies

In recent years, the interest in installing more photovoltaic systems to generate electricity power has rapidly increased. A number of reasons such as environmental concerns, electricity business restructuring, the fast developments of small-scale power generation technologies and micro-grid related systems can explain this trend. In order to improve the efficiency and reduce the cost of a photovoltaic system, many people are interested in PV inverter perfection, and this is due to the importance of this part in PV systems, it is the interface between produced and used electricity. In this paper we will focus on PV inverters, we will review available transformer-less PV inverters topologies and those topologies will be classified on the basis of applicability for photovoltaic uses.