Modeling and research of photovoltaic system with microinverter

The article presents modeling of a grid-connected photovoltaic system with microinverter. The system consists of PV panel, a single-phase inverter connected to the grid and data logger. A mathematical model for calculating the power of a photovoltaic system using meteorological data has been developed. The inverter efficiency characteristics are represented in dependance of input DC power and fitted with appropriate mathematical function. The obtained simulation results of the photovoltaic systems are validated with experimental data. Real characteristics for the production of energy from PV system are also shown.