Competency Investigation of PV Inverters In Palestine

Abstract

Photovoltaic inverter, that is the heart of PV systems, which is take (20 – 25)% total cost of PV system which is in charge of electric power conversion from DC to AC. Due to the multiplicity types of inverters, which have the same power class and type connection to grid but with gap in their prices. This gap has raised attention work compared based on several parameters. The project focuses on competency investigation of PV inverters are used in Palestinian houses that have the same power class with prices gap, based on the technical specifications, internal installation evaluation, protection, monitoring, costs and periodic tests under the same condition and circumstances to try to justify this difference in prices and provide scientific comparison study between these inverters. The study would provide a scientific base for professional and unprofessiona interested people to simplify their purchase decision in the manner of reliability/cost relationship. For this purpose, a studying for Palestinian market is required to give most commonly types of inverters used in Palestinian houses. Whereas by statistical analysis of questionnaire, German and Chinese on grid inverters are the most com types. As a result, each inverter has different specifications (weakness and strengthen). However, the points on which the comparison was based are insufficient to determ the best of them.