A great number of research works have been devoted to both the advances in electronic power converters and renewable energy sources, either connected to the grid or isolated. The combination of these two important research subjects is quite important, as the urgency of facing the challenge of replacing fossil energy with renewable energy becomes paramount. There has been a growing and an unprecedented number of technical problems and challenges in the last few years stemming from this pursuit.The purpose of this study is to highlight approaches for predicting electronic power converters’ future behavior and estimating their remaining useful life (RUL) to define an effective maintenance schedule.