You are invited to participate in a two days of intensive training by means of selected lectures and experimental work on different aspects of impedance spectroscopy. The course will introduce the basic concepts and the whole experimental process: from the design of experiments, set-up requirements, to data analysis, with special attention to computer-controlled instrumentation and use of software packages for data fitting and visualization. Specific applications to different energy technologies will be covered including perovskite solar cells, LED, photoelectrochemical fuel production, etc.