Since it began its rise to ubiquitous commodity back in the last part of the 19th century, electrical energy has played an essential role in the development of our modern society. It has fostered industrial changes, given birth to countless new products and services, and basically reshaped our culture. Simply put, it's impossible to conceive our lives without it. That's why so many researchers and experts are trying to look for new ways to optimize its generation and consumption. Today, we are still using contaminating power stations, we have lots of bad habits that make us waste energy, and then there's climate change, which is putting pressure on our energy demand.