The article is very comprehensive, and it even reports the rare biphase that some districts in Rome have, the only reason I know it is because many solar invert

The article is very comprehensive, and it even reports the rare biphase that some districts in Rome have, the only reason I know it is because many solar inverters works with this biphase, it can cause problems with car chargers (as the article reports) but also to some gas boilers that are very common in Italy.