What are the different types of smart meters? A What are the different types of smart meters? There are three types of smart meters: GISM, which is a single-phase (230v) GIST, which is a three-phase (3*230/400v) GISS, which is a meter installed for heavy consumers Lorraine Gravino2018-01-22T11:10:57+01:00 FacebookTwitterRedditLinkedInWhatsAppTelegramTumblrPinterestVkXingEmail