A new international UPS classification by IEC 62040-3

There are three typical UPS circuit arrangements in use, called by their good old names: online UPS or double conversion UPS; line interactive UPS; and offline UPS or passive standby UPS, but these are not explicit. Competition is good in general, but in the case of UPS designations some competitors are extremely creative. Terms like "quasi online UPS", "semi online UPS", true online UPS and "online-sharing technology" are today common. The motivation of these UPS providers are to confuse the user to believing their products are true double conversion at a much more affordable price. In reality, these products are not double conversion, and do not provide the reliability that users expect in receiving double conversion.