Unfortunately, there is no hard and fast answer to this question as each 2-rate meter is configured slightly differently, depending on the manufacture and region of the country you're in. The most common Economy 7 meter's Night register records during the 7-hour period between 00:30am and 7:30am. The Day register operates for the remainder of the time (7:30am - 00:30am) as indicated on the graph below.
To see whether you have an Economy 7 meter see our Guide: Economy 7 meters. If you do and would like to know which hours your particular meter operates then you would need to get in touch by emailing us firstname.lastname@example.org.
Just as with Economy 7 meters there are many different types of Economy 10 meters, the main difference between these meters and Economy 7 meters is the duration of the Off-Peak or Night hours. As an Economy 7 meter records for 7 hours, an Economy 10 records for 10 hours. The most common Economy 10 meter's Night register records during the 10-hour period between 10:00pm and 8:00am. The Day register operates for the remainder of the time (8:00am - 10:00pm).
To add another layer of complexity, some 2-rate meters are 'tele-switches' i.e. each register's operating hours (Day/Night) vary and are controlled remotely by the local distribution network, meanings that the off-peak hours can change.For more information please see: