Half Hourly Meters or “00” electricity meters have a peak load above 100kW and are equipped with a ‘half hourly’ primary meter. These commercial electricity meters cover all sites that have a large commercial supply of electricity, and the electricity meter is read every 30 minutes of the day, hence the name half hourly meter. This means that total consumption is recorded every half hour, and this information is automatically retrieved from the meter and passed directly to the energy supplier ensuring your energy bills are accurate.

If you are a large customer you must have a contract based on readings taken each half hour period during the day. These are known as half-hourly metered contracts and the price of electricity will vary depending in part of the national demand for power at particular times in the day. Large customers must have appropriate metering (Code 5 or above) which are operated and maintained by an approved meter operator (MOP). The data from these meters must also be collected by an approved data collector (DC). A full list of approved meter operators and data collectors is available from the industry regulator, Ofgem.