Metering data from the Trading Operations Report


The page below details highlighted Metering system data from the previous month. This data is acquired from BSC Agents and inputted to the Trading Operation Monitoring Analysis System (TOMAS) database.

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Metering Systems in the markets

The charts below show the rolling annual change in Half Hourly (HH) and Non-Half Hourly (NHH) Metering Point Administration Numbers (MPANs).

Generally there is an MPAN assigned for each separate metered supply to premises settled through SVA. The chart therefore provides a high level overview of the growth (or otherwise) in the Half-Hourly and Non-Half Hourly SVA markets.

The data on these charts is taken from the Initial Settlement run (SF run) only, such as the count of MPANs in that SF run in respect of that Settlement Date.

Peaks and troughs in the data may indicate metering systems moving between HH and NHH Settlement or other issues that need to be investigated.

Number of Metering Systems in the Non-Half Hourly Markets

Number of Metering Systems in the Half Hourly Markets


There are no major highlights.

Microgeneration: Metering Systems and Energy Exported

The chart below shows the number of MPANs associated with microgeneration schemes registered in SVA settlements and the energy in MWh exported by these schemes into the NHH Market.

The data is summed from the number of MPANs associated with Consumption Component Classes 32 and 33 (metered NHH Active Export) and the daily total energy that those MPANs export to the system (Actual (33) and Estimates (32)).

The up and down nature of the settled energy reflects the weekday/weekend pattern of Profile Class 8 and the monthly step changes in the energy volumes reflect changes in the assumed times at which the equipment is exporting.


The Smart Export Guarantee (SEG) was launched in January 2020. The take up of the government-backed initiative may have caused increases in microgeneration showing in Spring 2021.


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