Practical guide


Standard metering services relate to metering data provided by Elia on its own initiative and free of charge to balancing responsible parties, access holders and energy suppliers and, on request, to grid users.

In practice, all applicants receive the aggregated quarter-hourly data per access point in the form of daily and monthly load curves. These data allow them to invoice for their services and check their invoices.


Metering and measurement services that are not part of the standard metering services are referred to as additional, or commercial, metering services.

As such, these services are offered by Elia on the basis of a tariff paid by the applicant. These services are either not foreseen in the grid codes or the grid codes stipulate that these services must be paid for by applicants.

For most services, prices are set based on the number of time series. A time series corresponds to a unique piece of digital data that varies as a function of time. This piece of data will typically be:

  1. The quarter-hourly integration of a physical energy measurement acquired directly by existing Elia equipment (active or reactive energy).
  2. An aggregation of these integrated measurements. The terms of the aggregation are then selected by the applicant from among the physically available measurements.
  3. Telemetering and/or remote signalling.

A contract for the provision of services is concluded between the applicant and Elia to organize the provision of these services.

Under the rules on confidentiality and non-discrimination applied by Elia, only the applicant for services has access to this information, after obtaining the authorisation of the data owner if necessary.

Here is an outline of the various services on offer:

Daily and/or monthly provision of load curves, either aggregated or per metering point

The load curves are based on quarter-hourly data. They can be grouped (aggregated) by access point, by delivery point and so on, or based on equations set by the applicant, before they are made available.

All the data are brought together in a monthly file. Each day, the monthly file is updated with non-validated quarter-hourly values from the previous day. As time goes on, these quarter-hourly values are validated by Elia and the validated values replace the initial non-validated quarter-hourly values.

For more details about this product, see product sheet M1 (PDF, in French).

Provision of near-real-time metering data

Elia makes near-real-time metering data available to inform customers of their level of consumption and/or generation at one or more points on the grid.

As in the case of the load curves, the data are published on the Elia website. However, there is one significant difference in that they are available just a few minutes after the end of the quarter-hour in question.

If no near-real-time data are available, remote measurements will be used. However, this information is slightly less accurate than that for the load curves.

For more details about this product, see product sheet M4 (PDF).

Provision of metering impulses

Metering impulses are electrical signals transmitted by the meters to the applicant for the service via a conductor or a remote transmission system. Each signal is the equivalent of one unit of active or reactive energy. These impulses enable grid users to access their gross consumption and generation data in real time.

For more details about this product, see product sheet M2 (PDF).

Provision of telemetering and remote signals in real time

Elia makes its remote measurements and/or signals available using transmission channels between its SCADA system and that of the customer via the Tase2 (ICCP) protocol.

This provides the customer with real-time remote measurements and/or signals which Elia's control centre uses to manage the transmission system.

Installation and management of meters

Grid users can ask Elia to install meters in their facilities to provide an appropriate response to some of their specific needs (internal invoicing, control of consumption, acquisition of green certificates, etc.).

At the request of grid users, Elia can also assume responsibility for the management of these meters (monitoring accuracy of the meter, first to take action in the event of meter failure).

For more details about this product, see product sheet M3 (PDF).