The invoicing model determines how the loss of electricity production is invoiced, thus significantly determining the compensation that is to be expected. The grid operator must be informed of the operator’s chosen invoicing model for the loss of electricity production by 30 June 2021. The operator is initially free to choose, but the freedom to choose will subsequently be limited. It will only be possible to change the invoicing model once per calendar year (and only from fixed rate to ex post invoicing). Exceptions only apply if there are changes in the technology or if the EIV changes.
If meteorological data exist for the plant, and if these data can be transmitted automatically, ex post invoicing should generally be chosen. This invoicing method offers the closest approximation of the actual outage levels and provides clear advantages regionally. It does, however, call for the daily transmission of meteorological data.
If a plant does not have its own weather data, data from a reference plant can be used as a basis. In such cases, the new “Spitz Light” (ex post light) model is used.
Plants without weather data will be invoiced according to the fixed rate invoicing method, which involves a continuation of the 15 minute period prior to a redispatch measure. This type of invoicing is only allowed if using the forecast model.