Quality of supply
The Bundesnetzagentur publishes the supply interruption figures for electricity and gas networks.
Electricity and gas supply network operators are required under section 52 of the Energy Act (EnWG) to submit to the Bundesnetzagentur by 30 April of each year a report on supply interruptions in their networks.
Electricity networks - supply interruption figures
Electricity network operators in Germany are required to provide information on the
of interruptions in their annual reports on supply interruptions in their networks. The Bundesnetzagentur uses the information to calculate the system average interruption duration index (SAIDI). This indicates the average interruption duration per customer in one calendar year.
Planned interruptions and interruptions caused by force majeure, for instance by natural disasters, are not included. Only unplanned interruptions longer than three minutes and caused by atmospheric effects, third-party intervention, ripple effects from other networks or other disturbances within the network operator's responsibility are included in the calculations.
Gas networks - supply interruption figures
The Bundesnetzagentur again conducted a comprehensive survey of gas supply interruptions in Germany. The Bundesnetzagentur uses the information from the gas network operators to calculate the system average interruption duration index (SAIDI-Gas). This indicates the average interruption duration per customer.
Only unplanned interruptions caused by third-party intervention, ripple effects from other networks or other disturbances in the network operator's area are included in the calculations.
The comprehensive survey of supply interruptions in all gas networks in Germany in 2021 produced the following results:
|<= 100 mbar||2.16 min/a||Households and low-volume customers|
|> 100 mbar||0.02 min/a||High-volume customers|
|> 100 mbar||0.32 min/a||Downstream network operators|
|All pressure ranges||2.18 min/a||SAIDI for all customers|
The SAIDI figures for gas network operators in Germany have been calculated by the Bundesnetzagentur since 2006:
*Excluding an accident (details in German here).