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The connection capacity calculation app e-Gridmap:

  • shows the approximate connection capacities in substations that can be used without increasing transmission lines’ service capacities 
  • calculates the estimated costs of additional investments for accommodating the desired connection capacity at a given substation

The results are set out when connecting to one substation and do not take into account a situation where connection capacity is desired simultaneously at different substations. In the 110 kV grid, the limit for calculations of connection capacity is 100 MvA; and in the 330 kV grid, it is 300 MvA. The calculations shown by e-Gridmap apply to cases where a new grid connection must be established for connecting to the grid.

The e-Gridmap data are updated once a quarter or more often, and the date of the last update can be seen in map view. For questions related to e-Gridmap, contact

For more detailed information, such as the amount of connection fee, the expected time for completion of the connection and other technical requirements, the prospective customer must submit a pre-feasibility study application to Elering via the connection information system,

READ MORE: e-Gridmap launched by Elering allows immediate calculation of connection cost.

Map on full screen