At the TSO level, available hosting capacities in Estonia are published via a map, which shows grid connection prices for generation units based on their production capacity. There is no option for capacity unavailability, as Elering has moved to fixed prices and grid pre-development. If, by the time a generation unit is ready to inject power into the grid, the grid itself is not ready, the production will be curtailed, and the client will be compensated for the curtailment. 

At distribution level, Elektrilevi is the largest DSO, serving about 95% of the distribution grid. Two other DSOs – Viru Elektrivõrgud and Imatra Elekter AS – service about 4% of distribution grid.

Elektrilevi is the only DSO that has a capacity map for open use. It is important to note that the map has quite a few restrictions. The map only shows the free capacity of MV lines for producers. The calculation does not consider substation limitations and TSO connection point limitations. In addition, it is limited to specific grid parts in the map, as information is not available for all lines. There are no planned developments for the map, though this may be possible at a later stage. Currently, the free hosting capacity (in the map) is calculated using voltage levels.

Flexibility is a topic actively under development, though it remains at an early stage. Currently, information on fixed capacity is available, but the flexibility needs assessment will provide a more complete picture on flexibility. 

In LV, clients can connect to grid by ampere-based price (up to 63 A). In MV and some other exceptions, the connection fee is cost-based. If a grid reinforcement is not planned in the network development plan, then the client must pay for it.