Available energy

The available capacity map provides an overview of the unused resource of medium voltage power lines. The map is based on calculations of medium voltage lines and shows which lines do not need costly reconstruction works in order to create a new network connection with the displayed capacity, thus helping to plan connections to more efficient locations.

How to join

In the case of an energy-intensive electricity producer and a medium-voltage consumer willing to connect, the connection fee is formed according to the actual costs necessary to build a connection with the desired capacity. In the absence of sufficient capacity, the need to carry out the reconstruction of the distribution network must be taken into account.

The connection of the applicant to the distribution network may reveal that the distribution network operator and the transmission grid operator have to agree on new conditions of consumption and/or production, which may lead to the reconstruction of the transmission grid.

To find the available capacities in the distribution network, see the map application below. To find out the exact connection fee and connection deadline an application must be submitted.

You can submit a connection application
via our e-service.
Submit a connection application

Available capacity on medium voltage lines

The interactive medium voltage line map shows the available power lines capacity in different colors. An explanatory legend opens on the top right corner of the map. Zoom in close enough to see the available capacity of the power lines on the screen.

The capacities shown are for information only. Pending and undeveloped connections are taken into account when displaying available capacities. The map does not take into account available capacities between the distribution network and the transmission grid.

Frequently Asked Questions

Elering map application

The transmission grid operator Elering also has an interactive map application for displaying available connection capacities and approximate connection costs in regional substations.

Frequently Asked Questions

The map currently only shows free production capacity that is greater than 200 kW. Lines with a free capacity of less than 200 kW, including with no free capacity, are not shown on the map. Therefore, if you want to build a production capacity of less than 200 kW, for example when installing solar panels in your home, it is necessary to submit a connection application. The purpose of the map is to provide information for building larger production capacities and directing them to optimal locations in the grid.

The calculation of free capacity is based on medium voltage lines and takes into account the constraints arising from the lines. Free capacity depends mainly on the change in voltage on the line, and after a producer connecting to the network, the voltages in the grid must remain within the permitted limits. As the voltage change along the line increases, it is possible to connect higher capacities to the beginning of the line from the supply substation and increasingly smaller ones further down the line.

The calculations take into account the current configuration of the medium voltage lines and producers that have joined so far, as well as the throughput limits of the grid with the added production. The calculations do not take into account the throughput of the transmission network or activities related to the construction of the connection point, such as the need to build a new substation to the line at the connection point.

The map of free capacities shows indicative information, and the final answer regarding the connection costs can be obtained by submitting a connection application. We process connection applications in the order in which they are received, and the information on the map does not change the order of processing.

It is also important to take into account that the information on the map is based on the current grid configuration and does take into account pending requests or pending connections, but does not take into account the throughput of the transmission network or a possible need to build a substation on the line. Therefore, in the case of an application within the available capacity on the map, it may still be necessary to contact the transmission network operator during the procedure or to rebuild the elements of the power network to allow connection.

The map shows free capacities based on medium voltage lines with the current grid configuration. The map takes into account pending applications or pending connections, but does not take account the throughput of the transmission network or a possible need to build a substation on the line at the connection point. Therefore, even with a free capacity on the map, various grid reinforcement jobs may be required for connection, including work in the transmission network.
In the case of parallel lines on the map, it is reasonable to take into account the line with lower throughput, as the final technical solution depends on various aspects and cannot be unambiguously assessed solely on the basis of the map of free capacities. It is also possible that the technical solution involves connecting to a line that is not shown on the map to ensure optimal grid configuration.
The availability of free capacity on the map provides an indication of the need to rebuild medium voltage lines, but the connection may need construction activities in the transmission network or at the connection point, which makes it impossible to estimate the time it takes to connect. The final price and duration of the completion of the connection will be revealed in the connection application.

Elering's interactive map application

Any differences between the resources shown on the Elering and Elektrilevi maps are due to the fact that Elering's map shows available capacities at 110 kV that apply to customers who are joining the transmission system and need a new network connection.

Eleketrilevi's map shows the available capacity on the low voltage side of the substation (at 6, 10, 15 or 20 kV depending on the substation) and takes into account the network contract with the transmission network, the capacity of the substation's equipment, and the network and connection contracts signed with existing customers.

If the customer connecting to the transmission network wants access to higher capacity than that displayed on the map, then the actual work volume and time cost required for connection will be determined in the process of preparing a connection offer.