According to the standard terms and conditions for connecting to Elering’s electricity transmission system (hereinafter referred to as the connection conditions), all procedures related to connecting to the transmission system, preliminary feasibility study for connection, and the accompanying data exchange are carried out in the information system for connections egle.ee, in which data on the requested connection and necessary appendices must be submitted.

When submitting a connection application, it must be taken into account that the documents to be submitted should include both the generating unit and the installations related to the generating unit as well as the power lines and substations between the connection point and the generating unit.

If the technical parameters of the generating unit change at a later stage, both the technical solution for connection and the related connection fee may change accordingly.

To receive a connection offer, the client is required to pay the processing fee.

Elering will inform the client of deficiencies in the connection application within five days from the payment of the processing fee. The client has 20 working days from the submission of Elering’s notice to remedy the deficiencies in the connection application.

The connection offer is made to the client within 90 days from the acceptance of a proper connection application. The offer is valid for 60 days, during which a connection contract must be entered into.

NB! According to § 21 (6) of the Grid code on the Functioning of the Electricity System, if the connection agreement terminates before its completion for reasons attributable to the client, except in the case specified in paragraph 7 (the cost of the construction procurement of the cost-based component is more than 2 times more expensive than the cost of the construction procurement originally estimated in the connection agreement), the connection fees will not be refunded to the client.

The connection contract includes:

  • locations of the connection and metering point;
  • estimated amount of the connection fee and the fee for amendment of the connection conditions and the terms and conditions of payment thereof as well as the calculation thereof;
  • technical solution for connection with the basic electrical parameters of the connection point;
  • conditions for ensuring grid connection;
  • amendment of consumption and/or generation conditions;
  • terms and conditions of amendment and termination of the connection contract;
  • terms and conditions of the general part of the connection contract;
  • deadline for completion of the connection;
  • other terms and conditions.

The connection contract is entered into once Elering receives an acceptance of the offer at the latest on the last day of validity of the offer of a connection contract and provided that the client has submitted to Elering all the required data and documents together with the connection application. The singing of the connection contract is considered an acceptance of the offer of a connection contract.

When performing network calculations following the connection applications received from 1 May 2022 onwards, Elering uses a calculation methodology that does not require an additional increase in the transmission capacity of the electricity network when connecting generating and/or consumption-oriented capacities of connection contracts entered into in the same substation at the same voltage to a common connection point. All work to increase the transmission capacity of connection contracts to be merged will remain in force, but the need to establish multiple connection points will cease. If you are interested, please contact the project manager in charge of your connection contract.

Appendices to be submitted upon connection

Appendices to be submitted upon generation-oriented connection

To connect a production unit or mixed installation, or to amend their generation and/or consumption conditions, the following must be appended to the application:

  • A decision to initiate or adopt a spatial plan enabling the construction of the electrical installation to be connected to the network;
  • To connect a production facility to the network in a public water body, the market participant shall submit to the network operator, together with the connection application, either a building permit pursuant to § 113¹ (1) of the Building Code or, in the case of an offshore wind farm, a decision recognising the environmental impact assessment report as compliant with the requirements pursuant to § 113¹ (2);
  • Documents confirming that the market participant wishing to connect to the network has a legal basis to use the property or building for which the grid connection is requested;
  • Location plan indicating the existing or requested location of the electrical installation and connection point, along with coordinates;
  • A payment order for the security deposit or a letter of guarantee;
  • Other important appendices to be appended to the application which the applicant considers necessary to submit.
Appendices to be submitted upon consumption-oriented connection

Upon connection of a consumer or a distribution system operator at a new connection point or the amendment of consumption and/or generation conditions at an existing connection point, the following must be appended to the connection application:

  • Location plan indicating the existing or requested location of the electrical installation and connection point, along with coordinates;
  • Description of the start-up and shut-down process of the electrical installation and description of the predicted operation, indicating all important factors affecting operation (if the power of a current-using equipment of an individual consumer to be connected to the electricity network exceeds 10 MW);
  • A list of generation modules to be connected under the distribution network connection application, as well as those already connected;
  • A payment order for the security deposit or a letter of guarantee;
  • Other important appendices to be appended to the application which the applicant considers necessary to submit.

If the data required in the connection application have been previously submitted by the client to the transmission system operator and there have been no changes thereto, the client may choose to not submit the required materials and instead refer to the previous application or letter in which the required data have been submitted.