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Enduring Connection Policy (ECP)

What is the ECP?

The ECP process for grid connection applications is the current pathway for generators, storage, and other system services technology projects to connect to the electricity system. On 25th September 2024, the Commission of Regulation for Utilities (CRU) published its decision on Electricity Connection Policy – Generation and System Services (ECP-GSS) which sets policy for onshore renewable and conventional generators, storage, and other system services technology projects connecting to the electricity system. The System Operators are working with CRU on the actions outlined in this decision paper. For further information, please refer to the Electricity Connection Policy – Generation and System Services Decision Paper (CRU/2024101).

The ECP-2.5 application window for all Category A (batch) applicants closed on 30th November 2024. Successful applicants were prioritised by largest renewable energy generation (first 25), then by planning permission grant date with no more than 10 primarily storage and other system service technology projects. Please see the ECP-2.5 Category A initial Batch Results here and the initial ECP-2.5 Category B and C Batches here.

Further to the above, on the 20th March 2025, the CRU has published a Decision Paper (CRU202546) on Enduring Connection Policy – 2.5.1 (ECP-2.5.1). The CRU has decided to open an ECP-2.5.1 batch window to provide an additional opportunity for connection applications. Successful ECP-2.5.1 applicants will be processed together with successful ECP-2.5 applicants. ECP-2.5.1 will be open from the date of publication of this Decision Paper (20 March 2025) and will close at 5pm on 10 April 2025.

For further information, please refer to the ECP-2 Decision Paper (CRU/20/060), ECP-2 Ruleset and ECP-2.4 decision (CRU202326).

 

ECP-2.5 application categorisation

Under ECP-2.5, grid connection applications are categorised as follows:

CategoryDefinitionOffer targetPrioritisation
AGeneration, storage, and other system services technology projects (MEC>0.5MW)70First 25 on largest renewable energy generators; remainder on earliest planning permission grant date; no more than 10 storage (where 100% of the MEC is storage) and other system service technology projects
BSmall projects (MEC>0.2MW and ≤0.5MW), DS3 system services trial projects (MEC≤0.5MW) and Autoproducers15Earliest application received complete date
C100% community-owned renewable energy projects (MEC≥0.5MW and ≤5MW)15Planning permission grant date and then by application form received complete date

Application information and tools

Useful information and digital tools to guide you through the ECP-2 process.

Renewable hubs pilot

ESB Networks received CRU approval to begin a Renewable Hubs pilot at 5 locations as part of the ECP-2.4 application process, which includes per-MVA charging for shared assets, supporting the accelerating connection of renewables to the electricity system

Generator standard charges

The CRU published a decision paper (CRU/21/035) on ESB Networks 2020 proposals for changes to Generator Standard Charges (GSCs). The new 2025 ESB Networks "Standard Prices for Generator Connections 2025" document is published here.

Generation minimum cost calculator

Our interactive available capacity heatmap contains capacity information on our 3-phase LV, MV and HV DSO substations, to enable easy identification of potential transformer capacity in the vicinity of your site.

Generator availability capacity map

The generation minimum cost calculator provides an estimation of the minimum costs associated with generator connections to the Distribution System Operator (DSO) network >200kW.

Installed capacity cap review

On the 17th January 2024, the Commission for Regulation of Utilities (CRU) published a Decision Paper on the Installed Capacity Cap (ICC). Please see summary to the CRU decision.

Node assignment ruleset

The node assignment ruleset aims to establish an efficient screening process for allocating ECP-2 applications to the appropriate nodes at which the generation can connect to the Irish electricity grid.

Application guide

Step 1 - Acquire an Ordnance Survey Map, Site Plan and Single Line Diagram

Obtain a 1:50,000 'Discovery Series' Ordnance Survey map with both the location of your new generator and the site boundary clearly marked with a red pen.


You will also need a detailed site plan, in the appropriate scale, of the proposed facility, indicating the site boundary, the proposed location of the connection point, generators, transformers, site buildings etc.


A draft electrical single line diagram of the proposed facility detailing all significant items of plant and their values including Relevant Voltage Levels, Interlocking, Earthing and Synchronising Arrangements, Relay Types, CT/VT ratios, Generator Transformer(s), Power Factor Correction, Location of Alternative Connections (e.g. house load) and Network Connecting Transformer(s) (if applicable).

Step 2 - Complete an Application Form

To apply, please complete the appropriate generator application form:

 

New Generator Connection Application (NC5) (PDF | 1.2 MB)
New Generator Connection Application (NC5A) (PDF | 0.24 MB)

Community-led Projects

Community-led applicants must include a completed declaration form with their application:

 

ECP-2 Declaration of Community Led Energy Project Form (PDF | 0.21 KB)

Step 3 - Apply

The application form (NC5 / NC5A) must be submitted in electronic format. Electronic files must be submitted or via email to DSOGenerators@esb.ie (all electronic files should be a cumulative maximum of 5MB or less).


Payment Amounts


Customers applying to connect an embedded generator are required to pay an application fee for processing the application. The fee amount depends on the proposed Maximum Export Capacity (MEC) or the proposed increase in MEC (where there is an existing connection agreement in place).

 

Points to Note:

  • New category A (batch) and category B (non-batch) projects with an MEC >0.5MW must pay an application fee deposit of €7,000 (incl. VAT), along with the generator application form and all supplemental documentation.
  • An application fee deposit of €2,000 (incl. VAT) is required for new category C (community-led) project applications.
  • The full application fee will be required from new applicants with MEC≤0.5MW, rather than an application fee deposit.
  • Your application will not be deemed complete until the minimum required payment is received and incomplete applications will not begin to be processed until payment has been received.
  • Go to Make a payment for payment method information. Should you wish to pay by EFT please include the project name as a reference. Your application should advise the reference of the EFT payment for receipting purposes.
  • Once an application has been accepted into an ECP-2.5.1batch and all clarifications have been completed, the balance of the application fee will be invoiced, see the appropriate fees listed below.
Application Fees

 

MIC and Installed AC Generation
Capacity Ranges

A
Demand Capacity (MIC)

B
Installed Generation Capacity (Including Non-Exporting Generation)

C
Shallow Works

Micro-generation*

€0

€0

€0

Mini-generation**

€0

€795

€0

Small-scale generation***

€0

€995

€0

Not covered above ≤ 500 KW

€0€1,888

€0

> 500kW ≤ 1 MW

€0

€10,722

€0

> 1 MW ≤ 2 MW

€7,560

€16,343

€0

> 2 MW ≤ 6MW

€15,121

€21,964

€0

> 6MW ≤ 10 MW

€26,145

€22,226
€22,226

> 10 MW ≤ 20MW

€26,145

€40,094
€41,837
> 20 MW ≤ 100 MW

€42,978

€57,588

€47,938 

> 100 MW

€58,852

€61,679
€54,539


Table 1 - Connection Offer Application Fees (excluding VAT) - 2025

Demand only: Fee = AMIC + CMIC - D
Generation Only: Fee = BIGC + CIGC - D
Demand and Generation: Fee = AMIC + BIGC + MAX [CIGC , CMIC] - D
Where D is the sum of the credits for the pre-feasibility and advanced works studies still relevant.     
Determination of D will be calculated by the relevant System Operator

 

*Micro-Generation is designed to operate in parallel with the electricity network and is a source of electrical energy rated up to and including 25 amperes (≈6kVA) at low voltage [230 volts], when the connection is single phase, or 16 amperes(≈11kVA) at low voltage [230/400 volt], when the connection is three-phase.

 

**Mini-Generation is designed to operate in parallel with the electricity network and is a source of inverter connected electrical energy, and all associated electrical equipment, where the Installed Generator Capacity is less than or equal to the MIC, and is in the range of 25 amperes (6kVA) to 72 amperes (17kVA), when the connection is single-phase or 16 amperes (11kVA) to 72 amperes (50kVA), when the connection is three-phase.

 

***Small Scale Generation is designed to operate in parallel with the electricity network and is defined as a source of connected electrical energy, and all associated electrical equipment, where the Installed Generator Capacity is less than or equal to the MIC, in is the following ranges: Inverter-connected Installed Capacity greater than 72amps (≈50kVA) at three phase and up to 200kVA, or, Synchronous Installed Capacity greater than 6kVA and up to 200kVA.

 

Modification Fees

Level

Initial non-refundable
deposit (excl. VAT)

Balance of fee
(excl. VAT)

Total Fee
(excl. VAT)

Level 1

€1,046

€0

€1,046

Level 1.5

€1,046

€5,260

€6,306

Level 2

€1,046

€10,521

€11,567

Level 2.5

€1,046

€15,964

€17,010

Level 3

€1,046

€21,407

€22,453

Level 3.5

€1,046

€25,830

€26,876

Level 4

€1,046

€30,252

€31,298


Table 2 - Modification Fees (ex-VAT @ 23%)

Useful documents

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