Connecting  Synchronised Generators larger than 6kW single phase or 11kW three phase.

This section explains how to connect generators larger than 6kW single phase or 11kW three phase that may be exporting electricity to the Electricity Network for sale or supply.

Note: for connections made after September 2018 some Distribution Code conditions may change, arising from the need to be aligned with European Network Codes. For more information on this see our European Network Codes page.

Enduring Connection Policy Stage 1 (ECP-1)

ESB Networks is currently processing grid connection offers under ECP1 Batch Process and is no longer accepting generator applications for MECs >0.5MW. ECP-2 will be open to all generating and storage technologies towards the end of 2020 when ECP-1 is complete and will be implemented subject to the CRU’s final decision. For further information on ECP-2 please refer to the CRU website here

ECP-1 is the new process for grid connections open to all generating and/or storage technologies. Please refer to the CRU website:  Enduring Connection Policy Stage 1 (ECP-1) for further information on this including the CRU direction and rulesets.

The revised Generator Application Forms (NC5) PDF | 574KB and (NC5A) PDF | 515 KB are available for download from the ESB Networks website for applications of < 0.5MW, Generator applications for projects > 0.5MW will not be accepted until the ECP2 application window opens which is subject to CRU’s final decision, please refer to CRU website.

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 with both the location of your new generator and the site boundary clearly marked with a red pen.

The Generator application forms have now been updated in line with Enduring Connection Policy Stage 1, CRU/18/058. To apply for the 2018 Batch of ECP-1 please complete the appropriate ECP-1 application form: 

Existing applicants that received deemed complete status may apply to be considered for the 2018 batch of ECP-1 while retaining their received complete date and without requiring payment of a new initial application fee deposit / application fee (where MEC ≤ 0.5MW). For information around what details/information can be amended/updated from the original application form, please click here

If your request is possibly eligible for processing as non-batch (for eligibility criteria please see CRU/18/058 and associated rulesets) please complete the appropriate ECP-1 application form:


Enduring Connection Policy (ECP-1) Decision - Capacity Relocation

In line with the CRU Decision Paper – Enduring Connection Policy Stage 1 (ECP-1) CRU/18/058 existing contracted generation applicants are eligible to submit a request to ESB Networks to relocate capacity to a site with planning permission. The deadline for applications for capacity relocation is close of business Friday, 29th June 2018. Any other capacity relocation shall only be permitted in accordance with CRU/18/058 which limits relocations to 100m of the original site boundary. Modification requests can be submitted to ESB Networks by completing a Supplemental Application for Modifications Form ( PDF | 374 KB), the appropriate application form (NC5 / NC5A) and paying the appropriate fee.

The application form (NC5 / NC5A) must be submitted in both paper and electronic format. Electronic files must be submitted on CD or via email to (all electronic files should be a cumulative maximum of 5MB or less).

Send the completed application form together with payment and all necessary documentation to:
Generator Applications
ESB Networks DAC
Leopardstown Road
Dublin 18
D18 XN80

Payment Amounts

Customers applying to connect an embedded generator are required to pay an application fee or a non-refundable deposit 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). A full listing of application fees is contained in Section 6.1 of ruleset CRU/18/059.


Points to Note:

  • If an application fee is up to a value of €7,000 (incl. VAT), the full application fee should be submitted with all NC5 or NC5A generator application forms, if applicable.
  • If an application fee is greater than €7,000 (incl. VAT) then a non-refundable deposit of €7,000 (incl. VAT) should be submitted with all NC5 or NC5A generator application forms, if applicable. 
  • 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. 
  • All cheque payments should be made payable to ESB Networks DAC. 
  • Please email for bank account details, 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 the 2018 Batch for ECP-1 and all clarifications have been completed, the balance of the application fee will be invoiced, see the appropriate fees listed below

MIC and MEC Capacity Ranges  A
Capacity (MIC)
Capacity (MEC)

Shallow Works
0 ≤ 11kW €0 €0 €0
> 11kW ≤ 50kW €0 €778 €0
> 50kW ≤ 500kW €0 €1,587 €0
> 500kW ≤ 1 MW €0 €9,010 €0
> 1 MW ≤ 4 MW €12,706 €18,365 €0
> 4 MW ≤ 10 MW €21,969 €18,584 €18,584
> 10 MW ≤ 20 MW €21,969 €33,691 €35,155
> 20 MW ≤ 100 MW €36,114 €48,391 €40,337
> 100 MW €49,454 €51,829 €45,829

Table 1 - ECP-1 Connection Application Fees (ex-VAT)
    Demand only: Fee = AMIC + CMIC - D
    Generation Only: Fee = BMEC + CMEC - D
    Demand and Generation: Fee = AMIC + BMEC + MAX [CMEC, 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

Level Initial non-refundable
deposit (excl. VAT)
Balance of fee
(excl. VAT)

Total Fee
(excl. VAT)

Level 1 €881 €0 €881
Level 1.5 €881 €4,433 €5,315
Level 2 €881 €8,868 €9,749
Level 2.5 €881 €13,455 €14,336
Level 3 €881 €18,042 €18,923
Level 3.5 €881 €21,769 €22,651
Level 4 €881 €25,497 €26,378

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

As per the CRU decision on ECP-1, the accompanying ruleset, CRU/18/059, details the changes that have been made to the Connection Offer Policy and Process (COPP) paper. In order to effectively implement these changes the System Operators (SOs) have clarified their interpretation of the new rules, in particular how it is envisaged that Chapter 9 will work in practice. This interpretation follows the COPP principle that “where the policies do not directly translate to a case in point, the principles established will be interpreted by the SOs”. In addition, Section 9 ‘Change in Generation Type’ of COPP also states that “Changes in generation technology will generally only be processed as per a new application and be subject to the processing rules that pertain to a new application appropriate to the change in generation technology sought.” While this requirement is only specifically stated in the pre-energisation section it has been implemented for all changes in generation types. The processing rules that now pertain to all technologies (with only limited exceptions) is that planning permission is a requirement. For the avoidance of doubt, the SOs shall implement as follows:

For all applications:

  • Any request for change in generation type, regardless of technology type, will be assessed on a case by case basis per the rules in Chapter 9 in COPP as amended by CRU’s ECP-1 Decision. Originally appendix 4 of COPP was intended as a guide for interpreting the rules in Chapter 9. However, given the changes in ECP-1 it is now dated and no longer necessarily relevant. A new guidance document will be processed in the next review of COPP.
  • Consistent with the build-ready principles espoused in the CRU ECP decision; any change in generation type shall be subject to the same planning permission requirements as set out in CRU/18/058 and CRU/18/059.

For applications prior to energisation:

  • As directed. these rules will apply to all contracted projects except for applications made under ECP-1 in conjunction with the clarifications for all applications above.
  • The rules set out in section 9.2.2 of COPP still apply with the following clarification:
    “Where there is a change from being renewable to non‐renewable or vice versa the party has gained no material advantage over other similar applications based on the original application” – Given that the ECP-1 2018 batch is technology neutral the SOs are satisfied that this clause no longer applies.

For applications post energisation:

  • As directed, these rules will apply to all post energisation projects in conjunction with the clarifications for all applications above.
  • The rules set out in section 9.3.2 of COPP still apply with the following clarification:
    “The SO would be given 2 years notice as to when a transfer of rights is scheduled by a customer to take place.” – All applications made post energisation must be in accordance with the relevant rules set out in the Generation Plant Closure Process. This shall apply even if only part of the MEC is being transferred to another technology type. One aspect of this ruleset is the period of notification that must be given in advance of plant closure i.e. as per Grid Code requirements, generators greater than 50MW – at least three years notice, generators less than 50MW – at least two years notice.

    For further amendments to COPP, please see the CRU Ruleset, CRU/18/059.

This report contains the final list of applicants that will be processed as part of the 2018 batch and the scheduled quarter for issuance of the ECP-1 connection offers.

2018 Batch (ECP-1) Results - Joint SO Publication_January 2020_Final (PDF | 377KB)



For any other ECP-1 queries not covered on our website please refer to CRU/18/058 and the associated rulesets. For any other query please email