Renewable and Embedded Generators

For Information on connecting generators larger than 6kW single phase or 11kW three phase that may be exporting electricity to the Electricity Network for sale or supply. A single application with a total MEC equal to or larger than 40 MW is to be submitted to the Transmission System Operator (TSO) for initial assessment.

Enduring Connection Policy Stage 2 (ECP-2)
On 10th June 2020, the Commission for Regulation of Utilities (CRU) published its decision on the Enduring Connection Policy Stage 2 (ECP-2), the current pathway for generators, storage and other system services technology projects to connect to the electricity system. Please click here for further information on ECP-2 Policy, available on the CRU Website. 

  • The application window for ECP-2.2 is now closed. Please click here to view the Distribution System Operator (DSO) Publication ECP-2.2 2021 Batch (Categories A, B & C).
  • Please click here to view the updated (July 2022) Joint SO Publication ECP-2.1 2020 Batch (Category A).
  • The application window for ECP-2.3 is scheduled to open to all generating and storage technologies (greater than 0.5MW) from Thursday, 1st September 2022 until 5pm Friday, 30th September 2022.

ECP-2 Categories

  • Category A (Batch): Generation, storage and other system services technology projects (MEC >0.5MW)
  • Category B (Non-Batch): Small-scale generation (11kW<MEC ≤0.5MW), autoproducers and DS3 system services trials (MEC ≤0.5MW)

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  • Category C (Community-led): Community-led renewable energy projects (MEC  ≥ 0.5MW and  ≤5MW). Please note, a subsequent Clarification Note (CRU/21/069) to the ECP-2 Decision (CRU/20/060) was published by the CRU on 1st July 2021, to change the definition of Community-Led Renewable Energy Projects. In Order to be processed under Category C in ECP-2.2 and subsequent ECP batches, Community-Led Projects must be now 100% community-owned.

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Parallel (Non-Exporting) Generators

Non-Exporting Generators, operate in parallel with the electricity distribution system. These generators are relevant to businesses that want to reduce their electricity import by having their own source of power, or for peak-lopping or peak-shaving schemes. Such generators cannot be used to supply or sell electricity via the national grid.

Interface Protection Guidelines
These slides (PDF | 171 KB) outlining guidelines for costs and applicability of Embedded Generation Interface Protection (EGIP) were presented at the CRU Gate 3 Liaison Group meeting as a clarification and update of the Conditions Governing document in June 2013.

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Standby Generators

Standby generators are used by businesses that require emergency generation. They cannot be used to export or sell electricity onto the electricity network. In addition, they cannot operate in parallel with the electricity network.
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Micro-generation is the term which applies when a private individual (e.g. a householder) installs a small generator on his/her property for the purpose of producing electricity for his/her own use.
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Mini-Generation is the term which applies when an electricity customer installs inverter connected generation up to a maximum of 50kVA, at a premises for the purpose of producing electricity. These generators are generally installed to locally produce clean electricity  primarily for self-consumption, thus reducing the need and cost of purchasing electricity. Mini-Generation allows customers to take action to address the issues of climate change, rising electricity prices and reliance on fossil fuels on our journey to a clean electric future together. The Irish Government will soon introduce a scheme to enable excess electricity produced by this type of generator to be sold back to electricity suppliers.      
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Generator Availability Capacity Map

  • ESB Networks have developed an interactive Available Capacity Heatmap which contains capacity information on all our 3-phase LV, MV and HV DSO substations.

  • This Heatmap provides an interface that enables the easy identification of potential transformer capacity in the vicinity of your site.

View Capacity Map

Generator Statistics

  • Connections Made
    Statistical information on all Generators currently connected or contracted for connection to the Distribution System may be found in our Connected and Contracted Generators Section.

  • Performance Monitoring
    A document, called Windfarm Performance Monitoring Process outlines the process that is adopted by EirGrid and ESB in monitoring the performance of Wind Farm Power Stations (WFPS) in terms of the categorisation of controllability assigned following regulatory decision SEM-062-11 for priority Dispatch. This document is available for download here (PDF | 547 KB).

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It is your responsibility

To ensure that a generator is installed by a registered electrical contractor to Safe Electric standards, and that it complies with all governing regulations.

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