Enduring Connection Policy (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 10th June 2020, the Commission of Regulation for Utilities (CRU) published its decision on ECP-2, which set policy for three annual batches of connection offers (ECP 2.1, ECP-2.2, and ECP-2.3). For further information, please refer to the ECP-2 Decision Paper (CRU/20/060) and ECP-2 Ruleset.

On 4th April 2023, the CRU published the ECP-2.4 decision (CRU202326), a policy update to ECP-2, to address the volume of grid connection applications in a way that promotes optimal use of the existing network considering the system needs, national policy, and consumer interest. Changes from ECP-2 are detailed in the Decision Paper. 

The ECP-2.4 application window is now closed to all Category A (Batch) applicants. Categories B and C applicants may still apply at any time. Please click below to view the joint System Operator (SO) Category A ECP-2.4 Batch and ECP-2.4 Category B and C Batches.

ECP-2.4 Category A Batch          ECP-2.4 Category B and C Batches

Please note that the CRU have recently published a Consultation Paper (CRU/2023163) on Electricity Generation and System Services Connection Policy, available here on the CRU website.

Under ECP-2.4, grid connection applications are categorised as follows:



Offer Target


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 Guide

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 at the link below:

European Network Codes

Related Publications

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