Connecting a Generator to operate in parallel with the Electricity Network

Generators that operate in parallel with the electricity distribution system, even for a brief period, are referred to as Paralleled Generation. These generators would typically be used by businesses to reduce their electricity import at certain times or used for peak-lopping or peak-shaving schemes. In general these generators cannot be used to export electricity onto the electrical distribution system.

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.


With the exception of customers who have the status of Exporting Auto-producers, in general these generators cannot be used to export electricity onto the electricity network or to supply or sell electricity via the distribution network. If you wish to connect a generator that is intended to export energy onto the electricity network, go to Connect a Renewable Generator or go to Connect a Micro-Generator.

Step-by-Step Guide to Connecting a Paralleled Generator

Get an Ordnance Survey map (scale 1:2500-1:10560) showing the location of your new generator. Mark the exact location with a red pen. You will also need a detailed site plan (scale 1:100-1:500) showing your new generator.

Apply by post - download the Application Form (NC5) (PDF | 737 KB) or call 1800 372 757 or +353 21 2386555 to request a copy.
Send the completed form together with the Ordnance Survey map and Site Plan to:

Generator Applications
ESB Networks DAC
Leopardstown Road
Dublin 18
D18 XN80


Note: If you are applying for change to an existing connection, you must also include the existing Meter Point Reference Number (MPRN)  for the site.  Any change to the existing MIC will need to be studied by the local area office and may delay the issuance of the Connection Agreement. Any fee associated with increasing/decreasing your MIC will be included in the Connection Agreement.

We will issue you with a quote based on our published Generator Standard Charges (PDF | 349 KB) along with a Connection Agreement, within thirty days.

The Connection Agreement will include:

  • The Maximum Import Capacity (MIC) of your connection.
  • The Maximum Export Capacity (MEC) of your connection (which in this case equates to zero kilovolt-amperes (kVA)).  The MEC is the total capacity you are permitted to export onto the national grid.


The agreement will also reflect the embedded generation capacity and the mandatory interface protection requirements - known as Embedded Generation Interface Protection (EGIP) - with which you must comply.

The testing of the interface protection must be witnessed by an ESB Networks staff member. To make an appointment for testing email or call 1800 372 757 or +353 21 2386555.

Details are contained in the General Conditions for Connection of Industrial and Commercial Customers and Generators to the Distribution System (PDF | 631KB).

Once you have your quote you can pay in the way that suits you best:

Pay by EFT

Pay Online
Pay by Phone -
Call 1800 372 757 or +353 21 2386555
Pay by Post -
Post a cheque, bank draft or postal order to:

ESB Networks
Accounts Receivable
Sarsfield Road
Licence No. FCK 724

The technical data from the completed application will be evaluated to ensure there are no technical or protection omissions which need to be corrected prior to the Witness Test Date.

This data should be submitted at least six weeks prior to any agreed Witness Test Date. You will also need to submit preliminary test results on the installed interface protection. Please note, the Witness Test Date cannot be agreed until the Customer has signed and returned the associated Connection Agreement reflecting the embedded generation being installed.