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G83/G98 Applications

This process is set out in accordance with the Electricity Networks Association’s Engineering Recommendation G83-2 relating to Recommendations for the Connection of Type Tested Small-scale Embedded Generators (up to 16A per phase) in Parallel with Low Voltage Distribution Systems.

An SSEG is a source of electrical energy rated up to and including 16 Ampere per phase, single or multi-phase, 230/400 V AC. This corresponds to 3.68 kilowatts (kW) on a single-phase supply and 11.04kW on a three-phase supply.

New Engineering Recommendation G98 – ‘Requirements for the connection of Fully Type Tested Micro-generators (up to and including 16 A per phase) in parallel with public Low Voltage Distribution Networks’ is now in effect and generation connected after 26th April 2019 must comply with this document rather than G83. For further information click here.

More information can be found on the ENA website at

Will I need to pay a connection charge?

If you require a connection to a new property or require changes to the service connection at your existing property, you will need to pay a connection charge for the associated works. We will send you a Connection offer which sets out the works required and costs for completing those works.

We will fully fund reinforcement carried out to allow the installation of all equipment at an existing premises which remains connected via an existing low voltage single, two or three phase service fused at or below 100 amperes per phase and metered with whole current metering, provided that:

  • The reinforcement is carried out to allow the installation of equipment as part of a single application for single or multiple installations;
  • Any and all generation equipment installed has a rated output not greater than 16 amperes per phase at any single premises; and
  • All equipment installed which does not constitute a modification to the existing service conforms with the technical requirements of the following standards:
    • BS EN 61000-3-2 Electromagnetic compatibility (EMC) Limits. Limits for harmonic current emissions (equipment input current ≤ 16A per phase)
    • BS EN 61000-3-3 Electromagnetic compatibility limits. Limitation of voltage changes, voltage fluctuations and flicker in public low voltage supply systems, for equipment with rated current ≤ 16A per phase and not subject to conditional connection.

Can I apply for multiple premises on a single application?

There are two types of application;

A single SSEG application covers the connection of one or more generation systems, either single or multi-phase, within a single customer’s installation. Multiple SSEG systems are acceptable within a single customer’s installation provided that the aggregate rated capacity of the systems is not greater than 16A per phase.

A multiple SSEG application covers the connection of SSEG systems at multiple premises if any of the following criteria apply:

  • The post code of addresses is the same when the last two letters are ignored, e.g. ST10 4XX where XX could be any letter;
  • Two or more installations are planned within 500m of each other;
  • Two or more installations are within the same planned development.

What happens next?

Single premises

Once you are confident that you wish to proceed and that your requirements comply with ER:G83, your installer may connect the equipment.

Within 28 days of commission, your installer must complete and submit;

  1. The Installation Commissioning Confirmation form with the type test reference;
  2. A copy of the circuit diagram;

We will check the information submitted and contact your installer should be require any further details. Once all information has been received and checked, we will issue a letter to your installer confirming acknowledgement of the commissioning and operation of the SSEG unit.

Multiple premises

It is advisable to contact us at the earliest opportunity to discuss your installation project. In any case, your installer must submit an Application for Connection – Multiple SSEG form prior to installation and commissioning of multiple/planned SSEG units.

We will make an assessment of the information you have provided. If we identify that works are required, we will contact you to discuss this. We may be able to provide an indication of a smaller programme of works which may be completed without the requirement for reinforcement works. Where we are required to proceed with reinforcement, we will issue you a Connection Offer regardless of whether or not those works are chargeable. We will keep you informed throughout the process and notify you, in writing, when the works have been completed and you may proceed with the installation and commissioning of the generation equipment.

Within 28 days of commission, your installer must complete and submit;

  1. The Installation Commissioning Confirmation form with the type test reference;
  2. A copy of the circuit diagram;

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Apply for a connection

You will need:

  • 10 minutes
  • Your site plans

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