DG Connection Guides

There are four separate Distributed Generation Connection Guides, each with a corresponding ‘Summary’ guide. The purpose of the summary guides is to act as a quick check, providing only the most useful information in a condensed format. Each full guide has a flowchart that guides you to the most relevant Connection Guide for the Distributed Generation you are planning to install.

The Guides are intended to help you, as an owner or developer of Distributed Generation, to connect your generating plant to one of the UK's electricity distribution networks. A record of all revisions can be found at the rear of each guide. Please note that these are only guides to EREC G98 and G99, not the actual technical engineering documents. Both engineering documents can be freely downloaded from the Distribution Code website.

G98 Distributed Generation Connection Guides

This “summary” guide is written for the developers of distributed generation or storage projects which are covered by Engineering Recommendation (EREC) G98. This covers Project that are:

- Projects with a capacity of 16A per phase or less (if there are multiple generation or storage units connected at the same premises, then 16A is the maximum combined capacity per phase); and

- Projects connected at low voltage (230V single phase, or 400V three phase); and

- Technology which is type tested under the requirements of EREC G98.

1. Distributed Generation Connection Guides - G98 for Single Premises Summary
2. Distributed Generation Connection Guides - G98 for Multiple Premises Summary

The main aim of the Guide is to provide a ‘route map’ of the processes for getting a generation project connected to the distribution network. The Guide provides an overview of the connection process, as well as more details on the application stage

1. Distributed Generation Connection Guides - G98 for Single Premises Full Version
2. Distributed Generation Connection Guides - G98 for Multiple Premises Full Version

G99 Distributed Generation Connection Guides

This “summary” guide is for developers of distributed generation projects which are covered by Engineering Recommendation (EREC) G99. This covers either:

- Projects with a capacity of more than 16 A per phase (if there are multiple generation units connected at the same premises, then 16 A or more is the combined capacity per phase); or

- Projects connected at a higher voltage than 230 V (single phase), or 400 V (three phase; or

- Any projects that are not type tested under the requirements of EREC G98.

1. Distributed Generation Connection Guides - G99 Type A Summary
2. Distributed Generation Connection Guides - G99 Types B - D Summary

The main aim of the Guide is to provide a ‘route map’ of the processes for getting a generation project connected to the distribution network. The Guide provides an overview of the connection process, as well as more details on the application stage

1. Distributed Generation Connection Guides - G99 Type A Full Version
2. Distributed Generation Connection Guides - G99 Type B-D Full Version