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Connecting Energy Storage Guidance

Energy storage technology allows the capture of generated energy when it is supplemental to needs, so that it can be stored and released at times when it is needed, for example, at times of peak demand. It provides the ability to instantaneously balance power supply and demand and can support power quality management by controlling voltage and frequency when required under emergency conditions.

The use of advanced energy storage technology is seen as the key to increasing flexibility in the distribution system.

What are the benefits associated with energy storage?

There are numerous benefits associated with energy storage, including:

  • Additional revenue for generators in the form of increased energy sales and payments for ancillary services;
  • Deferment in the reinforcement of both transmission and distribution system assets that would otherwise be required to provide additional capacity;
  • Potential benefits for the end user in the form of reduced energy bills; and
  • Provision of system stability during electricity outages

How do I apply?

G99 Fast Track for Storage

A fast track process is available for single phase installations comprising a G98 compliant micro-generator (e.g. solar PV) rated up to 16A and a G98 compliant energy storage device rated up to 16A, where the installation is fitted with an ER G100 compliant Export Limitation Scheme to restrict the export to 16A per phase or less.

Further information on the G99 fast-track process is available here.

All other storage installations

Due to their ability to export onto network, an application for the installation of storage should follow the G99 generation application process. More information on applying for generation is available here.

Where can I find out more?

We have produced a guidance document setting out our views on the role energy storage has to play in the development of our distribution system and how it can help us move towards becoming a Distribution System Operator (DSO) by taking a more active role in managing our network. Information on the application process to connect energy storage is also included. The guidance is available to view here.

The Energy Networks Association have also produced a guidance document. Their guidance is available to view here.