UKPN

New electricity connections

Distributed Energy Resources (DER) & Generation

Helpful resources and quick links

Helpful resources, quick links and FAQs

FAQs about G88 & G99

Got a question about G88 or G99? Here are some FAQs that may help.

Customers can apply for a flexible connection to lower costs by agreeing to export less energy when there is limited network capacity.

Flexible connections

Find out more

A cost effective option for distributed generation connections over 1MW.

Timed or profiled connections

Register for access to our outage planning application Network Vision to view Extra High Voltage (EHV) outages affecting your site. It’s vital, for all voltage levels, that we have the correct operational contact information for your site. You can view and amend your Site Responsibility Schedule (SRS) so we can inform you of planned works that could impact your site's operation.

DER Owners and Operators

The Embedded Capacity Register (ECR) has replaced the System-Wide Resource Register (SWRR). The Register provides information on Distributed Energy Resources and network requirements. Visit the Embedded Capacity Register page on our Open Data Portal website for more information.

The Embedded Capacity Register

This guide from the ENA is intended to help developers or prospective owners of Distributed Generation, to connect their generation to a distribution system. It may also be useful for installers or manufacturers of Distributed Generation equipment.

ENA 2024 Distributed Generation (DG) Guides Combined

Visit the ENA's website

Use our Network Infrastructure and Usage (NIU) Map to check the approximate locations of our electricity network equipment and where existing demand or generation connections are in place.

Network Infrastructure and Usage (NIU) Map

Discuss your project with us at one of our DER surgeries before completing an application.

Want to discuss your project?

DER surgeries

Find out about different connection types including Ramped, DERMS / Constrained, Timed / Profile Connections and more.

Optimising the Network

Important changes are being made from 30th September 2023 regarding network access rights for new Battery Energy Storage System (BESS) customers.

Revised network access rights for new electricity storage customers

Electricity storage allows you to store electricity and use it at another time.

Apply to connect an energy storage system

We have made changes to our budget estimate process, read our guide for more information.

Changes to our budget estimation process

We’re connecting large scale volumes of renewable energy, enough to power 3.5 million homes – helping to make major headway in achieving Net Zero carbon emissions by 2050.

Facilitating Renewable Energy 

These requirements are details in EREC G59/3-7 and came into effect on 1 September 2022.

Loss of Mains protection requirements

G88 and G99 FAQs

Download FAQs

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<div>UK Power Networks (Operations) Limited standard terms for carrying out connections work can be found at <a rel="noopener" href="https://www.ukpowernetworks.co.uk/internet/en/our-services/public-highway/Connection%20T&amp;Cs%20Sept2016%20v7.pdf" target="_blank">Connection and Diversionary Works Terms and Conditions</a> or obtained by request in writing to Head of Connections Services, Highway Services, Disconnections, General Enquiries and Smart Metering, UK Power Networks (Operations) Limited, 5, York Way, Borehamwood, Hertfordshire, WD6 1DJ. These Terms and Conditions will be the basis for any work carried out following this request.</div>

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If you need this application form in large font, EasyRead or Braille, please call <a href="tel:08001699970">0800 169 9970</a> or email us at <a href="mailto:psr@ukpowernetworks.co.uk">psr@ukpowernetworks.co.uk</a>.
You can also download this application form in different formats and languages on our <a href="/ukpn/power-cut/priority-services/resources-and-downloads/" title="Resources and downloads">resources page</a>.

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If you would like to receive a copy of our Priority Services Register application form in large font, in EasyRead, or in Braille, please call <a href="tel:08001699970">0800 169 9970</a> or email us at <a href="mailto:psr@ukpowernetworks.co.uk">psr@ukpowernetworks.co.uk</a> and we’ll be happy to arrange this for you. You can also download our EasyRead form and language forms from our <a rel="noopener" href="https://www.ukpowernetworks.co.uk/power-cut/priority-services/resources-and-downloads" target="_blank">Priority Services resources and downloads web page</a>.
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Please use the file upload section below to upload supporting documents including: Schematic diagram for the proposed scheme:*
Details of your export limiting scheme such as G100 type test reference or electricity storage manufacturer’s statement of compliance:*
<a rel="noopener" href="https://www.energynetworks.org/industry-hub/resource-library/?search=EREC+G100" target="_blank" title="Go to the Energy Networks Associations website to view more information about EREC G100" data-anchor="?search=EREC+G100">View more information regarding EREC G100</a>.
G98 type verification test report:*
Need help finding your type verification test reports? <a rel="noopener" href="https://www.ena-eng.org/ProductTypeTestRegister/Product.aspx" target="_blank" title="Go to the Energy Networks Association's website to view the ENA Type Test Verification Report Register">Enter details here</a>.
Additional Attachments:
Computer print out (where possible) or other schedule of protection settings;
Electricity meter(s) make and model;
Datasheets of inverter and other installed equipment
* Mandatory items

Your data We are committed to protecting and respecting your privacy. The information you provide will not be used for marketing purposes but we work with two research organisations, Rant &amp; Rave and Explain Research who may contact you for feedback about our service. Your feedback is shared with us and Ofgem, our regulator. We will not sell or pass on your information to any other third party for any purpose. For more information on how we will treat your personal data, please read our <a rel="noopener" href="https://www.ukpowernetworks.co.uk/privacy-policy" target="_blank" title="View our Privacy Policy">Privacy Policy</a>.
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<div class="intro__icon-box">You should not proceed with this application. Your proposed installation falls under EREC G98. Your installer is required to advise us of the intention to use the electricity storage device no later than 28 days (inclusive of the day of commissioning), after the electricity storage device is commissioned. <a rel="noopener" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources" target="_blank" title="Go to our Distribution Energy Resources webpage">View more information</a>.</div>

<div class="intro__icon-box">You should not proceed with this application. If the rated capacity of your installation is 50kW or less (three phase) or 17kW or less (single phase) and you are using EREC G99 type tested inverters please follow the <a rel="noopener" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources#pre3" target="_blank" title="Go to our Distribution Energy Resources webpage" data-anchor="#pre3">G99 simple process</a>. If your installation is not eligible for the <a rel="noopener" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources#pre3" target="_blank" title="Go to our Distribution Energy Resources webpage" data-anchor="#pre3">G99 simple process</a> please follow the <a rel="noopener" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources#pre4" target="_blank" title="Go to our Distribution Energy Resources webpage" data-anchor="#pre4">G99 standard process</a>. To determine whether your inverters are EREC G99 type tested please visit the <a rel="noopener" href="http://www.ena-eng.org/ProductTypeTestRegister/Product.aspx" target="_blank" title="Go to the Energy Networks Association's website to view the ENA Type Test Verification Report Register">ENA Type Test Verification Report Register</a>.</div>

<div class="intro__icon-box">You should not proceed with this application. Your proposed installation falls under EREC G98. Your installer is required to advise us of the intention to use the electricity storage device no later than 28 days (inclusive of the day of commissioning), after the electricity storage device is commissioned. <a rel="noopener" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources" target="_blank" title="Go to our Distribution Energy Resources webpage">View more information</a>.</div>

<div class="intro__icon-box">You should not proceed with this application. If your Distributed Energy Resources (DER) will not be connected via EREC G98 type tested inverters please follow the relevant process as described below:</div>
<ul>
<li>If your Distributed Energy Resources (DER) will be connected via EREC G99 type tested inverters and the rated capacity of your installation is 50kW or less (three phase) or 17kW or less (single phase) please follow the <a rel="noopener" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources#pre3" target="_blank" title="Go to our Distribution Energy Resources webpage" data-anchor="#pre3">G99 simple process</a>. To determine whether your inverters are EREC G99 type tested please visit the <a rel="noopener" href="http://www.ena-eng.org/ProductTypeTestRegister/Product.aspx" target="_blank" title="Go to the Energy Networks Association's website to view the ENA Type Test Verification Report Register">ENA Type Test Verification Report Register</a>.</li>
<li>For all non-type tested inverters please follow the <a rel="noopener" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources#pre4" target="_blank" title="Go to our Distribution Energy Resources webpage" data-anchor="#pre4">G99 standard process</a>.</li>
</ul>

<a rel="noopener" href="https://www.energynetworks.org/industry-hub/resource-library/" target="_blank" title="View more information regarding EREC G100">View more</a> information regarding EREC G100.

<div class="intro__icon-box">You should not proceed with this application. If the export capacity of your installation will not be limited to maximum of 16A per phase you need to follow either the <a rel="noopener" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources#pre3" target="_blank" title="Go to our Distribution Energy Resources webpage" data-anchor="#pre3">G99 simple process</a> or the <a rel="noopener" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources#pre4" target="_blank" title="Go to our Distribution Energy Resources webpage" data-anchor="#pre4">G99 standard process</a> depending on the rated capacity of your installation.</div>

To determine whether your inverters are EREC G98 type tested please visit the <a rel="noopener" href="http://www.ena-eng.org/ProductTypeTestRegister/Product.aspx" target="_blank" title="Go to the Energy Networks Association's website to view the ENA Type Test Verification Report Register">ENA Type Test Verification Report Register</a>.

You should not proceed with this application. If your installation does not comply with the emission limits of Stages 1 or 2 of IEC Technical Report 61000-3-4 you will need to ensure compliance prior to being offered a connection to the distribution network.

<a rel="noopener" href="http://www.dcode.org.uk/assets/images/ENA_ER_G5_Issue_4_Amendment_1_(2005).pdf" target="_blank" title="View more information on emission limits and EREC G5/4-1">View more</a> information on emission limits and EREC G5/4-1.

<div class="p-rich_text_section intro__icon-box">You should not proceed with this application.</div>
<div class="p-rich_text_section"> Our G99 fast track process is only available for single premises connections. </div>
<div class="p-rich_text_section">For multiple premises please follow the relevant process as described below:</div>
<div class="p-rich_text_section"></div>
<ul class="p-rich_text_list p-rich_text_list__bullet" data-stringify-type="unordered-list" data-indent="0" data-border="false" data-border-radius-top-cap="false" data-border-radius-bottom-cap="false">
<li data-stringify-indent="0" data-stringify-border="0">If the rated capacity of your installation is 11.04kW or less (three phase) at 400V or 3.68kW or less (single phase) at 230V please follow the <a rel="noopener" tabindex="-1" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources#pre2" target="_blank" title="Go to our Distribution Energy Resources webpage" class="c-link" data-stringify-link="https://www.ukpowernetworks.co.uk/internet/en/our-services/list-of-services/electricity-generation/distributed-generation-connection/#pre2" data-sk="tooltip_parent" data-remove-tab-index="true" data-anchor="#pre2">G98 multiple premises connections process</a>.</li>
<li data-stringify-indent="0" data-stringify-border="0">If the rated capacity of your installation is 50kW or less (three phase) or 17kW or less (single phase) please follow the <a rel="noopener" tabindex="-1" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources#pre3" target="_blank" title="Go to our Distribution Energy Resources webpage" class="c-link" data-stringify-link="https://www.ukpowernetworks.co.uk/internet/en/our-services/list-of-services/electricity-generation/distributed-generation-connection/#pre3" data-sk="tooltip_parent" data-remove-tab-index="true" data-anchor="#pre3">G99 simple process</a>.</li>
<li data-stringify-indent="0" data-stringify-border="0">If your installation is not eligible for either of the above please follow the <a rel="noopener" tabindex="-1" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources#pre4" target="_blank" title="Go to our Distribution Energy Resources webpage" class="c-link" data-stringify-link="https://www.ukpowernetworks.co.uk/internet/en/our-services/list-of-services/electricity-generation/distributed-generation-connection/#pre4" data-sk="tooltip_parent" data-remove-tab-index="true" data-anchor="#pre4">G99 standard process</a>.</li>
</ul>

By making this application you understand and agree to the Terms and Conditions that:
<ul>
<li>You must install and operate the electricity storage and generation units exactly as described in the application form and in accordance with the EREC G98, EREC G100 and EREC G5/4-1;</li>
<li>If UK Power Networks has reason to believe that the electricity storage and generation units have been installed or are being operated otherwise than exactly as described in the application form and in accordance with the EREC G98, EREC G100 and EREC G5/4-1 it may de-energise the connection and require that witness tests are undertaken in its presence and/or that the customer undertakes such remedial works as it shall deem appropriate; and</li>
<li>The customer shall bear its own and UK Power Networks’ costs associated with any witness tests and / or remedial works that UK Power Networks may require to be carried out if it has reason to believe that the electricity storage and generation units have been installed, or are being operated, otherwise than exactly as described in the application form and in accordance with the EREC G98, EREC G100 and EREC G5/4-1.</li>
</ul>

Please be aware that you are required to provide the commissioning sheets on the day after the planned commissioning date. The contact details of the relevant team will be included in the confirmation email you will receive within 10 working days after submitting the application.
Note: Your planned commissioning date must be at least 10 working days from the date of application, but not more than 3 months in advance as our connection offers are only valid for 3 months.

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Update from the team

<div>UK Power Networks (Operations) Limited standard terms for carrying out connections work can be found at <a rel="noopener" href="https://www.ukpowernetworks.co.uk/-/media/files/highways-services/unmetered-supply-agreements-and-tcs/tscsumc.ashx?la=en&amp;hash=50260ACB6474296B46F41CBEF9FF64F2B0B4A184" target="_blank">Connection and Diversionary Works Terms and Conditions</a> or obtained by request in writing to Head of Connections Services, Highway Services, Disconnections, General Enquiries and Smart Metering, UK Power Networks (Operations) Limited, 5, York Way, Borehamwood, Hertfordshire, WD6 1DJ. These Terms and Conditions will be the basis for any work carried out following this request.</div>

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