What is G98?


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Why the new standard? Well, the Energy Networks Association has revised G83 to both modernise the standard and to take into account newer technologies which are now commercially available. The new standard also falls in line with the current European standard EN 50438. The new standard applies to micro-generation up to 16A per phase (3.68kW for single phase or 11.04kW for three phase) based on a 230 volt or 230/400 volt supply respectively. The main changes are that battery storage is considered and that all equipment must be type tested and approved.

G98 is published by the Energy Networks Association (ENA) and comes into effect on 17 May 2019 for Micro-generators commissioned on or after that date. The definition of Micro-generators includes electricity storage devices and hence the new standard also applies to electricity storage devices (batteries). Micro-generators that conform to G98 may be connected in advance of the 17 May 2019 as they will also conform to the existing G83 requirements.

G98 has been written to take account of the EU Network Code on Requirements for Grid Connection of Generators 14 April 2016. All the micro-generators must meet all of the requirements set out in G98. They must have achieved full conformance of fully type tested and have provided proof that the requirements have been met. In order to conform to G98 the customer installation shall conform to the requirements of EN 50438 together with additional requirements also detailed in this document as well as the IEE wiring regulations, BS7671:2018. The purpose of G98 is to explain the technical requirements for connection of Micro-generators for operation in parallel with a public Low Voltage Distribution Network, by addressing all technical aspects of the connection process, from standards of functionality to on-site commissioning.

In accordance with the Electricity Safety, Quality and Continuity Regulations (ESQCR) the Installer is required to ensure that the DNO is made aware of the Micro-generator installation before the time of commissioning or no later than 28 days (inclusive of the day of commissioning) after commissioning. The new standard also comprehensively lists all the testing and commissioning requirements that must be adhered to along with the minimum test results required to provide a satisfactory test result. Onus is now put on the customer to ensure that all safety information is kept up to date. As previously under G83 it is the installers responsibility to notify the local DNO and ensure all paperwork is fully completed and compliant to the new standard.

Full details can be found at the website below –

http://www.dcode.org.uk/assets/uploads/ENA_EREC_G98_published_180516_dsv1_180420_1.pdf

If you need any help with grid connections for renewable energy or battery storage, we provide support from initial budget enquiries all the way to full turnkey of connections. We also run a bespoke grid connection training course. For information on this and other services, please just get in touch with us on 01670 543 009 or email info@narecde.co.uk

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