After October 9 all grid-interactive inverters must be compliant with new Standard. Installers need to be on top of their paperwork because applications can take up to three weeks to process. Applications received between now and October 9 may experience delays

The updated AS/NZS 4777.2:2015 Grid connection of energy systems via inverters – Inverter requirements was published by Standards Australia on 9 October 2015.

AS/NZS 4777.2:2015 specifies requirements and tests for low-voltage inverters for the injection of electric power through an electrical installation into the grid at low voltage.

This new Standard replaces AS 4777:2005 parts 2 and 3, which only applied to inverters up to 30kVA output power. The new Standard is applicable to all inverters that connect to the installation at low voltage (e.g. 230/400V AC), regardless of their rated output.

Another important change in scope is that AS/NZS 4777.2:2015 applies to inverters that have power flow in either direction between the energy source and the grid. This may impact inverters that have a connection that is a ‘grid interactive port’ (see note below).

The Standard has a 12 month transition period that ends on 9 October. After 9 October 2016 all equipment in scope must be fully compliant with the new Standard.

Some of the differences between this and the previous edition include:

  • The inclusion of a balance requirement for multiple phase systems.
  • Revised set-points and limits to match electricity distributor requirements.
  • Inclusion of provisions for demand response and power quality response modes.
  • Inclusion of requirements for electrical safety in accordance with IEC 62109-1 and IEC 62109-2.
  • Inclusion of requirements for multiple mode inverter operation and requirements for systems with energy storage to meet electrical safety requirements in accordance with AS 62040.1.1.


The CEC will endeavour to review and complete relisting by 9 October, however applications received between now and 9 October may experience delays. Please read and follow the instructions on the Solar Accreditation website to prevent any further delays.


The CEC will only accept Certificates from a JAS-ANZ Accredited Certifier or a State Electrical Regulator. A list of approved certifiers can be found on our website.


For more information you can purchase the revised standard from the SAI Global online store, contact Standards Australia or get in touch with the CEC Accreditation Team.