Inverters and power conversion equipment (PCE) must be certified to AS/NZS 4777.2:2015

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 Standard applies to inverters that have power flow in either direction between the energy source and the grid.

This replaces AS 4777:2005 parts 2 and 3, which applied to inverters up to 30 kW. The new Standard does not specify a size of inverter, as it is applicable to all inverters that connect to the installation at low voltage (e.g. 240/415V AC).

The Standard had a 12 month transition period and all inverters and PCE had to be fully compliant with the new standard by 9 October 2016 to remain on the Approved Product List. All products that were not relisted showing compliance with the standard by 9 October 2016 were removed.

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.

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.