The requirement date in Western Australia for DC isolators to be certified, where they are incorporated in inverters complying with AS/NZS 4777.2:2020, has been extended to 30 June 2022.

This extension acknowledges the challenges manufacturers and suppliers are having with obtaining DC isolator products, including those installed within inverters, certified to AS 60947.3. The current status of approved test labs with accreditation to carry out the required tests has not yet been settled.

From 19 December 2021, all inverters installed must comply with AS/NZS 4777.2:2020 (including the requirement that an inverter's integrated DC isolator to comply with AS 60947.3:2018). However, in Western Australia the compliance date has been extended to 30 June 2022 for suppliers and manufacturers to achieve the required certification of those DC isolators to AS 60947.3.

During this extension period, inverters complying with AS/NZS 4777.2:2020 may be sold or installed whether or not the DC isolator within the inverter is certified, unless specific safety issues are identified.