❓ Dr. Thomas questions the WA government on the costs and requirements for AC-coupled household battery installations under the WA Residential Battery Scheme, particularly regarding inverters and hybrid systems. The government refers to previous answers.

I refer to the Government’s requirements and compliance costs for the connection of alternating current (AC) coupled households proposing to install batteries to the South West Interconnected System (SWIS) under the Government’s floundering WA Residential Battery Scheme, and I ask:(a) what proportion of residential households serviced by Synergy in the SWIS receive AC electricity supply;(b) what percentage of residential AC supply recipients in the SWIS who want to install a battery in a system that already has solar panels installed will be required to also install a separate inverter to that battery in addition to the existing inverter for the solar panels;(c) what percentage of residential houses connected to the SWIS have existing hybrid inverters connected to solar panels that comply with the Government’s requirements and will not need upgrading when a battery is installed;(d) what percentage of residential AC supply recipients in the SWIS who want to install a new solar panel and battery system are installing a hybrid inverter; and(e) what is the average cost of an inverter for a battery installed on an AC residential system and the cost of a hybrid converter?

(a)   – (c) Refer to the answer provided in Legislative Council Question Without Notice 1043. (d) – (e) Refer to the answer provided in Legislative Council Question Without Notice 1063.