Senator AYRES (New South Wales—Minister for Industry and Innovation and Minister for Science) (14:58): Senator Ghosh, thank you very much for that question. We have made quite a bit of progress indeed. The policy of reducing the cost of household batteries, which was endorsed by the people of Australia in the last election, is building on Australia's success with rooftop solar. Now, indeed, from 1 July, we are implementing cheaper home batteries, and over 15,000 Australian households across the country have taken up those batteries. Since 1 July—28 days—that's 15,000 Australian households already. That's 536 households every single day, signing up, buying batteries, delivering cheaper prices for them and doing a lot of work to stabilise our electricity grid. Senator McDonald: How much does it cost? Senator AYRES: It slashes the price of a battery—Senator McDonald talks about cost—by 30 per cent and, for many of those households, will bring down their energy bills by up to 90 per cent. This involves tens of thousands of people in electorates like Gilmore, where 214 Australian households have taken advantage of the scheme; Macquarie, where 200 Australian households have done so; the seat of Hunter, where 197 Australian households have taken up this offer and delivered cheaper power and cheaper batteries for themselves; Flinders, where 109 households have done so; the seat of Wright, where 238 have done so; and, in Western Australia, where Senator Cash was indulging in a right-wing ideological frolic over the weekend, the seats of Mayo and Tangney. All lead their states. Honourable senators interjecting— Senator AYRES: The Labor seat of— (Time expired) Honourable senators interjecting— The PRESIDENT: Order! I have Senator Ghosh on his feet. Honourable senators interjecting— The PRESIDENT: Senator Ghosh, I haven't called you yet. I'm still waiting for order. Senator Ghosh, first supplementary?