Senator McALLISTER (New South Wales—Minister for Emergency Management and Minister for Cities) (14:31): I thank Senator Roberts for the question. The senator is right to point to the fact that Australia's electricity system is changing. We have, as I think most senators understand, a fleet of ageing coal-fired power stations that require replacement. I can tell you they are not getting any more reliable. In fact, over the last year, I don't think there's been a day when we haven't had a circumstance where at least one of the coal-fired power generators in the national electricity market has been offline for one kind of maintenance or another. Of course, this arises because we went through nearly a decade when the coalition, while in government, did not land an energy policy. They had 22 policies; none of them landed. Our task as government— The PRESIDENT: Minister McAllister, please resume your seat. Senator Roberts? Senator Roberts: I have a point of order. Standing order 72(3)(c) says, 'Answers shall be directly relevant to each question.' I asked about how much battery capacity your government is planning to build to maintain electricity supply between sunset and sunrise. The PRESIDENT: I will draw the minister to your question. Senator McALLISTER: Of course, our task is actually to restore some measure of order to the energy system so that the investors who build the generation capacity that is necessary to power homes and businesses have the confidence to invest. And that is what the Capacity Investment Scheme has been designed to do. We have just been through a round of the Capacity Investment Scheme where we received very significant commitments to underwriting very significant battery capacity. We do understand the significance of this technology. What the experts tell us is that the most cost-effective way to establish a national energy market that can meet the energy requirements of Australian homes and businesses is a combination of wind, of solar, of batteries and of gas, and that is the policy setting that we— (Time expired) The PRESIDENT: Senator Roberts, first supplementary?