The negative energy price barrier was breached in Queensland, Australia, where low demand and high rooftop solar power generation pushed the wholesale electricity price to AUD -$100 per megawatt-hour on Wednesday afternoon, July 2. This is mid-winter in Australia, so daily temperatures are mild. Household appliance usage dips in the early afternoon and peaks in mornings and afternoons, so an early afternoon during a sunny Australian winter is the period when solar power is at its zenith.