The SA average for the battery was $230 for the last month. Picking a time when the wind generation was low, at the end of the day (when solar generation was low) meant the yesterday at 6PM, the battery usage spiked at over $6,000.... it's not the usual but was when the battery did what it was supposed to do, supplement the power generation, is misleading. In fact, the moment in time you're trying to use to show how expensive it is to get power from a battery was the worst time in the last 30 days.