This solar farm has to switch off every second day due to negative prices
And Tailem Bend just so happens to be located in the state – South Australia – which already operates at more than 50 per renewables on a yearly average, and is often at more than 100 per cent, and so has the greatest propensity to experience negative prices.
Indeed, its average price for the month of October was lower than any other state in the main grid, including those dominated by coal. A month, incidentally, when South Australia’s grid emissions also fell, continuing the major reduction in emissions achieved over the last five years as coal was replaced by wind and solar.
But back to Tailem Bend. Over the last two months, negative prices have been occurring so often (due to low demand, good wind conditions and sunny skies) that this solar plant has been obliged to switch off virtually ever second day – on 14 different days in September and 18 days in October, and most days so far in November.