Are you really holding up Snowy 2 as a success story? We're past 20bn on Snowy 2 now. Run those numbers against grid scale BESS, on both capacity and peak generation and get back to me - 10 years ago it looked good, now it's not favourable.

OK.

lots of people confuse a $75-$120 / kWh cell price for grid scale battery installed price, which these days is about $300 / kWh.

1 gigawatt hour of installed BESS therefore at current prices is roughly $300 million.

Snowy 2 is 350 gigawatt hours, which would be $105 billion in equivalent batteries which is about $150 billion in Australian dollars, or ~7x cheaper per gwh.