A recent (July 2025) winning bid was $US51.59/kWh.

https://reneweconomy.com.au/watershed-moment-big-battery-sto...

> The latest auction in China offered 25 gigawatt hours of capacity for lithium iron phosphate (LFP) batteries over a range of storage periods – 1 hour, 2 hour and 4 hours – and the results (the first time they have been broken down on storage duration) have stunned even seasoned onlookers. The knockout price was a bid of $US51.59/kWh for a four hour battery (the average was $US59/kWh), which Energy Storage News says represents a 30 per cent drop from 2024 levels, and others side was a 15 per cent fall from recent record lows.

It would be exciting if the price continues to decline 15-30 percent per year. Unsure if that’s sustainable at current manufacturing and learning rates, but exciting.