Berlin-based climate research institute Mercator Research Institute on Global Commons and Climate Change (MCC) has released a new study indicating that, in the last decade, the cost of solar power has dropped by 87 percent, and the cost of battery storage by 85 percent.
Well that's a compelling case you make there.
Have a counterpoint:
Solar battery average price in 2018 was $10k for 10kw Its now $12k for 10kw.
So you're actually right! The price has increased.
https://www.solarchoice.net.au/blog/home-solar-battery-storage-system-prices-april-2018/
https://www.solarmarket.com.au/batteries/battery-pricing-and-sizes/
Now do again with the same manufacturer and minus the ridiculous inflation we had in the last couple of years.
You are comparing the average to a high end.