Battery costs to fall 90%

 

CATL (the world's largest battery manufacturer) has put its new sodium-ion battery into production, and will be starting mass production in December.

• They will initially cost half lithium-ion batteries.  Tesla's batteries cost ~$100/kWh.  CATL's goal is a cost of $10/kWh within a few years, as the technology is perfected and mass production increases.    
• They will last 10,000 cycles (compared to Tesla's 1,500), or 3.6 million miles.  That's million.  And even then, they will still have 80% of their original capacity.  Used as grid batteries and fully discharged every day, sodium-ion batteries will last 27 years.  After 60 years, they will still have 60% of their original capacity.
• So they won't just be cheap to buy, but will have very, very low LCOE/LCOS (levelised cost of storage): 90 cents per MWh of output (assuming a life of 30 years).   4 hours of storage will add just $3.50/MWh to solar electricity; 12 hours just $10.  This will completely remove the need for fossil fuel generation, except in high latitudes, and it will make even existing fully-depreciated and paid-off coal power stations wildly uneconomic.
• They will be able to be charged must faster than lithium-ion, capable of adding 520 km of charge in 5 minutes.
• They will operate over a much wider temperature range: from -40C to +70C.
• They are safe.  Unlike lithium-ion batteries, they won't catch fire even if they are pierced,
• Even their energy density is now respectable (sodium-ion batteries have hitherto had low energy densities), at 175 Wh/kg, comparable with the low end of lithium-ion.

The implications are staggering.  Solar costs continue to fall; battery costs will soon make 12 hours of storage economically feasible, and EV batteries will fall from $6,000 per car to $600, making even small EVs easily cheaper than petrol/diesel cars.

The transition from fossil fuel generation and petrol cars will accelerate.  Emissions from electricity generation and land transport make up ~50% of global emissions.   It seems certain that by 2040, these emissions will have mostly ended.  If we replace fossil fuel heating with heat pumps (and electric heating in high latitudes), this could cut emissions by another 10%.  

We still have to cut emissions from cement, iron and steel, air travel, sea transport and agriculture (a biggie), but we will have travelled a long way down the road to net-zero.

[Update 15/10/2025:  The costs are even lower than I thought.  Here's my updated analysis]