The most interesting thing is the low levelized cost of storage offered by this new unit:

At the heart of HaoHan is BYD’s self-developed 2,710 Ah Blade Battery cell, which the company claims is the largest energy storage cell in the world. This next-generation cell delivers three times the capacity of conventional storage batteries, boasts a cycle life of over 10,000 cycles, and reduces the total lifecycle cost per kilowatt-hour to below CNY 0.1 ($0.014) – a milestone that could reshape the economics of large-scale storage.

At 1.4 cents per kilowatt hour to store, that actually puts storage cost below generation cost for solar power. In sunny regions solar without storage has been cheaper than fossil generation for a few years now, but with batteries like these it's going to be cheaper than fossils for overnight usage too.

The other exciting thing is that while this is a Chinese product, we can expect similar cost drops outside of China over time. Today's non-Chinese solar cells are about where Chinese solar cell prices were 5-9 years ago. China gets the low prices first, but global manufacturing costs keep dropping too because the lower costs are driven more by technological improvements than by China-specific factors like inexpensive labor or lax environmental standards.

These prices keep falling faster than the graphs can get updated, which is quite humorous imho.

https://ourworldindata.org/battery-price-decline

https://ourworldindata.org/grapher/average-battery-cell-pric...

https://rmi.org/the-rise-of-batteries-in-six-charts-and-not-...

https://docs.nrel.gov/docs/fy25osti/93281.pdf

https://about.bnef.com/insights/commodities/lithium-ion-batt...

>but with batteries like these it's going to be cheaper than fossils for overnight usage too.

1200eur bought me a reasonable LiPo solar 'buffer battery' for evenings, and ROI is maybe 3 years vs buying fosil fuel electrons at peak tarif. Plus savings from being able to drop the fixed ~70% of my bill grid connection charge.

Anyway, exciting to see that I might soon be able to afford enough storage for cloudy days too. Thanks for the extra details, sounds too good to be true.

That's cool. As a consumer I'm paying ~30 cents per kWh so there would seem to be a lot of room for that sort of thing to reduce prices. I'm in the UK where prices just seem to go up regardless of tech but maybe there's hope.

Using the 3.7V nominal voltage for a lithium cell, that puts the Blade Battery at 10kWh - I think the price provided is for over the entire life of the battery which works out to 10000x10kWh*$0.014/10kWh, which is $140 per kWh. Not expensive, but not particularly remarkable considering modern pack prices.