I found these while browsing the internet in Taiwan, and thought I would share here.

A little more expensive per KWH than lead acid, but a way better product overall, and close enough to be worth exploring if you are looking at large battery banks. For reference, the heavy plate lead acid batteries I usually put with large solar installations are ~$2250 for 2.5kwh. So these at ~$2800 for 3kwh are a steal, and they are way more space efficient.

https://simpliphipower.com/