Li-ion battery costs.

[grarpamp]

> https://en.wikipedia.org/wiki/List_of_battery_types
> https://en.wikipedia.org/wiki/Comparison_of_commercial_battery_types
>
> Some people are using nickel-iron NiFe for home...
> cheap, easy to maintain, simple chemicals,
> last forever, simple charging, take lots of abuse.

https://hackaday.com/2021/04/08/electric-vehicle-1900s-style-new-leases-on-old-tech/

Pallets from Asian sources are cheap...