858
Samsung’s 20-year-life EV battery runs 600 miles on 9-minute charge
(interestingengineering.com)
This is a most excellent place for technology news and articles.
How viable would something like this be for powering a home? Solar panels+this?
Not very. There's a different sodium based battery being designed for home storage. Not nearly as energy dense, but will last a very long time, can be left outside the house, and uses cheap components (no lithium or other rare metals).
That's the battery you'll want.
How much is that in loading cable diameter?