To tag onto this, what makes RHEL so special? Is it just the support you get from Red Hat or is there something about the distro that makes it so widely used?
Honestly, I don't doubt that they have a battery that could scale up to give thar kind of performance. But, the infrastructure to support it is just not there. Hell, just to run power to the fast charges we have now is barely feasible without upgrading the utility to the property. Point it the bottleneck isn't the battery, it's getting that much power to the battery without resorting to cables and connectors used to provide shorepower to cruise ships.
If you don't have it, store bought is fine.