The rumors claimed BYD’s solid-state batteries have an energy density of 400 Wh/kg, or nearly twice that of current lithium-ion batteries.
The report also stated that BYD’s solid-state EV batteries set a record by gaining a 1,500 km (932 miles) range in just 12 minutes of charging.
According to the report, the test charged the battery to only 80%, claiming the total EV range could reach upwards of 1,875 km (1,165 miles).
BYD did not confirm anything of this report, so take it as a rumor for now. Still this sounds pretty impressive to me.
It seems like a waste to drive with a battery that could power my home for a whole month. My personal guess is that even if possible, very few cars will feature batteries larger than 100 kWh.
If you have the right hookups you can literally power your house with it in an emergency though, and more and more people (like myself) would love a nice little ERV/vanlife situation.