only the 20%-80% range is usable. Your 300mi+ range just turned into 180mi of usable range.

but at the same time, charging 20%-80% is A LOT faster than charging 0-100%. a road trip plan optimized for time almost never plans charge stops above 80% for that reason. it’s better to stay in that charging sweet spot.

Also you do (or should) start trips at 100% charge.