I remember there was a lot of hype when this prototype was shown a few months back - seems they've actually achieved the 600 miles on a charge figure, and that's with a 100kWh battery pack. All about efficiency.
https://www.topgear.com/car-news/electr ... gle-charge
Mercedes EQXX concept drives over 600 miles on one charge
Mercedes EQXX concept drives over 600 miles on one charge
Tesla Model 3 Performance
Oversees an 11kWp solar array at work
Oversees an 11kWp solar array at work