That 15% loss reduces your range from 1000km to 850km? That hardly affects how useful the vehicle is. For EV that’s different story.
How many vehicles have a 650 mile range? Almost none. Plus you can't fill up at home with gasoline, like you can with an EV.
How many vehicles have a 650 mile range? Almost none. Plus you can't fill up at home with gasoline, like you can with an EV.