Well, there is a general consensus of 3.0 miles / kWh highway and 3.75 - 4 miles / kWh city for an overall average of 3.3 - 3.5 miles / kWh (85 kWh battery). Mine averages 3.7mi/kwh over mixed driving for the first 2500 miles. But yes, you can charge 80% and it routinely shows 280mi range.