First, please note that we can not guarantee range figures for any kit due to the wide variety of factors that influence range. The range of your EV is determined by two factors, the mile/kWh efficiency and the kWh capacity of the battery pack. Just as a Porsche 911 has different gas mileage (or fuel efficiency) than a Ford Bronco, they also will have different EV efficiencies which are measured in miles/kWh. This number will vary depending on all the factors that influence efficiencies such as aerodynamics and travel speed. Most EV conversions will have a miles/kWh efficiency of between 1.0 - 3.5. So, to get a rough range estimate, use the following formula and multiply the battery capacity measured in kWh by the estimated efficiency of your donor vehicle.  range (miles) = battery capacity (kWh) x estimated efficiency (miles/kWh)