What is the relation (equation) between mileage output and charging frequency of an electric vehicle?
Not entirely sure if this is what you meant, but I came up with this equation:
Km-Per-Liter = avg. velocity * (24 - charging frequency * avg. charging time) / ((battery capacity / 8.76) * charging frequency) where 8.76 is the conversion factor between kwh and liters of gasoline and the avg. charging time is from 0% to 100%. Do note that this would mean driving an entire day and always only recharging when the battery is at 0%. Also, if at midnight there still is any charge left it will lead to an efficiency drop. This equation also requires you start with empty batteries and therefore need to recharge at least once.