# EV Cost Savings and Efficiency Calculator

# This program calculates the cost savings of using an electric vehicle (EV)

# compared to an internal combustion engine (ICE) car based on user inputs.

# It supports multiple regions with unit options in L/100km, Imperial MPG, or US MPG,

# and displays appropriate currencies being for cost comparison.

# The program also calculates EV fuel consumption equivalents in MPGe and L/100km.

print ("EV Cost Savings Calculator")

# Function to gather user inputs

def get_user_input():

fuel_cost = ice_efficiency = electricity_cost = ev_efficiency = annual_distance = 0

fuel_unit = fuel_type = ""

while True:

# User selects fuel efficiency unit system (L/100km, Imperial MPG, or US MPG)

fuel_unit = str(input("Select fuel efficiency unit: a) L/100 km, b) Imperial MPG, c) US MPG ")).strip().lower()

if fuel_unit == "a": # Metric system: Liters per 100 km

# Select fuel type (Petrol or Diesel) for ICE vehicle

fuel_type = str(input("Select fuel type: a) Petrol, b) Diesel ")).strip().lower()

if fuel_type in ("a", "b"):

# Collect inputs for cost, efficiency, and annual distance

fuel_cost = float(input("Enter fuel cost per liter: €"))

ice_efficiency = float(input("Enter ICE efficiency (L/100 km): "))

electricity_cost = float(input("Enter electricity cost per kWh: €"))

ev_efficiency = float(input("Enter EV efficiency (km/kWh): "))

annual_distance = float(input("Annual kilometers driven: "))

break

else:

print("Invalid input. Please enter 'a' for Petrol or 'b' for Diesel.")

elif fuel_unit == "b": # Imperial MPG

# Select fuel type (Petrol or Diesel) for ICE vehicle

fuel_type = str(input("Select fuel type: a) Petrol, b) Diesel ")).strip().lower()

if fuel_type in ("a", "b"):

fuel_cost = float(input("Enter fuel cost per liter: £"))

ice_efficiency = float(input("Enter ICE efficiency (Imperial MPG): "))

electricity_cost = float(input("Enter electricity cost per kWh: £"))

ev_efficiency = float(input("Enter EV efficiency (miles/kWh): "))

annual_distance = float(input("Annual mileage: "))

break

else:

print("Invalid input. Please enter 'a' for Petrol or 'b' for Diesel.")

elif fuel_unit == "c": # US gallon

# Select fuel type (Gasoline or Diesel) for ICE vehicle

fuel_type = str(input("Select fuel type: a) Gasoline, b) Diesel ")).strip().lower()

if fuel_type in ("a", "b"):

fuel_cost = float(input("Enter fuel cost per gallon: $"))

ice_efficiency = float(input("Enter ICE efficiency (US MPG): "))

electricity_cost = float(input("Enter electricity cost per kWh: $"))

ev_efficiency = float(input("Enter EV efficiency (miles/kWh): "))

annual_distance = float(input("Annual mileage: "))

break

else:

print("Invalid input. Please enter 'a' for Gasoline or 'b' for Diesel.")

else:

print("Invalid input. Please enter either 'a', 'b', or 'c'.")

return fuel_unit, fuel_type, fuel_cost, ice_efficiency, electricity_cost, ev_efficiency, annual_distance

# Constants

us_gallon = 3.785411784 # US gallons in liters

imperial_gallon = 4.54609 # Imperial gallons in liters

gasoline_energy = 33.705 # kWh per US gallon gasoline (petrol)

diesel_energy = 37.950 # kWh per US gallon diesel

# Conversions for units and energy

conversion_factor = imperial_gallon / us_gallon # Conversion factor: US gallon to Imperial gallon

gasoline_energy_imp = gasoline_energy * conversion_factor # Energy in kWh per Imperial gallon gasoline (petrol)

diesel_energy_imp = diesel_energy * conversion_factor # Energy in kWh per Imperial gallon diesel

kwh_per_liter_gasoline = gasoline_energy / us_gallon # Energy in kWh per liter gasoline (petrol)

kwh_per_liter_diesel = diesel_energy / us_gallon # Energy in kWh per liter diesel

# Function to calculate cost and efficiency parameters

# Outputs cost per unit distance, energy efficiency equivalents, annual costs and savings.

def calculate_parameters(fuel_unit, fuel_type, fuel_cost, ice_efficiency, electricity_cost, ev_efficiency, annual_distance):

if fuel_unit == "a": # Metric system

# Calculations for cost per 100 km and annual cost

ice_fuel_cost_per_100km = fuel_cost * ice_efficiency

ev_energy_cost_per_100km = electricity_cost * (100 / ev_efficiency)

ice_annual_cost = (ice_fuel_cost_per_100km / 100) * annual_distance

ev_annual_cost = (ev_energy_cost_per_100km / 100) * annual_distance

annual_savings = ice_annual_cost - ev_annual_cost

ev_kwh_per_100km = 100 / ev_efficiency

percentage_savings = ((ice_annual_cost - ev_annual_cost) / ice_annual_cost) * 100

# Calculations for ICE kWh consumption and EV equivalent

ice_kwh_per_100km = None

if fuel_type == "a": # Petrol

ice_kwh_per_100km = ice_efficiency * kwh_per_liter_gasoline # kWh/100 km for petrol (gasoline)

ev_l_per_100km_equivalent = (ev_kwh_per_100km / ice_kwh_per_100km) * ice_efficiency

print(f"EV equivalent energy efficiency: {ev_l_per_100km_equivalent:.2f} L petrol / 100 km") # EV equivalent petrol L/100 km

elif fuel_type == "b": # Diesel

ice_kwh_per_100km = ice_efficiency * kwh_per_liter_diesel # kWh/100 km for diesel

ev_l_per_100km_equivalent = (ev_kwh_per_100km / ice_kwh_per_100km) * ice_efficiency

print(f"EV equivalent energy efficiency: {ev_l_per_100km_equivalent:.2f} L diesel / 100 km") # EV equivalent diesel L/100 km

# Output results

print(f"ICE cost per 100 km: €{ice_fuel_cost_per_100km:.2f}")

print(f"EV cost per 100 km: €{ev_energy_cost_per_100km:.2f}")

print(f"ICE annual cost: €{ice_annual_cost:.2f}")

print(f"EV annual cost: €{ev_annual_cost:.2f}")

print(f"Annual savings: €{annual_savings:.2f}")

print(f"5 year savings: €{5 * annual_savings:.2f}")

print(f"10 year savings: €{10 * annual_savings:.2f}")

if ice_annual_cost > ev_annual_cost:

print(f"The EV is {percentage_savings:.2f} % cheaper than the ICE vehicle")

else:

print("The EV is not cheaper than the ICE vehicle given the current costs and efficiencies")

elif fuel_unit == "b": # Imperial MPG

# Calculations for cost per 100 miles and annual cost

fuel_cost_per_gallon = fuel_cost * imperial_gallon # £ per liter to £ per imperial gallon

ice_fuel_cost_per_mile = fuel_cost_per_gallon / ice_efficiency # ICE cost per mile

ev_energy_cost_per_mile = electricity_cost / ev_efficiency # EV cost per mile

ice_annual_cost = (annual_distance / ice_efficiency) * fuel_cost_per_gallon

ev_annual_cost = ev_energy_cost_per_mile * annual_distance

annual_savings = ice_annual_cost - ev_annual_cost

percentage_savings = ((ice_annual_cost - ev_annual_cost)/ice_annual_cost) * 100

# Calculations for ICE kWh consumption and EV equivalent

if fuel_type == "a": # Petrol

ev_mpg_equivalent = ev_efficiency * gasoline_energy_imp

print(f"EV petrol equivalent energy efficiency: {ev_mpg_equivalent:.2f} MPGe")

elif fuel_type == "b": # Diesel

ev_mpg_equivalent = ev_efficiency * diesel_energy_imp

print(f"EV diesel equivalent energy efficiency: {ev_mpg_equivalent:.2f} MPGe")

# Output results

print(f"Ice cost per mile: £{ice_fuel_cost_per_mile:.2f}")

print(f"EV cost per mile: £{ev_energy_cost_per_mile:.2f}")

print(f"ICE annual cost: £{ice_annual_cost:.2f}")

print(f"EV annual cost: £{ev_annual_cost:.2f}")

print(f"Annual savings: £{annual_savings:.2f}")

print(f"5 year savings: £{5 * annual_savings:.2f}")

print(f"10 year savings: £{10 * annual_savings:.2f}")

if ice_annual_cost > ev_annual_cost:

print(f"The EV is {percentage_savings:.2f} % cheaper than the ICE vehicle")

else:

print("The EV is not cheaper than the ICE vehicle given the current costs and efficiencies")

elif fuel_unit == "c": # US MPG

# Calculations for cost per 100 miles and annual cost

ice_fuel_cost_per_mile = fuel_cost / ice_efficiency # $ per gallon / MPG

ev_energy_cost_per_mile = electricity_cost / ev_efficiency # $ per kWh / miles per kWh

ice_annual_cost = ice_fuel_cost_per_mile * annual_distance

ev_annual_cost = ev_energy_cost_per_mile * annual_distance

annual_savings = ice_annual_cost - ev_annual_cost

percentage_savings = ((ice_annual_cost - ev_annual_cost) / ice_annual_cost) * 100

# Calculations for ICE kWh consumption and EV equivalent

if fuel_type == "a": # Gasoline

ev_mpg_equivalent = ev_efficiency * gasoline_energy

print(f"EV gasoline equivalent energy efficiency: {ev_mpg_equivalent:.2f} MPGe")

elif fuel_type == "b": # Diesel

ev_mpg_equivalent = ev_efficiency * diesel_energy

print(f"EV diesel equivalent energy efficiency: {ev_mpg_equivalent:.2f} MPGe")

# Output results

print(f"Ice cost per mile: ${ice_fuel_cost_per_mile:.2f}")

print(f"EV cost per mile: ${ev_energy_cost_per_mile:.2f}")

print(f"ICE annual cost: ${ice_annual_cost:.2f}")

print(f"EV annual cost: ${ev_annual_cost:.2f}")

print(f"Annual savings: ${annual_savings:.2f}")

print(f"5 year savings: ${5 * annual_savings:.2f}")

print(f"10 year savings: ${10 * annual_savings:.2f}")

if ice_annual_cost > ev_annual_cost:

print(f"The EV is {percentage_savings:.2f} % cheaper than the ICE vehicle")

else:

print("The EV is not cheaper than the ICE vehicle given the current costs and efficiencies")

# Main program function

def main():

fuel_unit, fuel_type, fuel_cost, ice_efficiency, electricity_cost, ev_efficiency, annual_distance = get_user_input()

calculate_parameters(fuel_unit, fuel_type, fuel_cost, ice_efficiency, electricity_cost, ev_efficiency, annual_distance)

if name == "__main__":

main()