Estimating EV Charging Time and Cost
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Questions and Answers

What is the formula to calculate the estimated charging time?

  • Charger / Useable Battery Capacity
  • Charger x Useable Battery Capacity
  • Useable Battery Capacity / Charger (correct)
  • Useable Battery Capacity x Charger
  • What is the tariff for British Gas?

  • 8.95 p/kWh (correct)
  • 9 p/kWh
  • 8.99 p/kWh
  • 7.5 p/kWh
  • What is the efficiency of the Mustang Mach-E with a WLTP Range (combined) of 292 miles?

  • 4.6 miles/kWh
  • 4.1 miles/kWh (correct)
  • 4.2 miles/kWh
  • 4.9 miles/kWh
  • What is the annual home charging cost for the Mustang Mach-E with a WLTP Range (combined) of 292 miles, assuming 12kmpa and using Octopus Intelligent?

    <p>221.92</p> Signup and view all the answers

    What is the useable battery capacity of the Explorer with a WLTP Range (combined) of 374 miles?

    <p>77 kWh</p> Signup and view all the answers

    What is the formula to calculate the cost of charging an EV?

    <p>Tariff x Battery Capacity / 100</p> Signup and view all the answers

    What is the number of off-peak hours for the Mustang Mach-E with a WLTP Range (combined) of 292 miles, using Octopus Intelligent?

    <p>6</p> Signup and view all the answers

    What is the estimated charging time for the Mustang Mach-E with a useable battery capacity of 72 kWh and a charger of 7 kW?

    <p>10.3 hours</p> Signup and view all the answers

    What is the efficiency classification for an EV with an efficiency of 4.1 miles/kWh?

    <p>Good</p> Signup and view all the answers

    What is the annual home charging cost for the Explorer with a WLTP Range (combined) of 239 miles, assuming 6kmpa and using Octopus Intelligent?

    <p>97.91</p> Signup and view all the answers

    Study Notes

    Calculating Estimated Charging Time

    • Estimated charging time is calculated by dividing the useable battery capacity (kWh) by the charger's power (kW)
    • The charge rate slows down as the state of charge exceeds 80%

    Calculating Estimated Cost of Charging an EV

    • Estimated cost of charging is calculated by multiplying the tariff (p/kWh) by the battery capacity (kWh) and then multiplying by 100
    • The cost of charging depends on the provider, tariff, and off-peak hours

    Calculating Estimated Efficiency of an EV

    • Estimated efficiency is calculated by dividing the WLTP range (combined) by the useable battery capacity (kWh)
    • Efficiency scores are categorized as Excellent (5.0+), Good (4.0-4.9), Average (3.0-3.9), and Poor (0-2.9)

    Home Charging - Annual Assumed Running Cost

    • Annual home charging cost is calculated based on the assumptions of only home charging, 7kW home charger, charging during off-peak hours, and Octopus Energy as the provider
    • The cost depends on the tariff, off-peak hours, and number of charging sessions required

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    Description

    Learn how to calculate the estimated charging time and cost for electric vehicles like the Mustang Mach-E and Explorer. Understand the formulas and variables involved in the calculation.

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