HOW ACCURATE IS THE OFFICIAL RANGE OF ELECTRIC CARS?

Range is a key consideration when buying an electric car. Knowing how far you can drive on a full charge may ease any lingering ‘range anxiety’ you have.

All new electric cars have an official range in miles that is quoted by the manufacturer. This is the figure that, with careful driving, you should expect to achieve. However, there are a number of factors that can eat away at those quoted miles.

Before we explore the many variables, it’s worth a brief look at how the range of electric cars is calculated. 

The WLTP test

The Worldwide Harmonised Light Vehicle Test Procedure (WLTP) is the officially approved way of measuring fuel consumption, electric range and carbon dioxide (CO2) emissions for new cars. The figures have to be quoted for all cars registered after January 2019.

The WLTP test cycle was developed using real driving data from around the world – so it’s relatively realistic – certainly more so than the previous New European Driving Cycle (NEDC) test.

For an electric car, the battery must be fully charged at the start of the bench test. Immediately afterwards, engineers reconnect the car to a charger using a cable equipped with an electric meter.

The figures offer a level-playing-field comparison between electric cars. They should still be used as a guide, though – you will need to adjust your driving habits to achieve the quoted range. Furthermore, some influencing factors are out of your control.

Factors that affect electric car range

You can expect to achieve anywhere between 100 and 450 miles from a single charge, depending on the electric car you own. For example, a Seat Mii Electric offers a claimed 160 miles of electric range, while the Mercedes-Benz EQS could manage as much as 453 miles.

How close you get to those figures comes down to the following factors:

  • Temperature – Cold weather can slash electric range by around 40 percent. Tests in the USA also found high temperatures can have a negative impact on EV range
  • Speed – The faster you drive, the more energy you will consume
  • Load – If you drive with three passengers and their luggage, the electric motor will have to work harder, reducing the car’s range
  • In-car technology – Switching on the air conditioning, charging your smartphone and enjoying a heated seat will eat into the range. Use the creature comforts and tech in moderation
  • Terrain – If you live in mostly flat Norfolk or Lincolnshire, you stand more chance of achieving the quoted range than a driver in Devon or the North Yorkshire Moors. Hills are the enemy of electric range
  • Driving style – Testing those 0-62mph times in your Porsche Taycan might be exciting, but the car’s range will suffer. Slow and steady wins this particular race

How to maximise electric range

Taking the above into account will help you get closer to the quoted range, but there are other things you can do to maximise mileage:

  • Slow down – Driving at a steady 40-50mph will ensure you get further on a single charge
  • Go easy on the options and accessories – But not to the detriment of comfort and safety. Driving in the rain without wipers or windscreen demisting isn’t advisable…
  • Regen when possible – Harvesting energy via your car’s regenerative braking should become part of your driving routine
  • Tyre pressures – Make sure your tyres are inflated to the correct pressures
  • Avoid big alloy wheels – The larger the alloys, the less efficient you are. Think about that when you’re specifying your new electric car
  • Choose an eco route – Some sat-navs feature a ‘green route’ option. This should be your choice if you hope to get more from the battery

Our advice would be to use the quoted range figure as a starting point, or even a target to aim for. Browse the online forums and ask fellow electric car owners for a more accurate estimate of your vehicle’s range.

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The post How accurate is the official range of electric cars? appeared first on Motoring Electric.

2021-03-11T09:22:29Z dg43tfdfdgfd