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Don’t wait for electric vehicle infrastructure, you (probably) don’t need it

When fewer than 10% of cars in Sydney travel more than 100 km, do we need charging infrastructure? fa f c c/Flickr

Fast charging stations and battery swap stations are often proposed as being necessary infrastructure for electric cars. But do we need to wait for this infrastructure before we swap our petrol and diesel cars for the latest electric models? Aren’t electric cars just shifting emissions from exhaust pipes to power stations?

Electric cars do not have anything like the range of conventional cars, some of which will go “more than 1000 km on a tank” (though this claim often says as much about the size of the tank as it does about the efficiency of the car). My petrol car warns me that it is empty when it has 100 km range remaining; this is almost as much as the “full” range of some electric cars.

In advertising, cars are depicted cruising at high speed along endless outback highways, or climbing rugged mountain tracks through rainforests, then speeding along a beach at sunset. The reality is much less glamorous. Almost all Australians live in cities, and our cars travel short distances in traffic. In Sydney, fewer than 10% of cars travel more than 100 km per day. The median distance travelled each day is less than 35 kilometres. In the other capital cities, fewer than 5% of cars travel more than 100 kilometres per day.

If we are mostly travelling short distances, do we need a lot of public charging infrastructure? Early experience in the UK and Japan has shown that while EV owners value public charging infrastructure, most charging is done overnight at home.

There are three important reasons why home charging will be dominant:

cars are generally not used at night, and so this is the ideal time to charge
there is a greater availability of electricity at night, at potentially lower cost
a home charging station guarantees you somewhere to charge

The UK Government’s strategy for charging electric cars is:

most charging will occur at home, at night, off peak, using cheaper, lower-carbon electricity
workplaces will provide recharging facilities for their fleets, and for employees who cannot recharge at home
public infrastructure should target places where it is needed and is commercially viable.

Cars that rarely travel more than 100—150 km per day could be replaced with an electric car that is more suited to commuting in a city, and much more efficient than a car capable of towing a caravan across the country.
More theconversation.edu.au

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