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Electric cars save cash for city drivers

Posted Friday, October 30th, 2009

 They may miss out on revving their engines at the lights, but urban drivers of electric cars can cut their emissions by two thirds and save up to £3,000 a year. Sound like a fair compromise?

BBC.co.uk, April 2008

Electric cars produce no exhaust fumes, minimal pollution and a third of the CO2 emissions of petrol engines. On top of that they’re tax free, immune to congestion charges, and a full ‘tank’ of fuel costs no more than a pint of milk.

So what’s the snag? Currently, limited range and recharging opportunities, and a lack of driving pizzazz. But could the next generation of electric vehicles change all that?

How does it work? Electric cars use a battery and electric motor to power the vehicle and are charged via a standard mains socket in your home, or at an increasing number of free outdoor charging bays. The average electric car does 60 miles on a single charge with a top speed of 40mph – while higher performance sports cars can do 150 miles and 130mph. There are currently over 100 electricity pumps in the UK – the majority of which are in London. But 250 new points are expected to be added this year across Britain.

How will it make a difference? 1. An electric car run on conventional electricity from a coal-fired generator produces a third of the emissions of a conventional petrol car (64g of CO2 per km compared to 176g CO2 per km) and just over half the emissions of a diesel or hybrid car (104g CO2/km). 2. You can save thousands of pounds a year in running costs
3. If you’re thinking electric car plus green electricity tariff equals carbon neutral transport, you might need to recalculate. green energy

What’s stopping me?
“Max speed, 40mph?” Electric cars are currently best suited to city driving because the average speed of traffic in London, for example, is notoriously just 10mph: 2mph slower than an Edwardian horse-drawn carriage.

“I’ve heard they aren’t safe” Electric cars are classified as ‘quadricycles‘ by the Driver and Vehicle Licensing Agency, so are subject to less stringent safety tests than cars. But one report estimates they are three times less likely than petrol cars to be involved in accidents. Insurers certainly think so – electric cars qualify for the lowest insurance category, group one, because (reckons the AA) their likelihood of getting into dangerous situations is much lower than that of conventional, high-speed cars.

“Won’t the battery go flat as soon as I get out of my road?” Current models manage an average of about 60 miles on a single charge so we can make our average daily commute of 17 miles more than three times between recharges, but out-of-town journeys are of course trickier. Upgrading to more expensive lithium-ion batteries can increase range significantly.

“I’d love to help the planet, but I can’t afford such fancy new technology” Actually, electric cars range in price between £8,900 and £17,000 and, based on the UK average of 10,000 miles a year, you could save £800 a year on fuel, £300 in car tax, up to £2,000 from congestion charges and free parking in London, and get cheap insurance too. On the other hand, the current generation of electric vehicles are unlikely to rack up that sort of mileage due to their limited range.

Fuel and maintenance costs are also about a third of the typical petrol car: about 6.5p per mile as opposed to 20p. Even with the cost of replacement batteries – about £1,500 every three to four years – electric motoring still costs only about 11p per mile.

What’s the debate?
Electric vehicles are exhaust free but critics say that they simply shift the point at which the emissions and pollution is generated to the power station. This is true (in fact, electricity generation accounts for a third of the UK’s climate impact) but power stations are more efficient at generating energy than cars, so emission reductions still hold. You may be tempted to switch your electricity tariff to green energy to reduce your driving emissions to near zero – but think twice before making the jump.

New research published in the journal Environmental Science and Technology in 2008 levels another, less serious, accusation at electric cars: they use more water than fossil fuelled cars. Vehicles running off electricity use about 17 times more water per mile than petrol vehicles because electricity production in power plants requires the withdrawal (and return) of surface water from nearby lakes and rivers. It’s worth bearing in mind, however, that one million electric cars account for just 0.3% of the miles driven by light duty vehicles in the US.


 
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