Tuesday, August 10, 2010

Why the Volt is a Great Idea



General Motors has had its share of bad ideas over the years, but I think they have a really good one in the Volt.

The Volt is a new electric car that will be released this fall in the USA at a price of $41,000. After government tax credits, that price will be effectively reduced to $33,500.

What's interesting about the Volt is its practicality. First of all, from the outside you would never know it was anything special. It looks like a normal car. It has four doors and a roomy hatch. It has room for four people and their luggage. It has a radio, air conditioning, GPS, and OnStar service. You can fill it with gas, just like an ICE (internal combustion engine) or hybrid car. You can also plug it in to charge the battery, just like a pure electric car.

Yet compared to ICE cars, hybrid cars like the Prius, and pure electric cars like the Tesla, the Volt is very unique. Unlike an ICE car, the Volt is driven by electric power, not a gas engine. Unlike a hybrid car, an electric motor drives the wheels at all times; there is no complex transmission that connects the gas motor to the electric motor. Unlike a pure electric car the Volt has a gas engine in addition to a battery.

The battery in a Volt has more power than the battery in a hybrid, but less power than one in a pure electric car. When fully charged it can carry the car for about 40 miles of normal driving. After that, the gas motor starts up and generates the power to drive the electric motor another 300 miles per tankful.

This resolves the key dilemmas of hybrid and pure electric cars. Hybrid cars run mostly on gas so even on short trips gas is consumed and pollution is created; in the end they are only slightly more efficient than normal ICE cars. Pure electric cars run solely on battery, but when the battery is drained it takes hours to recharge, making the car impractical for long trips and causing a persistent fear of unplanned detours and the possibility of being stranded. But the Volt allows the driver to go as long as they want, stopping for just a few minutes every 300 miles to refill the gas tank.

This key capability will be what allows people to finally embrace an electric car as a practical vehicle. Though most trips and daily commutes are fairly short, we all make long trips from time to time and most of us can't afford to have a different car for those longer trips.

I drive about 40 miles to work and back each day, so on weekdays I will use almost no gasoline. Since the price of electricity per mile is radically lower than the price of gas per mile, I will save a lot of money. I will also generate a lot less pollution. Electricity from the grid has the added benefit of being generated from multiple different fuels (coal, natural gas, oil, nuclear) or even renewable sources like wind and solar power. Much of this power can be generated domestically, eliminating dependencies on foreign energy sources.

This is why I can see the Volt becoming a very popular car, and the first really practical electric car to ever be mass produced. Kudos to the engineers at GM for coming up with such a brilliantly simple concept, and kudos to the management for embracing the concept and getting it to market.

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