[Watchdogs] Utilities thrilled and worried about electric cars [AAS]

Mon Nov 22 07:44:23 CST 2010

  Utilities thrilled and worried about electric cars
 By JONATHAN FAHEY

The Associated Press

Published: 11:07 p.m. Sunday, Nov. 21, 2010

The first mass-market electric cars go on sale next month, and the nation's
electric utilities couldn't be more thrilled — or worried.

Plugged into a socket, an electric car can draw as much power as a small
house. The surge in demand could knock out power to a home, or even a
neighborhood. That has utilities in parts of California, Texas and North
Carolina scrambling to upgrade transformers and other equipment in
neighborhoods where the Nissan Leaf and Chevrolet Volt are expected to be in
high demand.

Not since air conditioning spread across the country in the 1950s and 1960s
has the power industry faced such a growth opportunity. Last year, Americans
spent $325 billion on gasoline, and utilities would love even a small piece
of that market.

The main obstacles to wide-scale use of electric cars are high cost and
limited range, at least until a network of charging stations is built. But
utility executives fret that difficulties keeping the lights on for the
first crop of buyers_and their neighbors_could slow the growth of this new
niche.

"You never get a second chance to make a first impression," says Mike
Rowand, who is in charge of electric vehicle planning at Duke Energy.

Auto executives say it's inevitable that utilities will experience some
difficulties early on. "We are all going to be a lot smarter two years from
now," says Mark Perry, director of product planning for Nissan North
America.

Electric cars run on big batteries that are charged by plugging into a
standard wall socket or a more powerful charging station. A combined 30,000
Nissan Leafs and Chevrolet Volts are expected to be sold over the next year.
Over the next two years, Ford, Toyota and every other major automaker also
plan to offer electric cars.

Governments are promoting the expensive technology as a way to reduce
dependence on foreign oil, cut greenhouse gas emissions and improve air
quality. Congress is offering electric car buyers a $7,500 tax credit and
some states and cities provide additional subsidies that can total $8,000.
The Leaf sells for $33,000 and the Volt sells for $41,000.

Electric cars produce no emissions, but the electricity they are charged
with is made mostly from fossil fuels like coal and natural gas that do.
Still, electric cars produce two-thirds fewer greenhouse gas emissions, on
average, than a similarly sized car that runs on gasoline, according to the
Natural Resources Defense Council.

Driving 10,000 miles on electricity will use about 2,500 kilowatt-hours, or
20 percent more than the average annual consumption of U.S. homes. At an
average utility rate of 11 cents per kilowatt-hour, that's $275 for a year
of fuel, equivalent to about 70 cents per gallon of gasoline.

"Electric vehicles have the potential to completely transform our business,"
says David Owens, executive vice president of the Edison Electric Institute,
a trade group.

Nationwide, utilities have enough power plants and equipment to power
hundreds of thousands of electric cars. Problems could crop up long before
that many are sold, though, because of a phenomenon carmakers and utilities
call "clustering."

Electric vehicle clusters are expected in neighborhoods where:

— Generous subsidies are offered by states and localities

— Weather is mild, because batteries tend to perform better in warmer
climates

— High-income and environmentally conscious commuters live

So while states like North Dakota and Montana may see very few electric
cars, California cities like Santa Monica, Santa Barbara and Monrovia could
see several vehicles on a block. SoCal Edison expects to be charging 100,000
cars by 2015. California has set a goal of 1 million electric vehicles by
2020.

Progress Energy is expecting electric car clusters to form in Raleigh, Cary
and Asheville, N.C. and around Orlando and Tampa, Fla. Duke Energy is
expecting the same in Charlotte and Indianapolis. The entire territory of
Texas' Austin Energy will likely be an electric vehicle hot spot.

Adding an electric vehicle or two to a neighborhood can be like adding
another house, and it can stress the equipment that services those houses.
"We're talking about doubling the load of a conventional home," says Karl
Rabago, who leads Austin Energy's electric vehicle-readiness program. "It's
big."

How big depends on the size of the battery in the car, and how fast the car
is charged.

When plugged into a standard 120-volt socket, the electric car will draw
1,500 watts. By comparison, a medium-sized air conditioner or a countertop
microwave oven will draw about 1,000 watts.

But the car can be charged faster, and therefore draw more power, when
plugged into a home charging station. The first Leafs and Volts can draw
3,300 watts, and both carmakers may boost that to 6,600 watts soon. The
Tesla Roadster, an electric sports car with a huge battery, can draw 16,800
watts. That's the equivalent of 280 60-watt light bulbs.

A modest home in the San Francisco Bay area that doesn't need air
conditioning might draw 3,000 watts at most.

Transformers that distribute power from the electrical grid to homes are
often designed to handle fewer than a dozen. Extra stress on a transformer
from one or two electric vehicles could cause it to overheat and fail,
knocking out power to the block.

The "nightmare" scenario, according to Austin Energy's Rabago: People come
home from work on a hot afternoon, turn on the air conditioner and the
plasma television, blend some frozen cocktail, start cooking dinner on an
electric stove —and plug their car into a home charging station.

An electric vehicle plugged into a standard wall socket poses a different
problem. It will put less stress on a transformer, but it could trip a
circuit breaker if the circuit serves other appliances. Power would go off
in part of the house.

To head off problems, teams of workers at utilities are gathering
information from Nissan and Chevrolet, doing customer surveys and looking at
buying patterns of hybrid gas-electric cars like the Toyota Prius to try to
predict where they might see clusters of electric car buyers.

They are comparing that data with maps of their systems to determine what
equipment might need upgrading first in hopes of avoiding blown circuits in
the neighborhoods of early buyers.

Utilities also hope to convince drivers to program their cars to charge late
at night, when rates are low and most appliances are switched off.

Ted Craver, the chief executive of the parent company of SoCal Edison and a
chairman of an industry electric vehicle planning association, says early
buyers will likely be tolerant of a few hiccups. At the same time, he says,
those are the people utilities should try hard to please. "They turn into
promoters," he says.

Replacing a neighborhood transformer costs a utility between $7,000 and
$9,000, according to SoCal Edison. This is work a utility will often want to
do. With the approval of public utility commissions, utilities can add the
cost of these kinds of upgrades to the rates they charge customers across
their territory.

Utility executives hope the popularity of electric cars will grow as the
vehicles' costs come down and as public charging stations are made available
at malls and along highways. Momentum will gather faster, they predict, if
they minimize the number of home circuits that get blown and neighborhood
transformers that get fried over the next two years. But they know there
will be problems.

"It's like you're about to have a baby," says Duke Energy's Rowand. "You
know it's going to be good, but you also know there's going to be some throw
up and some dirty diapers, and you just hope that it's something you are
prepared for."

___

November 22, 2010 12:07 AM EST

http://www.statesman.com/news/texas/utilities-thrilled-and-worried-about-electric-cars-1065378.html--

Milton Hawkins  milton.hawkins at gmail.com
P.O. Box 1502
Johnson City, Texas 78636-1502
830-868-9075
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