Electric
Vehicles FAQ's
What is an electric vehicle?
An electric vehicle (EV) is one that
draws its power from electricity stored in batteries, instead of from the
combustion of liquid fuels. EVs include handicapped carts, golf carts,
industrial machines, motorcycles and full-sized passenger cars.
What are the advantages of an
electric vehicle?
EVs have many advantages which make
them ideal commuter vehicles or second cars.
-Convenience. EVs do not need
tune-ups, old changes, mufflers, fuel pumps, carburetors, etc.
-No pollution. EVs create no exhaust
fumes, no gas, no coolant, and no waste oil. Even including the pollution from
the utility's power plant, an electric car is 97% cleaner than a gas car.
That's good for the environment, and it also means less hassle for the owner:
no smog inspection is needed, no complex and expensive emission control system
to break down.
-Efficiency An electric motor
provides useful energy more efficiently than a combustion engine. In addition,
no energy is wasted when the car is sitting in stopped traffic. (In Los Angeles
alone, 72 million gallons of gas are wasted annually by waiting in traffic)
-Quiet. EVs are almost completely
silent.
-Durability. Even the best-kept gas
car will eventually need a new engine. An electric motor has a virtually
infinite life span, needing only an occasional change of brushes, which costs
approximately $100.
What does an EV cost?
Today's EVs are either kit cars, gas
cars that have been converted to electric power or purpose built cars such as
GM's EV-1, Ford's Ranger EV or Solectria's Sunrise or
Force (Honda's EV-Plus, Toyota's RAV-4EV & Daimler-Chrysler EPIC are
currently not available).
All numbers given here are averages.
The cost of conversion is about $7500 for components and batteries, and takes
150-200 hours, depending on the features. Assuming you have a chassis,
conversions that included parts and labor run approximately $15,000. Completed
kit-cars run about $20,000 and purpose built cars are generally $25,000 to
$60,000 or lease at $400 to $700 per month. Leased cars usually include full
maintenance and in some cases will include the cost of insurance and a charger.
What are the operating costs?
An EV costs about 4 to 7 cents/mile
for electricity, in any traffic. For comparison, at the cheap gas price of
$3.00/gal., gas costs 16 to18 cents/mile for fuel, depending on traffic. A gas
car also requires maintenance services, averaging $400 to $600 per year, which
an electric car does not need.
How fast can an EV go?
Most can do highway speeds of 55 to
80 mph. The speed record for an EV is 247 mph (White Lightning). Most EVs rate
of acceleration is comparable to a typical gas car. EV-1 is 0 to 60 in 7.6
seconds with a top speed of 80 mph (factory set).
How far can an EV go without
recharging?
The average range is 50-60 miles,
but some EVs can exceed 100 miles on a single charge using lead/acid batteries.
The documented distance record is 375 miles in a Solectria
Sunrise. ZAT recorded 478 miles on a single charge in a delivery van using Zinc
Air batteries. Most production vehicles are now using advanced batteries which
have a range between 80 and 120 miles. However, 90% of the cars in the U.S.
travel 30 miles or less in a day. We recommend you check your average daily
mileage for two weeks to see if you are a candidate for an electric car.
How long does it take to recharge?
This depends on the charger and
power available. Usually EV owners charge overnight. This is an ideal time to
recharge, since electricity rates are lowest in off-peak hours. Some power
companies will give EV owners special low rates for nighttime charging. If the
EV has an onboard charger it can be charged during the day at work as well.
Some types of chargers can be combined to give a faster charge. On board
chargers are now in the range of 10 to 30 lbs. and will plug into either 110 or
220VAC. Some public charging take advantage of 408vac. Most EVs charging at
220vac will reach 80% charging levels in 1 to 3 hours depending on the quality
of the charger.
What if I want to take a long trip?
An EV today is basically a commute
or town car, not a vacation car. Most cars in the U.S. spend most of their time
commuting short distances. Unless you travel a great deal, it is actually
cheaper to rent a gas car for occasional trips than to own, register, pay
insurance and maintain one year-round.
Can I charge my EV with solar
panels?
With current technology, the amount
of panels needed to power a car would be too extensive and not practical to
mount on the vehicle. However, a solar array can be set up at home and used to
charge a battery pack, which can charge the EV. Public parking areas can setup
charging stations similar to one now in use at the Sacramento airport. EVs get
covered parking and the cover is made up of solar panels.
How many batteries does an EV use?
Typically there are 12 to 20, 6 or
12 volt batteries. The batteries are not standard car batteries, but are deep
discharge batteries specially designed to be heavily discharged and recharged
repeatedly. A 72 volt system is the minimum for a road-going car. Some go as
high as 360 volts. The advantages of added voltage must be balanced against the
increased weight and size of the battery pack.
How often must the battery pack be
replaced?
In general commute usage, the
lead/acid batteries will last about 15,000 to 20,000 miles. This depends on the
way the batteries are charged and discharged. New technology batteries are
expected to last up to 100,000 miles but they are currently very expensive to
purchase. It is expected that the cost of these batteries will come down as
production increases.
How much passenger room does an EV
have?
Most EVs on the road today are two
person cars, but many have room for four or five. Most of the EV components can
fit in the space where the gas tank and engine were and newer maintenance free
batteries will fit under the floor board leaving more open storage and
passenger space than current gas cars. There are currently many electric buses
and full size vans in service in many cities.
Can the batteries be recharged by an
onboard generator, or using dynamic braking?
These systems are in use in all
purpose built electric vehicles and can add a significant amount of power which
will extend range (regenerative braking). This also reduces the wear on brakes
which further reduces maintenance costs.
Thanks to
the SVEAA for the use of
their FAQ