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Use your Prius car to power your house in an outage

Find out how two resourceful hybrid owners used their Prius to power their houses.

By Claire_Martin Nov 13, 2012 12:32PM

One family in New Jersey and another in Massachusetts were the envy of their neighbors when they harnessed their Toyota Prius batteries to power lights and televisions during the dark days after superstorm Sandy.

It's not the first time electricity-starved hybrid owners have resorted to this technique, and it raised the question: How did they do it? There are two ways: either by connecting an inverter to the car's large battery pack, the one that powers the car, or by plugging into the smaller 12-volt battery, which starts the car.

The former technique has a better power payoff. You could, say, run a load of laundry while your neighbors were burning through their candle supplies. We asked Heath Hofmann, associate professor of electrical engineering at the University of Michigan, how to do it:


  • Purchase a DC-to-AC inverter with a voltage rating corresponding to your car's battery voltage.
  • Hook it up to the battery's two terminals located underneath the cargo hold using electrical wire with the proper current rating.
  • Ideally, you'd place a fuse between one of the battery terminals and the wire.
  • Then you'd turn on the car and let it run.

This is the technique the savvy Massachusetts family used during the Sandy blackout (see the YouTube video below). They used an 800-watt converter connected via extension cord to an AC strip, a setup that enabled them to keep their refrigerator, cable TV and computer chugging along. Other experts suggest buying a manual transfer switch, used with portable gas-powered generators, to ensure that power is not transferred back to the grid, possibly injuring electrical workers fixing downed lines.




The potential downsides to this approach? Electrocution, if you place your hands on both battery terminals, or a small fireball if a tool such as a wrench falls on the terminals.


"Those could be lethal events," Hofmann told MSN Autos, adding that this method requires experience with high-voltage electrical equipment. "It's definitely not recommended for people who don't know what they're doing."


There's no guarantee your car will cooperate with this technique, because some hybrid control systems prevent such drains on the battery. Currently, there is no known generator "hack" for the Chevrolet Volt or other hybrids, because their battery terminals are not as readily accessible. Here's a big disclaimer: Not a single manufacturer condones the practice or will cover any damage to the battery caused by following this advice.

A safer bet for any hybrid owner is to tap into the smaller battery. This can be done with a store-bought inverter plugged into the car's cigarette-lighter outlet. These inverters are commonly used to charge small electronic devices such as smartphones or laptops.

The reason hybrids are so conducive to this type of charging? You can turn on the car without using the engine, which lets you get as much as 30 hours of power on just a gallon of gas. Even if there's a gas shortage, you're good to go.

 

[Source: NBCNews.com, Lowell Sun
140Comments
Nov 13, 2012 3:47PM
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Actually, this can be done with any vehicle and an inverter.
Nov 13, 2012 3:41PM
Nov 13, 2012 3:55PM
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You can apply this to any vehicle...The use of voltage inverters are not exclusive to hybrids..

 

Nov 13, 2012 3:57PM
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I've been doing this for years with my 2004 Wrangler and a 250W inverter. Nothing new here, and one certainly doesn't need a video or a hybrid to figure it out.
Nov 13, 2012 3:59PM
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move to montana where we don't have power anyway ha my coleman lantern works 3 burner stove works will stay cozy in my tent (to heck with the internet ) jokes!!
Nov 13, 2012 4:03PM
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You don't need a hybird to use a power inverter. It will work with any vehicle. I have a 400 watt power inverter on my Goldwing and an 800 watt in my F150 pickup  so I can have 110 AC power.
Nov 13, 2012 3:59PM
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You don't need to spend money on one of this over priced mistakes. Any car will do this and with a lot less chance of fires and electrocution. My one neibor powers his hunting cabin for the Wisconsin 9 day hunt off of a 1989 chevy pickup.He wired a converter to the battery with an inlie fuse runs a cord to the breaker box it takes about 4 galons a season to run a refriglights and 2 elecric heaters.
Nov 13, 2012 3:50PM
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I love my Prius.  I usually don't use over 20 gallons a month.  Every once in awhile not that much.  I love my mileage.  My worst was 43 mpg.  My best was 51 mpg.  To each his own.  I had always driven Toyota Camrys, but am very happy with my new Prius.
Nov 13, 2012 2:03PM
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One more stupid reason for the Prius haters to hate them. According to several bloggers, people that own these cars are idiots. Doesn't seem so in this case.
Nov 13, 2012 6:13PM
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I love my Prius.    I used to drive a Dodge Viper and women would swarm me like moths to

a fire.   Now,  I'm only bothered by those granola-type women that make their own clothes

and have furry  hamsters camped out under their arms.    I only stop at gas stations to

to smell the fumes and to get beef jerky.

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