By the numbers the 2012 plugin Prius VentureBeat Green by

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TOYOTA Prius Plug-In Hybrid

By the numbers: the 2012 plug-in

Over six days of driving—limited to trips—we put about 103 miles on a Toyota Prius Plug-In, 90.8 miles per gallon. In time, we gave the Prius five full charges and two ones, and according to the trip we covered 77.7 miles in EV

As we ve reported in prior driving the Plug-In, which won t go on sale spring of 2012, will on—or primarily on—electric for up to 14 or so miles per charge, and a full only takes about hours with a standard household power outlet.

are several conversation points and it takes some juggling of to get a grasp of whether the plug-in be right for you. That with two big questions: Firstly, how does the Prius cost to run on power versus normal operation; and secondly, what s the net in carbon footprint and emissions?

Both of those answers are to be dramatically different from to family, depending on how often you to plug in, how far you travel per trip and day, and whether it s possible or at waypoints.

Charges cost than 50 cents a pop

First, the question. According to Toyota John Hanson, the Prius only uses about 3.8 kWh of the s 5.2-kWh capacity (for longevity). Starting with electricity costs me here in Oregon—11.7 cents per kWh, higher than the 11.04-cent average at the end of last year—that each full charge at 44 cents.

With a total of six charges, given the five charges and two partial ones, puts our total cost of at about $2.67.

In a driving that s comparable to what we with the Plug-In—which is to say gentle and with only a couple of to test the power on tap—we ve in the range of 48 mpg in the standard Toyota So we would have used 2.15 gallons of gasoline in a model. At the current national of about $3.54 a gallon, s $7.61 in a standard Prius to those 103 miles.

In our PHEV test car, we 1.13 gallons ($4.01), that $2.67 in electricity—bringing our for the PHEV of $6.68.

Just to this in some way, it is adjusted for 100 miles, at the average of residential electricity:

Prius (100 miles): $6.12

Prius (estimate, 100 mi):

Difference per 100 miles: $0.86

per 10,000 miles: $86

Difference per miles: $860

Payback? not.

With the 2012 Prius Plug-In expected to at $3,500 to $5,000 more a comparable Prius, payback in traditional sense probably isn t to happen—even if gas prices double.

Now let s look at the second issue—emissions. If we six full charges, and capacity is 3.8 kWh, we used a total of 22.8 kWh for 103 miles, or about kWh for 100 miles. That s about 222 kW 10,000 miles, charging the sort of frequency we did (which mean an average twice a day for a annual commuter).

Using the average of 1.297 pounds of CO2 per that s only about 288 of CO2 from our charges. Again the assumption of about 91 mpg in the Plug-In 48 in the standard Prius (from EV Mode use), that s gallons per 100 miles in the Prius, in the Plug-In. Adapting 2.97 tons per miles to 10,000 miles in 1.98 tons.

We then the ratio of fuel used for the (1.10/2.08) and multiply it by that, add in the carbon from plugging in.

Shrink your carbon

Altogether the difference is very with the standard Prius nearly 70 percent more

TOYOTA Prius Plug-In Hybrid

Greenhouse gases (CO2) per miles:

Standard Prius: tons

Prius Plug-In: tons

For other emissions, the has some cleaning-up to do

As for smog-forming it s another matter entirely. going electric greatly our carbon footprint for vehicles, our plants, on average, are much than the tailpipes of our newest, vehicles; coal plants in emit significant amounts of dioxide as well as NOx. argue that increasing the of electric vehicles will the replacement of our oldest dirtiest stations, and in some situations power plants are hundreds of from urban centers, them from contributing to smog issues.

While was harder to calculate, we estimated smog-forming emissions based on the proportion of plugging in, over miles annually. The Plug-In use about 2.2 Mwh per year, and based on in several papers, 2.5 pounds of NOx per MWh is a equivalent average emissions in the U.S. Of course, it varies by region within the U.S.; with your local provider for more information.

Smog-forming pollution per 10,000

Standard Prius (NOx + 0.66 pounds (std

Prius Plug-In (NOx): pounds

Final thoughts: Ask questions for yourself

While the Plug-In probably won t pay off economically, it sense under some if you want to make even of a difference in cutting carbon If you plan to charge it only or drive longer distances, the extra 300 pounds of the larger pack all the time might the gains from charging; a longer-range EV like the Nissan a plug-in with a longer range like the Chevrolet or a hybrid like the Prius or the Fusion Hybrid. On the other if you mainly take short faithfully charge up in between and can cover most of your in EV Mode, you could very cut carbon emissions with a Plug-In—and still have a that s good for longer

Written by , this article originally on High Gear Media’s Authority. one of VentureBeat’s editorial

TOYOTA Prius Plug-In Hybrid
TOYOTA Prius Plug-In Hybrid
TOYOTA Prius Plug-In Hybrid
TOYOTA Prius Plug-In Hybrid

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