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June 19, 2007 10:29 AM PDT

Trivia question: How many plug-in hybrids have been made?

Posted by Michael Kanellos
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You've probably read quite a bit about plug-in hybrids. Plug-ins contain more battery cells than regular hybrids and thus can get between 70 to 100 miles to the gallon.

Converting your Prius to a plug-in reduces your gas costs to around $1 a gallon and results in far fewer emissions in most cases.. They can even be used to send electricity to the grid and prevent a brown-out.

So how many are there on the road? 50, according to Felix Kramer, president of Calcars, which promotes the concept and is trying to persuade lawmakers to pass tax breaks for plug-ins. Last month, there were only about 36 plug-ins but Google employees have converted a bunch since then.

The catch? It's not cheap to convert a Prius to a plug-in. The operation costs around $15,000, according to a representative from Hymotion, which peforms hybrid conversions. A substantial portion of the cost goes to the battery. At that level, it's very difficult to justify converting a regular Prius to a plug-in in terms of dollars and cents.

The price, though, will likely decline. Hymotion recently got bought by lithium-ion battery maker A123 systems. Combining a battery company and an installer company will likely reduce the price. General Motors and Toyota have both said that plug-in hybrids are a major priority for them. Plug-ins that come off the production line will, ideally, only cost about $4,000 more than regular hybrids. That should drive sales.

And in case you were wondering, you don't lose trunk space in a plug-in. The extra batteries go in the wheel well. We went for a ride in Felix's car. It's zippy.

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Add a Comment (Log in or register) 1 comment
Correction
by Peter N. Glaskowsky June 27, 2007 6:06 PM PDT
You say "Plug-ins contain more battery cells than regular hybrids and thus
can get between 70 to 100 miles to the gallon."

But the truth is they can get between 0 and a gazillion miles to the gallon.
"Miles per gallon" is a useless figure when there is an outside source of
energy that isn't measured in gallons-- like AC power from a wall outlet.

Certainly those 70 and 100 mpg figures aren't defined by any physical fact;
they're just numbers people throw around.

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See my CNET blog: http://blogs.cnet.com/8300-13512_1-23.html
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About Cleantech

Neal Dikeman is a founding Partner at Jane Capital Partners LLC, advising the technology and venture arms of multi-national energy companies in cleantech. While at Jane Capital, he has cofounded superconducting technology company SC Power Systems, Inc. (now Zenergy Power plc), and wireless technology startup WaiterPad POS Systems, and he is currently involved in launching a new venture in carbon credits. The Cleantech Blog includes posts by Neal and other authors about biofuels, solar, and global warming.


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