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Convert Your Prius to a Plug-in Hybrid Electric Vehicle (PHEV): Even More Gas-Efficient!

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Plug in Your Prius, Have Your Hybrid and Electric Vehicle Too!

 

As a Prius owner, I was recently invited to be part of a focus group for Hymotion Hybrid Plug-in Conversion Kits. We weren't told what the focus group was for until near the end of the meeting -- I and the other Toyota Prius owners assumed it was a customer satisfaction survey of some sort. In fact, I didn't even know what Plug-in Hybrid Electric Vehicles (PHEV) were. I am now educating myself, and I would like to share what I've learned.

In short, a plug-in hybrid electric vehicle runs as an electric vehicle until it drains the plug-in battery's power supply, then reverts to normal hybrid mode. While running in EV mode, the car produces zero emissions! So you get better mileage and a more eco-friendly car.

Several auto manufacturers are now working on developing brand-new PHEV models, but Hymotion's conversion kits will allow current hybrid owners to upgrade their vehicles. Hymotion is in the process of hammering out the final details of distribution, cost, warranties, and safety certification, and expects to release conversion kits for the Toyota Prius, Ford Escape, and Honda Civic Hybrids in 2008.

Disclaimer: This review is by an ordinary Toyota Prius owner. I am not an employee of Hymotion nor any car company, and I am not an automotive expert. Consult manufacturers' websites for official information on the products I'm discussing.

Date of this article: Aug. 12 2007

The Hymotion Lithium-Ion Plug-in Prius Battery 

Photos from hybrid car shows on Flickr

The Hymotion Plug-in Hybrid Electric Vehicle (PHEV) 

The Battery Range Extender Module (BREM)

The Hymotion lithium ion battery fills the space beneath the floor of the trunk of a Toyota Prius. I'm not sure where it goes on the Honda Civic and Ford Escape models. No original parts of the drive system are removed or replaced. A small hole is drilled in the back bumper to add an electrical outlet where a power cord can be plugged in. (Here is an article with a good photo).

In the focus group in which I participated, it sounded like Hymotion is pondering creating smaller models with shorter range that cost less and/or take up less space, but at the moment, the range on the BREM battery allows a Prius to drive about 50 miles in "mixed" mode (mostly electric motor, some gasoline engine, especially at higher speeds) before the car reverts to normal hybrid operation. It will be recharged by the Prius' braking system.

The result is a car that gets 100mpg on the highway and 150mph in city driving for 50 miles after being plugged in. I think these figures are using the new, more accurate 2008 EPA testing that replaces the old one (with the new system, hybrids are more accurately measured at about 45mpg rather than the unrealistic 60).

According to the Hymotion FAQ on their website, the Hymotion battery will take about 5.5 hours to recharge at 120V or 4 hours at 240V. The battery being developed for Ford Escape takes longer. The recharge for the battery will cost about $1 with current electricity prices. This may drop depending on whether power companies give night discounts or EV incentives.

One advantage of plugging in the car at night is that this is the lowest-use period for electrical companies, so you're not going to be contributing to grid strain. The other advantage, according to a July 2007 study by the Electric Power Research Initiative, is that since power grids are getting greener -- through increasing use of solar, wind, and other alternative energy sources -- the PHEV will be a greener car as it gets older.

Plug-In Hybrid Electric Vehicle Technology 

The basics -- including "what's a hybrid car?" and "why is this better?"

Plug-In Hybrid feature on CalCars.org and Felix Kramer

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powered by YouTube

Good Websites About Plug-In Hybrid Electric Vehicle Conversion 

Where to Go For More Information

Hymotion.com: From The Horse's Mouth
Here's the company website for Hymotion products, including their Battery Range Extender Module (BREM) conversion kits to turn existing hybrids into plug-in hybrids. Check out the FAQ, or sign up for email updates to be notified when the BREM kits are released to the public.
California Cars Initiative for Plug-In Hybrids
Nonprofit organization promoting plug-in hybrids. Their site provides information on how PHEVs work, why they're a good idea, environmental impact and breaking news on plug-in hybrid technology. Many articles cover technical information and detailed scientific studies.
Plug-In Hybrid Consortium Website
A consortium of parts suppliers working together with auto manufacturers and third parties to accelerate Plug-in Hybrid development. Includes articles on current PHEV-related news.
Electric Auto Association - Plug-in Hybrid Electric Vehicle Wiki
A group of do-it-yourselfers pooling know-how and resources to help technically-experienced owners convert their hybrids to PHEVs. NOT for the everyday hybrid owner. Do-it-yourself modifications will often void manufacturer warranties.

Plug-in Hybrid Car Books and Related Videos 

Plug-in Hybrids: The Cars that will Recharge America

Amazon Price: $11.53 (as of 05/17/2008)

The Essential Hybrid Car Handbook: A Buyer's Guide

Amazon Price: $11.21 (as of 05/17/2008)

Who Killed the Electric Car?

Amazon Price: $9.99 (as of 05/17/2008)

Convert It!

Amazon Price: $24.95 (as of 05/17/2008)

Issues That Still Need to Be Worked On 

Questions About Warranty, Spare Tire, Safety

The basic technology is ready for release in 2008, but a few issues are still in the process of being addressed.

  • Cost. The PHEV conversion kit will only take about 2 hours to install, but new technology isn't cheap. Initially, models will cost several thousand dollars.

  • Warranty. Right now Hymotion is proposing a one-year warranty, but of course the big question is whether the conversion voids existing warranties. Hymotion is in the process of negotiations with Toyota, Ford, and Honda to work out the best deal they can. Also, in my focus group, the facilitator indicated that Hymotion was considering a longer warranty for its system (based partly on focus group responses, I suspect).

  • Spare Tire. I and most of my focus group indicated one chief cause of concern: the new battery takes up the space where the spare tire goes. Our rep said they were going to be providing a tire sealing kit and air compressor to help nurse flat tires along until drivers could reach a service station, but I'm not sure that's good enough. The facilitator also surveyed our opinions about what we'd be willing to pay for a smaller battery with less range (say, 20 miles) in exchange for finding room for the spare tire.

  • Safety. The new battery goes under the trunk and extends almost to the back of the car, whereas the Prius batteries are under the passenger seats. Hymotion-converted vehicles are currently undergoing safety crash tests, especially rear-ending. At the moment, according to the reps we talked to, the safety is "no more, no less" than that of un-converted Hybrids.

  • Distribution. You won't be allowed to install these kits yourself. It sounds like Hymotion will initially have installation centers in major cities (especially in California) and is trying to convince Toyota, Ford, and Honda to allow for dealer installation and/or authorizated installation at well-known automotive maintenance providers like Costco and Sears.

  • Weight. A member of my focus group asked about the weight in the back end of the vehicle, important since Priuses have small tires. The battery we were shown adds 150 more pounds-- the equivalent of one adult or a lot of groceries.

  • Status Display. The prototype we saw had an ugly LED monitor installed in the small compartment below the CD player. The reps said they'd have a better-integrated one in the final design.

Plug-In Hybrids On Flickr 

Many do-it-yourselfers have already converted their hybrids to PHEVs. Some of these are test vehicles by Hymotion or auto manufacturers.

Hybridfest 2006 by MilwaukeeHybridGroup

Hymotion's Plug-In Prius battery.

Plug-in hybrid conversion by Brett L.

Conversion in less than 24 hours.

CalCars.org plug-in hybrid by Mike Weston

Seen in Palo Alto, CA on 6/21/2007.

Hybrid Car and Vehicle News 

A Few Recent Hybrid Auto Headlines and Blogs

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Hybrid Car Plug-In Electric Vehicles on YouTube 


Plug-in Hybrid Electric Vehicles

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Plug-in Hybrid Car : DigInfo

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14892 views
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Google.org RechargeIT: Plug-in Hybrids

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Hymotion Plug-in Hybrid news video 20060329

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7764 views
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Better Than Ethanol? BTL in plug-in hybrid diesel vehicles

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Ford's Hydrogen-Powered, Plug-In Hybrid

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More Recommended Books on Plug-ins and Alternative Fuels 

See Calcars.org for reviews of all these books plus even more great books on alternative energy vehicles.

Winning Our Energy Independence: An Energy Insider Shows How

Avg. Customer Rating: Amazon Rating

Amazon Price: $13.57 (as of 05/17/2008)

Usually ships in 24 hours

Apollo's Fire: Igniting America's Clean Energy Economy

Avg. Customer Rating: Amazon Rating

Amazon Price: $17.13 (as of 05/17/2008)

Usually ships in 24 hours

ZOOM: The Global Race to Fuel the Car of the Future

Avg. Customer Rating: Amazon Rating

Amazon Price: $18.47 (as of 05/17/2008)

Usually ships in 24 hours

Freedom From Oil: How the Next President Can End the United States' Oil Addiction

Avg. Customer Rating: Amazon Rating

Amazon Price: $17.79 (as of 05/17/2008)

Usually ships in 24 hours

Hell and High Water: Global Warming--the Solution and the Politics--and What We Should Do

Avg. Customer Rating: Amazon Rating

Amazon Price: $16.47 (as of 05/17/2008)

Usually ships in 24 hours

Submit Your Own PHEV Links 

Do you know of a good website about plug-in hybrid electric vehicles? How about converted hybrid cars? Share your discoveries here, then vote on the best sites.

Spark Plug Guide

A platinum spark plug requires less maintenance compared to other types of sparkplugs.1 point

Plug-In Hybrid Wannabes Community

A new wikispaces community for hybrids dreaming of becoming plug-ins! Stop back soon; we're just getting started!0 points

RechargeIT.org

RechargeIT is a Google.org initiative that aims to reduce CO2 emissions, end oil dependence and stabilize the electrical grid by accelerating the adop...0 points

"Yes, I Love My Hybrid Car!" Lens 

Whether or not you've got a hybrid, here's a frank review of my 2004 Toyota Prius. Also, you'll find find bumper stickers, t-shirts, license plate frames, and other gifts for the hybrid car owner.

Goverment Review of Alternative Energy Automobiles 

21st Century Complete Guide to Electric Cars and Hybrid Vehicles: Department of Energy and EPA Comparisons, Toyota Prius, Honda Insight, How Hybrids Work, ... Greenhouse Gas Emission Reductions (DVD-ROM)

Amazon Price: $25.00 (as of 05/17/2008)

Beyond the rhetoric (hopefully): EPA comparisons and stats on hybrids, electric cars and other eco-friendly vehicles. Real data for those who need it.

Reader Feedback 

Leave your comments and feedback on this lens!

thomasz

I like this lens. 5 stars to you.

Posted February 12, 2008

pyle_mountain

Great lens, my dad owns a Toyota Prius - I'm emailing him a link to this lens.

Posted February 12, 2008

lisadh

Great lens. Plug-in hybrids are wonderful, even though some of the benefits are decreased by the fact that most electricity still doesn't come from green energy. But it's a start!

Posted January 25, 2008

johnmccollim

Hybrid cars are powered by a combination of an efficient gas engine and by electric motor that helps with accelerations. Batteries that recharge automatically power the electric motor. On this site you will find a large selection of topics covered with expert advice and videos for anyone considering the purchase of Hybrid Cars . http://www.activehybrid.com

Posted November 24, 2007

harry2

Hi,
Nice Lens, I have a Lens about a system that makes sure your car gets a much better mileage. Feel free to visit!
Water4Gas
Get all the info you need on how to Download Movies here.
Harry Rackers

Posted November 19, 2007

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