Converting A Regular Prius Into A Prius Plug-In

Since the writing of this blog post, the Plug-In Supply website is no longer available. We will update this information when we find another company that offers a similar service.

“Imagine driving along in your car, getting 150 miles a gallon or more. A dream? No. It's reality.”

That's what we first hear from Plug-In Supply's website about their Modular Plug-In Battery System, a revolutionary new way to upgrade your hybrid to a full-on electric. For those who don't want to fork over the cash for a Tesla, the Modular Plug-In Battery System is an affordable way to burn less gas and add more efficiency to your hybrid.

Find Your OEM Prius Parts Here

What Is It, And How Does It Work?

Pruis 10kw

A 10KW system in a Gen 3 Prius.

The Modular Plug-In Battery System is an add-on battery that keeps your factory battery charged, helping your car use electricity whenever it can. When the add-on battery is depleted, the system turns off and the car runs as normal.

The Modular Plug-In Battery System works in conjunction with your existing hybrid system. Once installed, you'll be able to turn it on and off with the push of a button.

The modular design allows the battery pack to move easily from car to car or hybrid to EV.

Though the Modular Plug-In Battery System was designed for the Toyota Prius, it also fits many other hybrids including the Toyota Camry, Ford Escape, and even some Honda and Lexus hybrids.

Fuel Economy

It's not out of the realm of possibility to routinely get over 100 mph. According to test results provided by Plug-In Supply, a 2009 Prius with a 10 KW PHEV system achieved 270 mpg city and 568 mpg highway. While these numbers might be hard to reach, it's entirely realistic for you to get triple your normal gas mileage.

Options Available

Prius Battery pack

Each 4 KW battery pack weighs 47 lbs.

Battery packs are available from 3.3 KW to 4 KW, providing ranges from 15 miles to 50 miles. When it comes to ordering, Plug-In Supply gives you two options: either ready to install or a DIY package where you put it together yourself. The DIY package is cheaper, and it also gives you a chance to better understand how the system works, but the ready-to-install option is a good choice as well.

Charging takes 1 hour per kWh with a 120 VAC and 30 minutes per kWh when hooked up to 240v. Check here for prices, charging times, and ranges for each system available.

Features Of The Modular Plug-In Battery

Prius charge plug

The modular design allows for easy charging.

  • The modular design allows the system to be repaired and upgraded easily.
  • All battery packs are available as a Ready to Install (RTI) or Do It Yourself (DIY).
  • Want to take advantage of public charging? Compatibility is available!
  • The Modular Plug-In Battery System is easily transferred from car to car.
  • The battery pack will not affect your vehicle's factory warranty.
  • Want more battery power? You can always add more at any time for more range.
  • Don't worry about the spare tire—you'll still be able to access it when the battery is installed.

What Are Other People Saying?

New technology can be...well, scary. Though Plug-In Supply has sold over 400 battery packs worldwide, you don't have to take it from them or even us when it comes to their effectiveness. You can take it directly from the customers instead. Here's just a few from Plug-In Supply's website:

A 51-mile trip at 213 MPG with charge remaining."My 51 mile round trip consisted of freeway (55-60 MPH), country highway (55 MPH), and town (25-30 MPH) driving. The Prius averaged 213 MPG and hasn't depleted the 10KW charge as of yet. Great product. Too bad for the oil companies!"
— David G., March 2, 2013 | 2007 Gen 2 Toyota Prius, Plug-In Supply 10KW Cylindrical Cell System
It works perfectly. It is amazing."My wife drives to AND from work every day as well as drives workers to lunch and uses no gas at all. Our system can go 35 miles at up to 52 MPH with no gas. If we go farther we can use super hybrid mode and go 100+ miles at 100+ MPG. It works perfectly. It is amazing. It even works in the Phoenix heat. When you use solar like I do it runs for free."
— Jim S.
2,500 miles on a tank of gas."Our client got 2,500 miles on his last tank of gas. Over that time, we've been having temps between 10° and 30° F. The system is working really well. Thanks again for all your help and support. We keep telling folks about your product."
— Garrett F., Minnesota