Burn less gas. Upgrade your Prius to a plug-in.
Upgrade your Prius to an electric car on demand.
Plug-In Prius upgrades available: 2 KW, 4 KW, 5 KW, 6 KW, 7 KW, 10 KW, 15 KW
Prius Plug-in with 6 KW Plug-In Supply system.
Plug In with Plug-In Supply
Plug-In Supply manufactures modular plug-in systems for the Toyota Prius and other hybrids.
Do It Yourself and Save
DIY 2 KW System $4,925
Upgradable. Add more batteries in the future.
Upgrade Your Prius
Most Prius cars can be upgraded to plug-ins using our Modular Battery SystemTM. You can double or triple your gas mileage (MPG) or more! Some vehicles are capable of operating for extended periods of time as an EV, at a variety of speeds from city to highway speeds.
You can also add extra battery capacity to some EVs using our modular battery design.
- Systems are made using high quality, high performance, long-lasting components.
- All systems allow access to the spare tire.
- Public charging station (fast charge) compatibility is available (J1772, etc.).
- Our Modular Battery SystemTM is easily moved from car to car, without a hoist, eliminating the worry of payback on your investment.
- All systems are available as Do It Yourself (DIY) or Ready To Install (RTI).
With a Plug-In Supply lithium iron phosphate add-on battery pack you get true plug-in performance at a fraction of the price of a new plug-in car and with much greater range — up to 7 times the electric range.
Contact us to arrange a test drive or place an order.
Call Now! (707) 766-0444
Limited time “Trade-in” Special!
$1,000 off any Plug-In Supply system purchase when you "trade in" any competitor system.
- New modular battery design gains immediate acceptance
Our new modular battery pack design is what everyone wants. The new modular battery design provides access to the spare tire, the pack can be installed by hand without a hoist, and you can move packs easily from car to car. The modular design makes it easy and safe to work on a high voltage battery. Each module has its own plastic box, fuse, and quick connectors to quickly isolate it from the rest of the pack and the car. You can add more batteries any time.
- Modular Battery Packs with cylindrical or prismatic cells
We now offer Modular Battery Packs built using cylindrical or prismatic cells. This allows us to offer many sizes of packs for all kinds of applications. For example, you can buy or build the following packs for the Prius: 2 KW, 4 KW, 5 KW, 7 KW, 10 KW, and 15 KW. These are available as DIY and RTI.
- Save big with our DIY system
Build your own battery pack and save! See all DIY info »
- Arkansas to California on 2.15 gallons of gas
Plug-In Supply supplied two 10 KW battery packs for the 2007 Prius that drove 1,600 miles using just 2.15 gallons of gas. The Tennessean | Newswise | WGNS (starts at 20:30)
- Plug-In Supply BMS
We designed the best lithium battery management system (BMS), which thrives in the harsh conditions inside a large battery pack. It's only available in Plug-In Supply products.
- Installation instructions available
You can now view the pack assembly and system installation instructions to help you decide if you are capable of building your own battery pack — our Do It Yourself (DIY) option — and installing our system in your car. View the instructions »
- Order direct from Plug-In Supply
We sell direct to consumers. Contact us to order »
- Carpool lane access in Georgia
The 15 KW, 10 KW, and 4 KW plug-in systems qualify for carpool lane access in Georgia.
- Approved in Finland
Our systems are now approved conversions in Finland.
- Home Power Hour interview
Hear about the latest updates to Plug-In Supply products in this 40-minute interview with Home Power Hour on Feb. 29, 2012. The interview begins at 10:38. Listen to the podcast »
Get the best of both worlds — an electric car and a normal Prius — in one car!
The plug-in Prius upgrade offers:
- Up to 100 mile range per charge
- Over 100 MPG is possible
Two modes of operation:
- It's a normal hybrid when the system is off
- Flip a switch for 100+ MPG operation
In addition, the Gen 2 Prius has a pure electric mode.
Can your hybrid do this?
"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 10 KW Cylindrical Cell System