How We Green-Tuned an '04 Prius into a PRIUS+ Plug-In Hybrid!
We’ve taken this well-designed, highly popular advanced vehicle and souped it up—or more accurately, "green-tuned" it! We’ve added batteries and grid-charging, and you get PRIUS+, a "gas-optional or plug-in" hybrid (PHEV). That means no gas when you do your errands on local streets at 35mph. On the highway, it runs just like any other Prius, with the gasoline engine doing most of the work—and the extra batteries kicking in to improve performance at ALL speeds.