Toyota Prius PHV was unveiled at the March 2016 New York International Auto Show. The second generation Prius PHV was released in the Japanese market in February 2017, with a sales target of more than 30,000 units per year. The PHV's all-electric range is 40 km, twice the range of the first generation model. Toyota targeted the fuel economy in hybrid mode to be equal to or better than regular fourth generation Prius. Unlike its predecessor, the PHV runs entirely on electricity in all-electric mode. The 2017 model year Prius PHV has a different exterior design than the fourth generation Prius. The interior design is also different. The PHV has a four-seat cabin layout, as Toyota decided to improve the car's efficiency to achieve its design goals. The Prius PHV is powered by Toyota's Hybrid Synergy Drive powertrain, combining a 1.8 L gasoline 4-cylinder port-injected inline-4 Atkinson cycle engine coupled with a dual motor generator drive system powered by an 8.8 kWh lithium-ion battery.It is allowed to play the role of a supplemental traction motor while in all-electric mode. Unlike its predecessor, the PHV is capable of running entirely on electricity in charge-depleting mode in more situations. The improved technology allows the Prius PHV to achieve a maximum of 91 hp from the electric motor system in EV mode. It also allowed Toyota to raise the maximum all-electric speed from 100 km/h to 135 km/h, achieving a performance that is nearly as strong in electric mode, and quell concerns with the previous generation car that would not have enough torque for safety if the gasoline engine were entirely kept out of the power flow. Prius PHV charging The Prius PHV has an 8.8 kWh lithium-ion battery that delivers an EPA-rated all-electric range of 40 km, more than double that of the first generation model. On one full tank of regular-grade gasoline and a full electric charge, total range is 1,030 km. Its electric range lags behind the Hyundai Ioniq Plug-in, Hyundai Sonata PHEV and the Chevrolet Volt. To keep up with the demands of charging the larger pack, the onboard charger was upgraded to 3.3 kW, up from 2.2 kW in the Prius Plug-in. The lithium-ion battery pack can be charged in 5.5 hours at 120 volts, or less than half that time at 240 volts. The forced-air-cooled battery pack is located just under and slightly aft of the back seat. Toyota improved the precision in battery cell assembly working together with battery supplier Panasonic. Toyota targeted the fuel economy in hybrid mode to be equal or better than regular fourth generation Prius liftback. To reduce weight, Toyota used aluminum for the hood, and high-tensile strength steel. The Prius PHV features Toyota's first carbon fiber rear hatch, which saves weight, while a dual-wave rear glass design helps cut drag. The 2017 model year Prius PHV has an EPA fuel economy rating in all-electric mode (EV mode), the highest mpg-e rating of any vehicle with an internal combustion engine, making the PHV the most energy-efficient plug-in hybrid when operating in EV mode. However, the combined gasoline/electricity rating is not available yet.