http://www.greencarcongress.com/2017/03/20170307-hyundaife.htmlHyundai Motor reveals next generation fuel cell concept at Geneva Motor Show; new SUV Fuel Cell model set for launch in 2018
. . . The FE Concept showcases Hyundai Motor’s fourth-generation of hydrogen fuel cell technology . . . When compared with the current generation system used in the Tucson ix35 Fuel Cell, the new technology is 20% lighter, and achieves 10% greater efficiency. In addition, the power density of the fuel cell stack is increased by 30%, boosting the car’s range significantly. . . .
The car is designed to run for more than 800 kilometers (497 miles) between refueling, acknowledging the current limited hydrogen infrastructure. Elements of the FE Fuel Cell Concept will influence an SUV Fuel Cell model set for launch in 2018, which will feature advanced Hyundai Smart Sense driver assistance technologies, alongside an extensive hydrogen-powered range. . . .
Assuming that 800 km (497 miles) is on either the NEDC or the Japanese test, multiplying by 0.7 translates to about 348 miles EPA, 83 miles/31% better than the Tucson.
Another article: http://insideevs.com/hyundai-debuts-497-mile-futuristic-fe-fuel-cell-concept/