Hyundai Tuscon Fuel Cell
According to Green Car Congress, The US Department of Energy (DOE) seeks for feedback on commercialization of fuel cell range extenders for battery-electric vehicles.
"The US Department of Energy (DOE) has issued a Request for Information (RFI) (DE-FOA-0001145) to solicit feedback from industry, academia, research laboratories, government agencies, and other stakeholders on issues related to the technical and economic feasibility of commercializing fuel cell range extenders for available battery-electric vehicles (BEVs) in the US market."
"DOE’s office of Energy Efficiency & Renewable Energy (EERE) is specifically interested in information on BEV makes and models where an after-market modification to extend the vehicle range using a Polymer Electrolyte Membrane (PEM) fuel cell system would be most feasible."
This indicates that the government is looking for a way to support this technology and it will be interesting to see economic feasibility opinions.
It's rather unlikely that we will see new kinds of range extenders (with fuel cells) any time soon if ever. It's even hard to imagine currently available battery-electric vehicles like Nissan LEAF with range extenders coming before the next-gen LEAF debuts with more range.
On the other side, we see some fuel cell cars like Toyota Fuel Cell Sedan or Hyundai Tuscon Fuel Cell, which have a long road to mass commercialization on higher scale than the limited availability we're seeing now.
Source: Green Car Congress