> The fundamental problem is that high power fuel cells are very expensive, linear power with cost. Does anyone talk about using fuel cells as auxiliary range-

> The fundamental problem is that high power fuel cells are very expensive, linear power with cost. Does anyone talk about using fuel cells as auxiliary range-extenders to electric vehicles? If they're best at low power, and also highly efficient, they'd should be very good pootling away in the background, topping up a battery from a tank of methanol.