This International Standard specifies the procedures for measuring the energy consumption of fuel cell passenger cars and light-duty trucks that use compressed hydrogen and which are not externally chargeable.
ISO 23828:2013 Referenced Document
ISO 10521 Motor vehicle road load; determination under reference atmospheric conditions and reproduction on chassis dynamometer
ISO 14687-2 Hydrogen fuel - Product specification - Part 2: Proton exchange membrane (PEM) fuel cell applications for road vehicles