Battery economies of scale, H2 Center South Tyrol.

Study tip: According to a report by Carnegie Mellon University (CMU) and MIT, mass production can only reduce the cost of batteries for electric vehicles to a certain point. It noted that battery economies of scale are exhausted at around 200-300 MWh of annual production.
cmu.edu (summary); sciencedirect.com (Report, charge required)

Video tip: The promotional video for the H2 Center South Tyrol speaks for itself. The center produces ‘green hydrogen’ to refuel 10 fuel cell cars and 5 fuel cell buses. The drivers seem speechless; at least in German. The English translation is a bit more free-flowing.
youtube.com