It is very evident Electrovaya plays the long game. To date I don't know of a single battery Electrovaya has supplied to Vicinity. That said, Electrovaya has not had the capacity to supply them. The supply chain is too long and slow. Electrovaya is methodically marching down the path to be able to supply a VMC. Looking at their presentation showing Jamestown progress (production capacity) over time and I see a tremendous volume. VMC must be a part of this projected volume.
It is evident that Vicinity recognizes the quality of the infinity cell. Enough so they have committed to use a product that is not yet manufactured in the quantities they would require. At least they have a backup plan. You always need a plan B.