I often make the point that it is -watts- (current) that are what is required to do work (move things), and can be compared to horsepower.
watts are volts X amps.
When voltage drops, amps increase to get the same watts to do the same work.
I have for a very long time now, heard and expected the higher voltage batteries to become more common in America, like they are in Europe, but in the USA, the economy has slowed down the "turn over" of trucks, (keeping older units repaired rather than trade up to newer technology trucks). I [for sure] fully agree with Swoop, that a lead acid battery system is the most "cost effective" for most operations.