As mentioned in the 42v article they went with that due to 48v nominal being too close to 60v max on alternator/fully charged which is the limit shock hazard.

As mentioned in the 42v article they went with that due to 48v nominal being too close to 60v max on alternator/fully charged which is the limit shock hazard. Not sure what chemistry/cell count will be for the 48v battery (which I assume it has) but 48v could mean 13s - 16s packs.