Rack-mount battery reading 114.0V?

I've just come from one of the final days of commissioning a system with 3 Pytes 48100R Lithium batteries. These are 48V nominal 100ah rack-mount batteries and will be connected in parallel, but I haven't done so yet.

Before connecting them together, I understand that they should be within 0.2V, so I turned on each battery in turn and measured the voltage across the output lugs with a meter to check. I got:

1. 114.0V
2. 114.0V
3. 113.6V

I'm pretty weirded out by these voltages since of course I was expecting more like 51.2V. Is this some kind of weird VOC or open-circuit voltage? Is that even a thing with Lithium BMSes? Why would I get this same reading on all 3 (they're brand new I just unboxed them)?