Using Odrive 24V with a 6S lipo battery (25.2V max)

Is it possible to use an Odrive 24V board with a 6S battery (25.2V max) ?

The 6S battery max voltage is slightly higher than the spec voltage of the Odrive but is it still acceptable ?

Yes. It’ll be fine to run a 24V odrive with slightly more voltage when the battery is fully charged.