The battery is a Unit Power brand that I've seen in Amazon which comes in 36v, 48v or 52v. The power supply marked "54.6v" is the output voltage for a 48v power supply. I also mark my power supplies so I don't grab the wrong one. I would take a look at the hub and see if it says 500 watts. If that's the case, then it's most likely a 48v motor and matches up with the battery. The controller, sitting under the power supply, may have some markings to tell you its for a 48v kit. The controller should have a matching connector for the battery and the motor.