It is practically not possible to manufacture waterproof Hub motor or waterproof portable batteries for EV 2 wheeler. Therefore it is advisable to take utmost care to keep battery and hub motor away from waterlogged area, failing which the motor and/or battery may get damaged.
BOSCH an undisputed market leader, publish their hub motors to be IP5 (IP65). It is self explanatory that no other manufacturer would be manufacturing better than IP65. The reason is very obvious due to the design of hub motors. The wires come out of the axle of the motor and the motor rotates around the axis. The seal is bound to break down with constant hammering on the road. Therefore due to it's engineering limitations such motors can't be better than IP5 (IP65). There will be water ingress in the motor in case the motor is submerged under water above the level of axle.
PROTECT YOUR VEHICLE:
1. Park your vehicle away from RAT infested area. They are prone to cut the wiring and damage seat.
2. Remove the battery for charging as well as to protect from waterlogging during heavy rains.
3. Avoid repair from unauthorized service center. They may use the replacement parts that are not designed for Dexpress vehicle. It will void the warranty.