[HPEV]

The older EV Gurus like Dave Cloud and Rich "Madman" Rudman and Don "Father Time" Crabtree ran electric hydroplanes where the DC motors would frequently see water shooting right through the motor.

In your conversion, do not worry so much about water on your motor as you should about water and moisture in your controller, DC/DC converter etc. It is these other electronic items and a BMS if you have one, that are more likely to be damaged by water.

If I recall correctly, the underside of a vehicle makes up about 14% of the overall drag and so if you make a good bellypan and seal it up you can help your water issues and improve your aero! (Just remember to have passageways for the water to get back out if it does get in. Or at least a way to check.) Coroplast is a good material for bellypan creation and you cand sometimes find 5ft by 10 ft sheets. Also, rubber pond-liner can be useful.

I'm not sure what your pack voltage is or what components you're running but do heed the advice of others to try and keep water out of the battery pack too but indeed the main thing is likely your controller and other ancillary devices and circuits. REMEMBER also to always have ALL high voltage lines fused with appropriate high voltage fuses. This means that even your EV voltage meter or SOC calculation device should have some low amperage but high voltage DC rated fuses. Standard automotive fuses are not good enough as they are often not rated for more than 32 VDC or so.

You want the DC rated midget fuses like the KLK-D series.

Have fun and with a water resistant EV there's no reason not to pass those gas stations even in the rainy season (unless you want to stop to squeegee your windows! Heh, heh)

-Stephen J-