It seems that you want a very porerful system. Go high voltage because you need lower amperage. However finding a high voltage esc is pretty difficult. Maybe go into ebike escs and cool them somehow with a Waterblock or so. For the motor I really don’t know. Perhaps mhz watercraft. They have a motor for this kinda application
it will not be efoil and it will not be jetski, it will be like watter scooter, small and light jetski with efoil motors … 3D design will be ready next weeks and i will post here pictures. Difficult explain without 3D
In short - what is the most poferfull battery, controller and motor for efoil? it will be good for start and for tests
I’d go watercooled QS motor 138 70h with votol 72150 controller. It can push 20kW together with a lipo battery pack. Weight is a bit high but not so critical for you and i never heard anyone burn this motor. i’ve driven one for 30 000 km without issues.