Given the same efoil and foil wing. Will a heavier person go through a battery faster than a lighter person? Let’s say 200 pounds vs 165 pounds.
Yes, of course. This applies to all e-drives (e-bike, e-scooter, …).
It will matter even more on efoil since some of the power always is acting to lift the rider. Like an ebike going up a constant uphill.