It is interesting to see how that compares to the much smaller Candela P-12 ferry shuttle. Candela is a an electric hydrofoil.

30 passengers, 336 kWh usable at max range, gives 11 kWh per person. Max range 72 km (40 nautical miles), 0.16 kWh/person/km.

https://candela.com/pro-series/p-12-shuttle/

There's an 'related stories' link down the bottom of the page with a bit more info. The ferry has a runtime of 90 minutes, and the regular trip takes "just over an hour", and a full recharge takes 60-90 minutes, with chargers at both terminals. So a return trip would take 2 hours + 2 charges, so somewhere around 4 hours. So I'd estimate it could do ~6 return trips per day.