Hello to you all. I would like to build a coastal day tripper capable of 40-50 miles if possible. I am 110kg old salty sea dog with experience of boat building, commercial fishing, wakeboard instructor to just mention a few. I am looking to make a custom board and battery with off the shelf foil and electrics components. I am thinking that a surfboard shape with more of a V shaped hull/underside with a 95cm mast would be better for the choppy Atlantic weather. My tooling is a little less advanced than some of you folks on here but should be sufficient if not I can out source to pcbway. There is tons of info here and amazing builds. I look forwards to hearing your guys thoughts and advice to accomplish my build
40 to 50 miles is going to require a hell of a battery…
To give you a rough idea, I’m 100kg, using a 13S10P battery (45Ah, around 2.2Kwh) and I could maybe manage 20 miles… My setup isn’t the most efficient compared to what you could find around here, but keep in mind this battery is already 10Kg (22lbs) !!
My point is, to achieve such a range, is gonna take a lot of weight with an adverse effect on ease of use, maneuverability and dare I say, overall fun 
For a 110 kg rider, covering 40 miles is a major endurance feat requiring roughly 3 to 4 times the capacity of a standard eFoil pack.
This might be a good reference for you re distance and normal battery consumption.
Personally I don’t believe what you are considering realistic and/or safe unless you plan on having a boat accompany you for that type of trip.
Cheers alex adds up wasn’t sure what was possible yet. Need to scale back the miles and layoff the bacon and get down to 100kg lol. Also from what I am reading on the hydrofoils the larger the front wing is nessesry for the weight but a medium is better for the rough conditions. After a bit of research I think a V bottom board with a pin tail and pointed nose with a large nose rocker would be best for the Atlantic conditions