Possibly One of the Lightest E-Foils in the World – My Custom Build
Hi everyone,
I wanted to share my latest custom e-foil build, which I believe might be one of the lightest ever made. It’s been a long process of research, prototyping, and optimization—but the result is a highly responsive and lightweight setup built for performance and fun.
Specs and Components:
• Board: Levitas Boom 29L, full carbon fiber – just 2.7 kg
• Foil: Full carbon construction (mast + wings). The mast has been internally drilled to allow motor cable routing
• Motor Mount: Hollow 3D printed part using HP’s Multi Jet Fusion technology
• Battery Pack: Molicel P50B cells in a 12S4P configuration, 860Wh total capacity
• Total Weight (incl. battery): Approx. 14.7 kg
• Propeller: Folding prop, currently mounted
Riding Characteristics:
Due to the extremely low volume (29L) of the board, this setup is incredibly lightweight and ultra-responsive. Every small input is immediately translated into motion, making it perfect for advanced riders looking for agility and precision.
That said, getting up on the board is quite tricky because of how little buoyancy it offers—this is definitely not a beginner-friendly setup. For now, I’m using a larger front wing to help with stability and lift until I get more comfortable with the board.
Bonus:
With the folding prop currently installed, pumping becomes remarkably easy. This significantly improves glide time once off power and opens the door to more hybrid styles of riding.
The battery pack has been fully integrated into the board and includes a BMS. After extensive testing and configuration, the enclosure was sealed using professional-grade windshield adhesive to ensure long-term durability and waterproofing.
I’ve kept access to the USB-C port via a waterproof extender, allowing me to connect for diagnostics or updates when needed. The power button and charging port are also fully waterproof, and the entire system is protected by a custom 3D-printed cover with a gasket seal.
After the first water test, I noticed a slight venting from the battery enclosure — a clear sign that the compartment went into positive pressure and held it, meaning the waterproof seal was working perfectly and no water ingress occurred. This was a great confirmation that the system is truly sealed.
The mast is connected to the board using a waterproof Cleanse connector rated for up to 50A continuous current. This makes disassembly and transport easier without compromising reliability or performance.
Really nice work! The finished board looks nice with the sealed battery compartment. I hope the esc isn’t getting too hot? Looks like a small fan is the only cooling
anyway p50b changes pretty fast