Hello everyone,
After a lot of reading on this forum, it’s time to build an eFoil. Actually two eFoils, because me and my friend want our own boards. We are engineering students trying to keep the costs down as much as possible, while still maintaining performance. Anyway, here is the parts list that I’m ordering soon.
Electronics:
- Motor: Flipsky 65161 120KV 6kW
- ESC: Flipsky 75200 V2.0 Pro water-cooled VESC with a builtin anti-spark switch
- Water pump
- Battery pack: 16S, 2P, 40Ah, LiFePO4, 120A continuous, 200A peak. (EVE C40)
- BMS: 40A DALY Charge-only
- 200A fuse
- Charger: Generic 58.4V 20A
- Remote: Flipsky VX3
- Connectors (not yet decided)
—> Cost: Around 9500 SEK
I know that using a LiFePO4 pack is kind of unusual, but I have seen a few positive reviews of this exact battery configuration here. The main reson for going LiFePO4 is that we have no experience building packs, so we don’t want to burn our houses down. There is no welding required as the pack simply bolts together. Total weight is 12.0kg. It’s just 4kg heavier than the Li-Ion equivalent. +4kg for a completely safe, powerful, high cycle-life battery is an easy tradeoff in my opinion.
Board:
- XPS Foam sheets glued together with expanding foam and cut to shape
- Glass fiber lamination
- Wooden plank to bolt the mast on
- Waterproof inspection hatch commonly used on boats (35x60 cm)
- Smaller waterproof inspection hatch
—> Cost: Around 1500 SEK
The board’s look isn’t a priority. I’m thinking one large waterproof hatch where an enclosed battery pack goes, and another hatch for ESC, waterpump, and receiver.
Foil & prop:
- GONG v3 Ascent 19mm (XL front and rear wing)
- Fliteboard propeller
—> Cost: Around 6700 SEK
I weigh 90kg, so I believe that this setup will work? We have tried to find cheaper foil alternatives without success. It seems stupid to buy an AliExpress no-name foil for a little cheaper than GONG.
Total cost: Around 18000 SEK or 1900 USD