I've got a bunch of footage to edit together... just need to get out from under work! The good news is that since I've taken so long on part 2 I now have lots of miles on the efoil... lots to report!
@marcram01 I really need to finish part 2! I'm using a "real" battery that was designed for a customer (passed UN and UL) but it is a prototype. I'm using 9 cells series Li-ion 37.8V max. and 5Ah. One pack gives about 18 to 20 minutes of run time up on foil if I slow down. I can fit 2x batteries in the hull for ~40 minutes of foiling. I would recommend going to 12 series cells. Most inexpensive motor controllers (VESC) will handle up to 60V, and you get a huge power advantage from the higher voltage. My motor controller runs out of voltage before it limits current. (The motor windings are too high a resistance to drive more current). The system needs to perform for the start and pop-up at 2-3x the cruising power, so a higher voltage pack will let you pull more than rated power from the motor for 10 seconds before you throttle back. My motor is rated at 650W and I'm pushing 1200W through it during pop-up. I did stare at Dewalt 60V flex-volt packs as an option... I feel that a few of those in parallel would work great for a safe DIY option.
looking forward to see part 2 :)
Great production value on all your videos, excited to see how the "e-assist" board functions in a future part.
Thanks! More coming soon... this stuff still takes me forever to edit...
Very cool.man!!!
Looking for part 2!
I've got a bunch of footage to edit together... just need to get out from under work! The good news is that since I've taken so long on part 2 I now have lots of miles on the efoil... lots to report!
@@luxmonday That's awesome! Excited to see it. You got me looking into building my own board.
Super cool project!!
What battery do you use? Commercial or diy? Voltage?
@marcram01 I really need to finish part 2! I'm using a "real" battery that was designed for a customer (passed UN and UL) but it is a prototype. I'm using 9 cells series Li-ion 37.8V max. and 5Ah. One pack gives about 18 to 20 minutes of run time up on foil if I slow down. I can fit 2x batteries in the hull for ~40 minutes of foiling.
I would recommend going to 12 series cells. Most inexpensive motor controllers (VESC) will handle up to 60V, and you get a huge power advantage from the higher voltage. My motor controller runs out of voltage before it limits current. (The motor windings are too high a resistance to drive more current).
The system needs to perform for the start and pop-up at 2-3x the cruising power, so a higher voltage pack will let you pull more than rated power from the motor for 10 seconds before you throttle back. My motor is rated at 650W and I'm pushing 1200W through it during pop-up.
I did stare at Dewalt 60V flex-volt packs as an option... I feel that a few of those in parallel would work great for a safe DIY option.