Good day, people. I hope this is the right place to ask.
Considering electric outboard on a kayak - I'm tired of my 2.5 HP four-stroke Suzuki. Nice motor, runs forever on 1 liter of gas at 6 mph speed, but... 2.5 HP is more than I need, plenty of noise (quieter than 2-strokes, but I'm sitting next to it, side-mounted), and 30 lbs is heavy on the side (this is THE lightest water-cooled 4-stroke).
Surprisingly, E-outboard market is in poor shape. Zillions of lame Minn Kota - forgive me, anglers on a quite lake standing upright in 150 lbs canoe - I'm in coastal sea waters, need more than 40 lbs thrust, and operate from seating position. Majority of them are either 12V (arrghh, heavy led batteries). Or, if it's 24V and/or thrust > 40 lbs, then it has inconvenient 40"-50" long shaft and weigh as much as my gas motor or even more (yes, without battery).
I'm looking at Torqueedo Ultralight 403 - If I'll come up with THAT much money.
Geared motor max. input power 400W (doesn't sound like much, but propeller thrust is comparable to 1 HP gas motor).
Battery Li-ion 915 Wh, $US 800 (!!!). This is upgrade, stock battery on the motor is merely 320 Wh and you HAVE to buy it with 320 Wh.
Here is the problem: odd voltage
Nominal voltage 29.6
Final charging voltage 33.6
Final discharge voltage 24.0 (what the heck is "final discharge", must be BMS cut-off voltage).
So... If I get 36V*700WH Li-ion or Li-Po ebike battery for $300-400, with max voltage 42V and BMS cut-off 28V, and charge it to 33.6V and run down to to 28V - what will it be in terms of % charge - from 0% to 70%? Though, running it down to 0% is bad, bad.
Considering electric outboard on a kayak - I'm tired of my 2.5 HP four-stroke Suzuki. Nice motor, runs forever on 1 liter of gas at 6 mph speed, but... 2.5 HP is more than I need, plenty of noise (quieter than 2-strokes, but I'm sitting next to it, side-mounted), and 30 lbs is heavy on the side (this is THE lightest water-cooled 4-stroke).
Surprisingly, E-outboard market is in poor shape. Zillions of lame Minn Kota - forgive me, anglers on a quite lake standing upright in 150 lbs canoe - I'm in coastal sea waters, need more than 40 lbs thrust, and operate from seating position. Majority of them are either 12V (arrghh, heavy led batteries). Or, if it's 24V and/or thrust > 40 lbs, then it has inconvenient 40"-50" long shaft and weigh as much as my gas motor or even more (yes, without battery).
I'm looking at Torqueedo Ultralight 403 - If I'll come up with THAT much money.
Geared motor max. input power 400W (doesn't sound like much, but propeller thrust is comparable to 1 HP gas motor).
Battery Li-ion 915 Wh, $US 800 (!!!). This is upgrade, stock battery on the motor is merely 320 Wh and you HAVE to buy it with 320 Wh.
Here is the problem: odd voltage
Nominal voltage 29.6
Final charging voltage 33.6
Final discharge voltage 24.0 (what the heck is "final discharge", must be BMS cut-off voltage).
So... If I get 36V*700WH Li-ion or Li-Po ebike battery for $300-400, with max voltage 42V and BMS cut-off 28V, and charge it to 33.6V and run down to to 28V - what will it be in terms of % charge - from 0% to 70%? Though, running it down to 0% is bad, bad.