E-bike watts - How electric bicycle companies are lying to you

thank you , very helpful

Dual 1000w motor and 48v 17,5a is it okay😅

Another interesting thing to mention is if you're counting electrical power vs motor output mechanical power. Mechanical power seems to be what would matter most. You could have a direct drive motor going up a 30% grade burning along at a thousand watts but at a crazy low efficiency of like 7% due to high current winding losses that comes from high torque output. A geared middrive could run at like 70+% efficiency and outperform it for that 30% grade but the hub could be faster. It really depends on the core losses vs winding losses at a given ratio. Geared hub wins for general use imo. Mountain fat biking, midrive all the way, and for speed or reliability and power handling go direct drive. Direct drive can make stupendous torque still, just with poor efficiency.

Thank you sir

Gravity doesn't exist

All I want is a bike that I can use off road when I go camping and making use of a trailer loaded with camping gear. I need a ebike that can go up hills with camping gear ....

My bike is 1000 watts and I dont care if that's illegal.

Good gov limits power 250W what mechanical power on the ground? Electrical could be 2000W.

Thank you for this break down. I wish there was a better way to let us know what a safe wattage is for our bikes to hold at.

So if the electric scooter is a dual motor does that mean i multiple my = by 2?

This is a very helpful video, Thank you!

Question, I have a Heybike 500w (48v 12.5 amp battery) Heybike states that my Mars Ebike has a peak power of 1000w and yet when calculating the figures I get 720 watts (a 15 amp controller x 48v=720w) not 1000w? How is this possible? Is Heybike overstating their specs.? The stated torgue rating is 50-60Nm.

Dude,, you need to re-think this watt, power, torque legal set of variables out with a little more finesse in the future. You lack clarity, content and charisma my friend, bottom of the class I'm afraid,

How to calculate the continuos power rating and peak power rating of any motor?

sincere gratitude for sharing knowledge here as well as publishing your books. If fortune shines upon me and I am bequethed one of them, I wll buy the other 2.

Great vid!

Video help me understand a little bit better anyhow the power ratings on e-bikes still confuses me a little bit though

🇺🇸 Really ask your own self Has any politicians in America ever told any real lie 🇺🇸

🇺🇸 US Politicians in the United States 🇺🇸Really has to feel their personal bank accounts somehow That's why the United States is always passing totally insane crazy law's all a cross the United State's 🇺🇸 It's America 🇺🇸

Trying to find my peak power of continuous what you say makes a lot of sense which I always thought I should just get a bigger motor then change the controller in the battery but instead I get to enjoy because I took the limit off. I still have pedal assist I have a 36 V. 20ah battery 🔋 hooked up so that I cannot have longevity out there. That’s my most pet right now. I do love speed, but that’s not the important part right here speed speed will.come it’s just First. I like to learn the bike. Learn what I can do with it then I’ll worry about the speeds and I love speed. I love to go fast, but I like to live after 30 miles an hour. It gets sketchy going down the hill big hill I could reach speed 30 to 35 miles an hour, it’s scary and sketchy and that is going down the hill😮

Thank you for your information great content I have a Jetson electrical bike. It is safe to have a 350 W motor running on a 36 V system and it’s at 15.5 as the speed max speed which I believe is impossible I can get this thing to go greater speeds but the fastest that I would get this thing to go would be 30 that’s it. Jetson is not built to go past 30 miles an hour. It’s a small bike to travel.

I would like to win your do it yourself ebike book i have an ebike and can't afford to have someone fix it when it break's ebiking is fun.

Great info.....

What about matching Batteries with controllers regarding Amperage?

The battery continuous Amperage should always be higher than controller continuous Amperage rating?

hi, i have a motor with 60v1500w, is the power rating input or output power? thankd

Simply put.
Controller should not exceed
battery output.

Love your channel. Awesone explanations.
So look at these stats and tell me if Im right...
Motor rated 750 watts.
Peak 1000 watts.
Battery

48V 20AH (960 WH) lithium battery

Controller

48V, 25 ± 1A; 12MOS

Am I correct to assume that the controller at 25 plus or minus makes up the difference between continuous and "peak" with the +5 amps beimg pumped into the motor to produce the extra peak 250 watts which ultimately overheats (at duration).
If I'm correct, I see why manufacturers are tweeking out another 5 amp controller over 20 amp battery in those (required) situations. Also, ambiemt temperature plays a crucial role.

why torque gets so much attention? you can anyway use a gearbox and increase your torque as much as you wish (unless you do with wheelhub motor) . I'd be more interested in efficiency of a motor in various working conditions

Does it matter if you run a motor at a higher voltage than intended though? Aside from cooling the total power I can't see any reason a simple electric motor would mind more voltage - within reason obviously. All the sensitive electronics are in the controller as far as I understand. In the extreme the engine parts might not tolerate the extra physical strain of more torque, but I doubt that 250w and 750w notors are much different in physical construction. I'd love the input of an experienced builder here. This is not advice - just a hypothetical based on my understanding of simple electric motors.

Why or rather how can Bafang on three motors in the 500 series namely the G 060 at 250/350/ 500 watts all have the same specifications including torque of 80nm regardless of the rated watts ?

So does the voltage matter as far as the motor is self say can I put a 74v battery and a 80am controller on say a 500w motor to make it run 60mph

Continuously usable power? Root mean square.

There is this governmental obsession with the 25x number. 250w, 250g, 25km/h...
Edit: After quite a few years and quite a few kilometers on my quite illegal DIYs, I have come to the surprising conclusion that I actually average between 250w and 200w on the long and steep commutes I do. And my DIYs push peaks, and push them hard, in the four digit realm...
Only offroading bumps the averages.
Therefore... my quite illegal bikes don't stand out a bit from the very legal ones. I ride with legal buddies and we keep the same pace, climb the same hills...
Except for milage. The batteries are about double the capacity of what I see on the high shelves in bike stores. 😅

Excellent information, I’ve been using the torque number and 750 W as my comparison point since my neighborhood is hilly. My driveway has 7+ feet rise of elevation 😂

Wow brilliantly explained, thank you.

In other words, this video is gonna help with my 3 to 5 motor plus 1 small to zero battery pack build or put an end to it, picture this...

I live in America. We only fuck with real numbers.

Thanks

Is the torque NM lie? Do some add the supposed human torque to the motor torque, or do they give only the motor torque?

Now how many advertisements of EBikes have you seen with anything other than a "watts" rating, not mentioning any qualification, like peak or continuous? In fact, have you ever seen in the specs of an eBike for sale anything other than just "watts"? And don't the laws all just say "watts" without any other qualification? I doubt seriously that any EBike motor is anything like 90% efficient. So when a seller says, "Watt," you may reply, "What?" Seems to me that PEAK power is when you start the motor, acting like close to a dead short circuit before it starts turning.

Watts/power. If a motor runs at 500 Watts, for example, some of those watts are heat watts & some are mechanical energy. If a 500 Watt motor turned 499 of those watts into mechanical energy & only 1 watt into heat energy, it should not overheat. So a rating of how many watts a motor can run at continually without overheating would depend upon the efficiency of the motor.

I raised my tire size and now I go 32 mph on a 500 watt back motor. Am I going to burn this thing up? Thanks.

The US federal definition was written by a Phd Electrical Engineer (Malcolm Currie) so it makes perfect sense if you think in electrical terms and realize he was trying to get the purview of ebike awary from the NHTSA to the CPSC with as much performance as possible. The NHTSA made it clear that anything under motor power alone could not exceed 20mph, so if you read the specification with that in mind he set the power limit at was would sustain a 170lb rider at 20mph on a level surface such that that much power can continue above 20mph so the rider input power provides extra speed. This is exactly how a bike power limit should be written. The power under 20mph is not limited because the 750W stated is a motor power "rating' which is nebulous.

i hope this video is redone to correct it's technical errors.

I see how it works if you can get the government out of our business we can have more accurate readings

Great video! Very helpful! 😊

If we need license, they better make a bike that could go past 60 and could go for because we will have a license and legally be able to go fast

what 4 batteries do I need for controller 48v 17ah?

Very well explained, thank you Sir. Question/s how/where do find the controller max output? where do you find the motor's true continuous output? Could you find out from the components cereal number?

great info!

Wat gebeurt er als je een 750 controller hebt en je hubmoter 250 ??