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Motor Voltage Limit with Vesc

Hi, I have a 4260 Alien Motor, That suport Max 6s Batteries, but everywhere I read I see someone saying To use 12s with Vesc, Wouldn’t It burn my motor?
And this 300kv motor can handle my weight? I’m like 55 Kg

The ERPM limit stops u from using 260kv or 300kv motors with anything over 6s. It’ll burn up the VESC.

Oh, cool, do you think 300kv can handle my Weight?

I don’t think 300kv will give u much torque, you will definitely have to kick off. Maybe dual 300kv, but even then I don’t know. I have a board with dual 280kv and it’s fun but I have to kick a lot, especially up hill.

Lol, so just Kv matters in a Skateboard motor? Because mine have like 1500w, like an Dual Boosted Board

I’m just giving u my experience. I like 190kv on 10s and 260 on 6s, lots of torque and high speed. Speed without torque mens a lot of pushing.

I wouldn’t use 300kv, doesn’t mean you ‘cant’, just means it’s a waste of money if you end up having to upgrade to increase performance.

There’s some dispute to whether lower kv means more torque


https://www.rcgroups.com/forums/showthread.php?1096719-Mythbusters-Lower-KV-more-torque

I think it’s more likely the size of the motor that matters (but higher kv motors are usually smaller anyway)

the power rating will matter as it will limit the max motor current for your system voltage (and torque is proportional to motor current

your motor seems a bit small compared to what most people are using, i’m using an alien 6374 240kv 10S and weigh 80kg it has enough torque to get me up pretty steep hills

Yes, I think I’ll Buy Another One, but you know, they are not cheap, especially for me that in Brazil one Dólar is like 4 Reais (Brasil Money)… I between Sk3 and Enertion Ones

I have a 270kv motor on 12s, it does work. But I have 4:1 gears which makes the wheel pulley huge it will only fit 97mm wheels. Even then it’s close to the ground. You have to set ERPM max to 60k though.

I have heaps of tourqe. But I would prefer lower KV and smaller wheel pulley.

Motors are limited by amps not voltage, overheating is the thing to watch out for.

1 Like

I use 4260 Alien Motor (300KV) and I’m about 55KG in weight. I use 2x ZIPPY Flightmax 3000mAh 3S1P 20C to make a 6S pack. And for my weight it has a fair amount of torque and top speed around 18mph

Oh 'Man, Thats is really great. Do you use Vesc? And tell, It can go fast?

Not yet, I’m using some cheap RC ESC.

It goes pretty fast for me 18MPH (28KPH) - I think my weight helps a lot

Yeah, I’m 50Kg too

What about 12s? Im running 2 6s 5000mah lipo at 40c and cant decide what motor. the 190kv or 240kv or in between

I think the max you can run on 12s is 190KV. I may be wrong about that, but as I understand it…

8600 / MAX Voltage = MAX KV so in your case 8600 / 44.4 = 193.69KV

Let some people here that are better versed in VESC math and configs double check that.

What is 8600 mean?

So on the motor specs where it says voltage your batter has to match that?

for example


says 10-12s

2 of these


would be 12 s

Would it just be safer for me to use 10s setup?

To find your Max KV use the following formula
8600 / MAX Voltage = MAX KV

8600 = Max RPM
To find the Max RPM use the following formula
Max Voltage * KV = RPM
In your case…
44.4v * 193.69kv = 8599.836 RPM > rounded up = 8600

Another way to look at it is Max Voltage
8600 / Motor KV = Max Voltage
In your case…
8600 / 192kv = 44.79v

So assume you were going to use a 240 KV motor, using the formula above…
8600 / 240 kV = 35.83
So the Max Voltage for a 240kv motor is 10s or 37v

I am too scared to use 12s, the tolerances are too tight, and I don’t think there’s much of a performance boost…at least not for how I ride. If you want to be really safe, use a 6s battery pack. If you want to be pretty safe and leave yourself some room use a 10s battery pack.

The VESC should be limited to 60k erpm or you might blow it. This is the rpm * pair of poles in your motor. Most motors have 14 poles (7 pole pairs)

That’s why your RPM limit is ~8600

Hi People
Whats best motor Turnigy SK3 62mm 192kv 12s or 240kv 10s?

Depends, one you have more torque and other more speed, but just one works with 10s and Vesc, the 192 one, because there is a erpm limit… Read More