1. ## A few questions about the ESC, motor and LiPo...

I have a few questions, so I will number them.

Question 1.
If you have a 500W motor (as an example) and you use a 2S 5000mAh 25C LiPo.
This LiPo will give 5A x 25C x 7,4V = 925W
What will happen now? Will the ESC top the power off to 500W?

Question 2.
How do you determine what ESC is best to use?

Question 3.
If a motor can have 500W (same example) and the manufacture says that you can use a 3S LiPo with a 60A or 80A ESC... Does that mean that the ESC sends 60A x 11,1V = 666A to the motor?
Will the power be too high then or am I missing something here?

2. Thats not the way you calculate current. The Lipo will give you 5Ax25C=125A.

And amps x volt = ohm

1. Battery gives 125A. Motor will never draw more than 500W/7,2V=69,4A.

2. Look at the spec?

3. look answer 1, but divide with 11,1V.

4. Originally Posted by ronnyen
Thats not the way you calculate current. The Lipo will give you 5Ax25C=125A.

And amps x volt = ohm
Amps x volt = watt...

5. Originally Posted by Velineon
I have a few questions, so I will number them.

Question 1.
If you have a 500W motor (as an example) and you use a 2S 5000mAh 25C LiPo.
This LiPo will give 5A x 25C x 7,4V = 925W
What will happen now? Will the ESC top the power off to 500W?

The ESC has no control over what is being drawn in amperage or wattage. The only thing it can control is the pulse width which controls the rotational speed of the motor. The motor is what draws the amperage.

Question 2.
How do you determine what ESC is best to use?

By motor limitations plus 10-20% minimum. More if affordable.

Question 3.
If a motor can have 500W (same example) and the manufacture says that you can use a 3S LiPo with a 60A or 80A ESC... Does that mean that the ESC sends 60A x 11,1V = 666A to the motor?
Will the power be too high then or am I missing something here?

6. Originally Posted by Velineon
Amps x volt = watt...
Sorry, you are absolutely right.. nothing to see here, move along

7. Thanks for the help guys!
I will just move along.

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