What is the difference between an ESC like this:https://hobbyking.com/en_us/hobbyking-red-brick-125a-esc-opto-version-11.html?___store=en_us
and one like this: diy-electric-skateboard-kits-parts/single-motor-120a-6s-esc/
Why is 1 more than double the cost of the other? They both can handle ~120 A and 6s voltage but to me(A noob) all I need is something that can control speed, work with 6s and handle 80A continuous.
Side question, is the electricity generated from the motors when going downhill or coasting a problem? The last thing I want is a battery fire or fried electronics mid-ride.
Side question #2, Is the white red and black cable coming from the ESC a pwm cable? might be obvious but not worth the risk of ending up with very expensive paperweights.