My current setup is 4x 12v drills at 18v, each side (2 drills) being controlled by a 30a Electronize ESC. So far we have had no problems. Admittedly we have yet to do any hard tests, but we have felt no heat whatsoever thus far, and they have performed brilliantly considering due to a mishap or two we shorted them and once accidentally tried to charge batteries through them!

Should be fine.