ECN Forum Forums General Topics of the Trade General Discussion Area Estimating KWH for a customer

If you are just estimating I would use a little more than 746w/hp. Remember you have to take into acount things like slip and motor efficiency. I have, from my experience, found that most motors are typically closer to a KW per HP.
Still, an amp clamp or some other direct measure of actual current draw is the only way you have to be close to accurate.