Thanks for the explanation.

Shouldn't they be selling pumps based on how much they will cost to operate - IE - consumption in KW/h? We all pay for watts, so it would make more sense to get electrical input and energy factor or a total pump power efficiency curve since wattage varies with the the amount of head.

It makes NO sense that people walk into a store and 5 different 1hp pumps will have 5 different actual input watts ranging from 746 to 2000+

This rating difference can mean $500+/yr in actual operation costs.