I'm going to have to get back to this.

Briefly: the imPower is a variable frequency pump -- driven by electronics -- that has only 3 speeds, and some rather odd behavior. This means, it will NOT do the sorts of things a full VFD pump will, but on the other hand, it doesn't cost a lot more than a electromechanical 2-speed motor.

One important point to consider: electronics and lightning don't mix well, as a rule. Florida has lots of lightning, and VFD pumps (including the imPower motor) have lots of electronics. Depending on your actual pump make, and your plumbing layout, a better option (more reliable and just as efficient) might be a electro-mechanical hi-E 2-speed motor, with a electro-mechanical timer. The imPower motor may be marginal in your situation, and the description of energy savings appears to make assumptions unlikely to apply to your situation.

(Generally, the electronic pumps seem to make energy savings claims that are based on a-typical circumstances, or else apples to oranges comparisons.)