If you're not driving in an unsafe way to draw attention, you should never be stopped and questioned by any authorities. Even if stopped, most police would not know about Ohms law or how to measure it (if a volt meter was even available)

A 1,000 Watt motor could even have a 750W label.

To me the big benefit of the E-bike is when you reach an uphill, no sweat, and no slow-down. Plus accelerating away from a daydreaming car driver (oopsies! did I break your bike and crush your leg? I am SOOOOO sorry).