After receiving some commentary on another forum I decided to revisit this post. I've added some AC current measurements (using a Fluke 8060A) and corrected a couple of things:
1) My original table showed the I2 KPL (beta unit) having a PF of .82 as measured by the Kill A Watt. This measurement was actually performed using a UPM100. The power factor presented was based on the UPM real vs apparent power - I no longer trust this device. The table has been updated with measurements using the Kill A Watt - Current, apparent power, and real power are below the resolution of is "instant" display.
2) I had previously shown a power factor of 1.0 for the V5.X devices. This was the result of the apparent/real power being below the device resolution and was misleading. I have changed those values to "_" in the table.
3) I've added the Fluke current measurements and calculated VA numbers to the bottom of the table. Since the Fluke cannot determine phase, we can only calculate Apparent power (not the real power that our utility meters register).
4) The last line is a calculated power factor based on the Fluke apparent power (VA) vs the kill-a-watt Real power.
1) The following is a comparative analysis. I do not have details on the Kill A watt to perform any type of measurement system error analysis.
2) The fluke current measurements and calculated Power Factor agree well with the Kill A Watt on the older devices (V1.2 KPL presented).
3) The Fluke confirms a significant (factor of 6) reduction in the current consumed by the V5.X devices. As stated above, the fluke cannot provide phase so actual real power is unknown.
4) The "long term" average power measurements provided by the Kill-A-Watt indicate a similar reduction in real power vs VA. While this may be a "leap of faith" based on the resolution and accuracy of the Kill-A-Watt, it is at least consistent.
5) My original chart indicated that the I2 KPL had a Power Factor near 1. This was a mistake that led me to believe that the PF had been improved on the new devices. This was further promoted by the Kill-A-Watt underanging on it's measurements and displaying a PF of 1. In fact, the Fluke measurement appears to indicate that the PF is similar to the original devices. While I'm not particularly happy about that (I hate distortion), a factor of 6 reduction in current trumps PF any day.