I like this potential enhancement. I’ve been trying to do the same thing for comparison between my Sense and my Ecobee, especially for my upstairs AC unit that runs the most frequently. I’m doing the reverse - summing up my Ecobee hourly cooling runtime, then multiplying by the rough power consumption of my compressor (2500W) so I can compare “usage”. I found that Sense does indeed “lose” detections for multi-hour compressor runs. Some of these “dropped detections” might be do to misreading an off-signature from my downstairs compressor turning off, though it’s hard to diagnose exactly.