I had a new 4 ton heat pump installed earlier this year. With 100A electric service and many hundreds of feet between my panel and the utility transformer, I could see a momentary flicker in incandescent lights when the compressor started. Also, my standby generator had a voltage/frequency sag when the AC started up, especially if any other large loads were running. To fix this, I added a hard start kit, since the new system didn’t have one from the factory. The power meter screenshots from below tell the story. It should be obvious which one is before and which one is after.
Unfortunately I deleted my HVAC device from Sense last week since it was underreporting usage, so I don’t know whether the kit would have broken detection for that old device. My guess is yes. Hopefully it will re-detect the system quickly.