I have purchased a 8400/6750 watt generator for the house. I've been to multiple electric supply houses/HD/Lowes and keep getting different answers. I know that my main panel is balanced (electrictian balanced it when I updated from 60 to 200amps a few years ago). There seems to be different opinions on safety and whether the Interlock meets the NEC 2017 (in Mass). I like the ease of the Interlock but don't want to kill a lineman.