said by sk1939:said by garys_2k:It's not likely a noise in the line issue (which would be very, very small, this isn't an audio line) but related to how well the governor controls the generator's speed. Non-inverting generators' output frequency directly depends on the speed, and the speed often depends on the load and how quickly the governor reacts.
That, and some generators also do not hold a stable voltage. Also, if the inverter is not of a decent quality the UPS may not like the line noise the inverter generates (not line noise picked up from the wire). Cheap UPS's do not like cheap inverters and/or cheap generators any more than expensive UPS's like cheap inverters.
Thanks for the reply back but that was not case. Sometimes we over analyze things and the answer couldn't be any easier.
I have a 5500watt (running watts) B&S generator which uses
True sine wave "thus producing a cleaner power" as stated by B&S. Also I have a decent APC UPS so not really using junk. Today I resolved the issue by simply redoing my terminations. I placed the meter back on and tested at a few different outlets and HZ held @ 60 ~ 61 just like the Utility company, before it was unreadable. The voltages always been good, never thought to check Hz until after the storm, all is good again...