Ed_Gee wrote:
To repeat some info - the frequency error occurred at three different RV Parks... all in the eastern Oregon area... I have yet to determine if my DVM measures Frequency.... but I must consider the EMS may have a problem.
I would concur that your EMS is most likely at fault if it is failing on frequency on shore power from the PoCo.
If EMS is faulting over a less than +(-) 2Hz change from PoCo then it must be the EMS.
If it was faulting from your gen only then the issue most likely would be coming from the gen in the form of gen over or under RPM.
EMS systems do fail.. Sometimes they get fussy.
Heck I have a UPS unit that gets bent out of shape when running from my genny and the genny is under light load and constantly switches between UPS battery and shore power unless I add a couple of amps of load to the gen to drop the frequency slightly.. UPS units must synchronize between the shore power and the inverter in order to switch to battery or from battery so they are sometimes persnickety on frequency.
