OK-apparently some of you can't read and absorb what I said. I normally don't use the inverter except when not on shore power.
Today, when I took my readings (yes it's a good Fluke true RMS meter)to back up my memory of what has happened in the past I was hooked up to shore power and was getting Voltage from the converter. When I test, I test under load so converter went to 13.6 from 13.2. That just to clarify
When input volts are low, output AC will be low. Today to be sure, input was a strong reading, and one would expect inverter to put out proper 120v. I have another inverter hardwired that is OK.
My question is-is there an adjustable pot or something to bring this back to spec?