When in inverter mode the AC-1-Out voltage is only 120V, it should be 230V.
This has just started happening with no trigger event that I can identify. It has worked without problem for two years. It had been connected to shorepower in Charger Only mode and no use for about 3 weeks.
Pass through from shorepower and the generator works fine on both AC-1-Out and AC-2-Out.
The batteries supplying 24V DC to the Quattro are fully charged. There is no solar involved.
I can't see any configuration options that even permit the inverter to be set to output 120V. I have not modified any configuration options
Any ideas on the possible source of the problem or things I should check are very welcome.