Hi Dirtturner. I don't know when AS upgraded the converters but my 88 Excella has the older univolt. My manual states that the univolt should not be operated without a battery installed. Not that it would damage the univold but the higher voltage outputted by the univolt used without a battery could damage other thinge like radios and pc bds in the furnace, refer or water heater. The battery is what helps keep the voltage somewhat regulated.
Of course if these things are not in operation, or disconnected then its a mute point.
Originally Posted by dirtturner
Could you tell me what year the newer univolt units were installed in the AS. We have a 87 excella an are leaving the batteries in and pluged in for the winter, are there some things we should be doing.