Xantrex Fredom 458 series inverter/charger 20 amp

Dec 5th--original owners
1. today operated Onan generator--2. volt meter was + 110--3. then operated rig TV--4. Xantex inverter and solar panels installed Feb. 2004 5. model 81-2010-12-one circuit breaker on front-no command for battery type--we've replaced house batteries before and have not had a problem--5.inverter LED status, INVERT solid green, CHARGE blinking green, other two LED's off--Owner manual state that indicates inverting charger ready but no external AC available--