there are a lot of settings with the inverter the manual says
NOTE:The battery voltage can increase above the float voltage when using an external charging device such as PV arrays, wind turbines, and micro-hydro generators. Be sure to include appropriate charge management equipment with all external DC sources
are you shutting down the solar charging when using the xantrex to do the charging.
these settings will change the charging also
The Freedom SW transitions to the float stage if either one of the following two conditions are met:1.The charge current allowed by the batteries falls below the exit current threshold, which is equal to 2% of the programmed battery capacity (for a 500 amp-hour battery bank, this would be 10 amps), for three minutes.2.The Freedom SW has been in absorption for the programmed maximum absorption time limit. The default is 3 hours, but the time limit is programmable from 1 minute to 8 hours
