Chuck,

For others contemplating changing out Trace 4024 inverters, there is no reason you can't use single AC in/out inverters. It simply requires front ending the inverters with a transfer switch.

If you want dual AC in/out units your choices are limited. Victron (personal choice) or Magnum Hybrids (the units I have).

Just know that the Trace 4024 doesn't have a replacement with the same capabilities. The AC surge current of the Trace unit is unmatched by today's offerings.