I would put back a smart mode converter with a POWER DISTRIBUTION for both 120VAC Breakers and 12VDC fuses.
I replaced my 30AMP ELIXIR after it burned up some connectors inside of it with a WFCO 8900 series Power Distribution panel and a WF8945 converter board. When I found out the WF 8945 board would never go into smart mode charging I installed a PD9260C stand alone controller. Just unplugged the WF-8945 controller unit to use for backup if needed.
I went from this to this in my OFF-ROAD POPUP trailer...
Now I got some nine working 120VAC Circuit breakers slots and eleven 12VDC Fuse slots and two REVERSE POLARITY slots on the power distribution panel.
The install was easy as all of the 120V wiring and 12VDC was already routed to the ELIXIR position. All of my wiring was ganged up behind the ELIXIR using large twist on connectors which is where my fire started from a loose connection. I had to enlarge the mounting hole where the ELIXIR was installed to fit the WFCO 8900 series
I selected the 60AMP controller to support my four each 12VDC Batteries I was installing. I would go at least 45AMPS just incase you install a second 12VDC soon or perhaps two 6VDC batteries in series to get the higher AHs you will need if you ever camp off the power grid with your trailer...
Just me yaking here...