You did not state whether the Inverter is a "stand-alone' unit or whether it is single unit acting as an Inverter or Converter as required. It sounds like your converter is still working because you have 12vdc House power when on SP or Genny. I would check the mainline fuse(s) between your House Batteries and the Converter, One probably blew when you overloaded your Inverter. Many converter have two outputs, one to the House DC Distribution panel (DC Fuse Panel) and the other to the Batteries. The converter, by itself, generally cannot provide the current required by your slide motors. The fuse(s) I am speaking to is generally a cartridge type fuse in line with the large Cable coming from the positive terminal of the House Battery(s).