Yes, the Schneider Electric Conext SW inverter/charger is designed for off-grid, solar, backup, and hybrid applications. It supports AC coupled and DC coupled off-grid and grid-tie architectures.
No, you cannot sync a newer model Schneider Electric Conext SW inverter with an older model Xantrex Trace SW inverter. Your options would be to 1) upgrade the older Trace SW to a newer Conext SW or 2)