Sorry I'm late to the party. That inverter is not really setup for home backup. It would need something to recharge the batteries and a transfer switch. And it is not UL tested/approved.
You'd be better off with a Samlex system. They included the internal transfer switch.
https://samlexamerica.com/products/120-240v-split-phase-inverter-charger-48v-4200-watt-evo-4248sp/
Or an Outback system - GS8048A
https://www.outbackpower.com/products/inverter-chargers/radian-series
Or a Sol-Ark system. This is the one to buy because it integrates solar charge controllers if you plan to use solar as well.
https://www.sol-ark.com/products/
Any of these systems will allow you to integrate a generator along with the battery system.