[millebe]

Your choices are either:

- Install this equipment in a permanent manner consistent with its listings and all applicable codes. "Off-grid" does not mean "do whatever you want", it means you aren't connected to a fixed grid.

- Buy equipment that is designed (and listed) for portable PV storage. This would most commonly be used for RVs and the like, and would look more like a generator than a house panel. You still don't get to drape extension cords all over your home in lieu of permanent wiring if you do this.

- Start a company, design a product that can allow temporary whole-circuit backups without transfer switches and all the usual stuff, and somehow convince a NRTL to list it. Good luck.