Bonded or floating neutral in this scenario
Apologies in advance for the lengthy post, but I want to make sure I explain everything...
Home is under construction. Electrical rough-in is complete. Meter can and service entrance (SE) load center mounted on outside garage wall and a subpanel is on the inside garage wall. Meter has not been installed. Conductors are run from the meter can up the utility pole but are not connected to the transformer. SE load center is connected to two ground rods. Neutral is bonded to ground in the SE load center. Indoor subpanel has a floating neutral (2 hots, neutral, and ground conductors run from the SE load center to the subpanel). There's also a temporary service pole that provides power used for the build. It does not have any 240V receptacles, and I don't want to add one to that pole. The temporary service pole is on a different transformer (and utility pole) than the one that will ultimately power the home.
SE load center has an interlock kit, generator input box, and a double pole circuit breaker (to power the generator input box).
I want to use my Champion generator (#100520, 7000/8750 watts) to temporarily power my 1.5 hp water well pump (submersible) to pressure up the home's water tank and lines to check for leaks and make leaks easier to detect if one happens after the drywall is up. The generator will only be connected/used when the well tank needs additional water. The circuit breaker for the water well pump is in the subpanel inside the garage.
I've watched a few videos on when the neutral needs to be floating or bonded, and based on those videos, mine should have a floating neutral in this scenario, and no ground rod. However, when the videos show a floating neutral, they always assume that the house wiring is connected to the utility company's transformer (but mine is not).
Does the fact that my home is not yet connected to the grid change the requirement for floating vs bonded neutral, or should it still be floating?