You would only need the one device per household
Do you even begin to understand how *much* money there is in that, tens of millions of homes, hundreds of millions of cars. The first person to bring this to market will make Bill Gates look like a pauper.
But forget that, the first country to develop and harness it will be literally strategically untouchable, their energy production capacity will eclipse the rest of the globe, by orders of magnitude, it'll make the power gap that Great Britain enjoyed in the 19th century by being the first to mass utilise steam look like a geo-strategic joke.
Seriously, the very fact this device is not in every ship, every tank, every aircraft and ESPECIALLY transport vehicle in the US military inventory is a huge clue that it does not exist.
Consider that the power generation capabilities are such that the fact that every power plant in the US has not already been retro fitted with this technology, would have to considered the greatest strategic blunder in the history of the world.
Are you honestly suggesting that the industrial-military complex of the US is not *that* interested in world hegemony? Because power generation is the very driving force behind military domination. The country that has the most power generation has the ability to construct the best logistics systems, and its logistics that wins wars, not fancy weapons.
I kinda get from your 9-11 comment, that you like, and are kinda into conspiracy theories though, so I can see why you find things like ZPE compelling.
But the very evidence that ZPE is not is widespread military and industrial use, is a massive tell that even if it is possible to extract work from the quantum ground state, no one knows how to do it in a manner that's any better than any existing technology.
Finally suggesting that classical physicists are not interested in researching it, even working on how to extract energy, is laughably wrong, Dr Sonny White at the Nasa Eagleworks labs, for example, is very interested in looking into zero state drive devices (EM-Drive) though the results of his tests have been disappointing, and any actual results from the EMDrive may also be a side effect of the proposed hypothetical Woodwood effect (itself a contentious area of research)
And YES I am very aware there is research into the potential for ZPE being an energy source, going on around the world, as it's a low probability/high reward area of research, much in the same way inertial confinement fusion research is. As the first nation to crack it gets a massive boost on the geopolitical/geostrategic stage, and no serious country is going to ignore that possibility.
Right now the state of research is, "we can't any more work from it than we put in", just like inertial confinement is at the "cusp losses mean its unlikely to work" or EM-Drives is "its probably mass shifting on the balance due to thermal expansion" or the Woodwood effect is "probably coupling with the balance device"
So I'd suggest if you want to convince anyone here of any potential of power from ZPE, you really should look more into the respectable work being done in the field and quote that, and stay away from quoting the nutters.