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It's completely illegal unless your home has a "transfer switch" (manual or automatic) installed for this purpose - and if you're plugged into the generator side of a transfer switch, then you can't charge the truck, only discharge it. There are probably modules designed for solar power that allow two-way transfer safely.

On the other hand there are no tricky rules for an electric truck to have extra power outlets in it.

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I'd expect a lot of people might just use extension cords and plug critical devices directly into the truck.
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Bingo. Unsurprisingly, the ford system is basically an off the shelf solar system minus the panels and with a very tiny battery to kickstart the system.
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Do cybertrucks work any differently?
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I believe they use the vehicle's onboard inverter rather than an external one.
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