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240 in the neighborhood - i.e., that’s enough to distribute from the pole to a few houses. Of course you have higher voltages to go longer distances. This is equally true for AC vs DC. Thus, the idea that it takes a looot of copper for DC is erroneous.
In fact, where conductor size is relevant is that you can use smaller conductors for DC, because of the skin effect.
Wiring: Split phase, that is also usable as 240 for large appliances. So, the latter.
Yes, it’s easy. BUT: