Re: 350kW!!!!
Transformers up in the air are a prime source of fireworks in the evening. They'd also likely be illegal under the current regs.
Not a problem, simply change the regs. It'd also allow pre-industrial levels of fire detection to accompany power generation. So we'd have windmills and fire beacons! Just needs re-introduction of fire wardens to keep an eye out for ol'Sparky.
But it's going to be a problem. Even if consumers try to rely on plain'ol 13A charging, it'll still require upgrades to the electricity distribution networks which are space constrained by plots available to place substations & transformers. Especially when domestic heating is decarbonised, and there'd be the challenge of charging cars, cooking, heating and people running power-showers, possibly simultaneously. I guess wealthier neighbourhoods might brown-out first if sufficient numbers decide to buy EVs and 3-phase feeds so they can fast-charge at home.