> the largest peak load is often an electric stove, which is regularly greater than 1,500 kW.

Does that change anything about what I said? This is specifically about "if you do have supplementary house batteries".

> Also, this idea that higher usage overlap with the sun being out is laughably wrong.

The reason we have the duck curve is that insolation and demand largely overlap (especially when we're talking about the worst case part of the summer), but then for part of the evening they really don't overlap.

The peak use is evening, but there's a significant ramp up when the sun rises and the whole day is much higher than night. https://ars.els-cdn.com/content/image/1-s2.0-S03062619173137... (This isn't the US but finding household graphs in particular is annoying, and most of the US has more summer heat than denmark)

Anyway evening is one of those bursts where you use the supplementary battery to handle the rest of the load. Even 10% of the car's capacity, 6kWh, could cover almost all use above 1500W.

Everything you describe is true only in some places, likely California. In much of the rest of the world, electricity demand peaks in the evening, when the sun is low in the sky and continues well into the evening, when the sun isn’t out. Notice how even the Wikipedia page about the duck curve lists mainly California. Even in Australia and the UK, daylight hours and electricity demand mostly do not overlap.

>> The peak use is evening

> In much of the rest of the world, electricity demand peaks in the evening

Huh?

And again my chart showing that the entire day has much higher use than at night, then an extra high peak in evening, was Denmark.