[Defitio]

Either you charge over night than you can charge slow and steady ( I did this at my parents house a few times with 800watts or so, which is not a lot) or at work where you already can have smart charging.

Independent of this, plenty of counties use energy to heat (consumes a lot) or have ac which also pulls a lot.

Ev charging is estimated with 10% additional load on a power grid. That's doable.

Is it a challenge? Yes. In one place more than in another place