[solardev]

I don't think it's solely a matter of getting more electric cars connected. Basically it's a mismatch between production and consumption by time (peak vs base loads) and so storage (whether electric cars or otherwise, like home storage solutions) acts as kinda a buffer. But so would utility scale storage (pumped hydro, giant battery farms), demand time shifting (smart water heaters, HVAC, dryers, etc.) or fossil fuel/hydro peaker plants.

But a big part of it isn't just the engineering but the human and consumer psychology. You can build all the infra, but convincing households to abide by your time of use schedule is challenging unless you force them into it (which many utilities do). People want to use their stuff whenever they want, not when it's most efficient for the grid.

That's where the storage is nice, letting the utility manage those fluctuations, but we can't produce enough battery capacity at a good cost right now. And there's geopolitics too, China controls a lot of the raw materials, and production of the downstream products are often limited by the Japanese and Korean battery manufacturers.

It's a multi faceted problem, not just something we can throw an infinite amount of EVs at.