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You could use some kind of buffer; another battery. There are already a few companies out there working on MW+ chargers. Mostly they are aimed at trucks and buses. But the technology is there.

The peak load is clearly not coming from the grid. One issue would be that that power is relatively expensive. Using that kind of is a last resort. Instead you'd want a lot of on site battery that can provide lots of power quickly and can soak up power from nearby solar panels, or cheap night time grid power. Easy to say because that is already how a lot of fast chargers work. If you operate these commercially, ensuring access to cheap power is key.

Also, just because people buy bigger batteries doesn't mean they actually drive more or use more kwh. It just means they can spread out their charging a bit more. Which means fast chargers would be something they would need to use less.

With a battery that large, you'd almost never run out as driving that kind of distance on a single day would be very rare for most people. And honestly the few times you actually do that, take some breaks.

This charging pattern is of course already the case for EVs with far smaller batteries. Most EV owners rely more on overnight slow charging than fast charging. With a battery that big you might get away with never having to use a fast charger at all.



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