The 1-MW chargers have internal batteries, so they can pull a much lower average power from the electrical grid.

The connection to the electrical grid of a charging station is not dimensioned based on the charging times. It is dimensioned based on the number of cars that must be charged during a given time interval at that location (assuming a certain average charging energy).

So regardless if fast chargers or slow chargers are used, what matters is how many electric cars are used in a region and how much they travel each day.

Fast chargers can matter only indirectly, if their presence will convince more of the car users to switch to EVs, requiring the electrical power suppliers to take into account this increased consumption.

> 1MW of 500W solar panels is 2000 panels, for example.

Or conservatively 100m x 100m of panels. About 1/5 of the roof area of a big-box store.

I posted math in another comment, maybe wildly off. It's 1500 kWh of battery from 30 old blade1s / upcycled byd packs, + 600kWh of grid power (typical industrial i.e. no need for major grid changes) + 30 kWh of solar roof (i.e. minor contribution). Scaled for 3300kWh for 2-3 hour morning/afternoon rush, about 100kwH per car. 100-150 cars per day like typical gas pump. The key point is the battery storage with upcycled old batteries (i.e. 0 capex) is CHEAP and space efficient, and since storage basically free, they can simply stack more packs in future to grow buffer if required. Of course assuming long term proven safety, i.e. no laws mandating burial. Otherwise storage is couple parking spots big x 2m high. Can stack to 4-6m... but I think regulatory will probably prevent it from any higher. TLDR basically system scaled/designed to use typical grid power + size battery buffer + charging speed for gas station parity.

Hmm, "Never underestimate a shipping container sized battery hauling down a highway"?

I think flash charging infra math is:

1500 kWh battery storage + 600kW grid draw + 30kW solar canopy (if weather allows).

@10m per car across 2 cables = ~36 cars over 3 hour rush hour throughput (comparable to 2 gas pump) = need ~4000 kWh, 1500 kWh from battery 1800 kWh from grid = 3300 kWh. This worst case all cars 0-97% charge, realistically mixture so 3300 kWh should cover typical peak scenarios. Then midday lull for grid to refill batteries for evening rush, after again overnight charge from grid. Basically 1x2cable station can service 100-150 cars/day comparable to high-density gas pump.

In terms of physical size, battery storage smaller than gas in terms of physical infra = doesn't need to be underground (assuming long term blade safety ensured). Gas needs storage for multiple days / week so need to scale underground tank accordingly. 1500kWh scaled for rush hour = battery storage (recycled) realistically ~30 recycled blade1s slapped into racks, a couple parking spaces worth, and can be stacked vertically. It's much more space efficient (and cost efficient) than gas.

The already existing 1 MW chargers have internal batteries, so they do not need from the grid the peak power, but only the average power.

The average power is lower, as there are idle times between cars. Moreover, in the beginning only a few cars would be able to charge at 1 MW, so the average power will be even lower, allowing a later upgrade of the connection to the electrical grid, when fast-charging cars would become more frequent and when there would also be more EV owners, so that more cars would have to be charged per day.

My understanding from watching a video on this last night, the same Blade 2.0 cells going into the cars are going into the charging stations. And it just so happens that BYD is massively scaling the manufacturing of these.

1MW/800V architecture = 1250A