It's moving power requirement from industrial scale to commercial scale, not even large commercial. See BYD partnering with 10000s of PRC KFCs, if the grid can support KFCs it can support flash charge, which makes it more or less ubiquitous anywhere with reliable grid.

The modularization + battery is what makes variable scaling feasible, do not even need full 1500 kWh + 600kW grid power depending on throughput, that's based on max utilization parity with gas pumps, most systems can be smaller. System is also inherently variable mix match grid draw and battery % according to need. i.e. 500kHw battery storage and 300kWh draw for low utility areas. More battery for high utility area which going to have good grid anyway (at least in PRC). The scaling is easy because as mentioned in another comment, the system is almost drop in, commercial HVAC / applicate installation.

AND because it's functionally drop in, low footprint, there is no minimal # of piles, you can spread 1-2 piles in any lot with a couple spots to spare because you don't have high fixed capex of digging a big ass underground oil tank or permitting / earthworks for charging hub with many piles. The system scales to smallest possible increment, ~1-2 parking spots for pile charger + recycled battery. Everything on paper makes this stack MORE economical and easier to proliferate in more spatial configurations than gas / hub charging infra assuming there is grid. i.e. this won't work in off grid stations.

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close04 2 days ago | parent [-]

I'm sorry to say it but a lot of your assumptions are not accurate. Nothing is impossible but it's a lot harder than your assumptions make it look.

> if the grid can support KFCs it can support flash charge

A large KFC probably peaks at 200kW. Stoves, HVAC, lighting. A single flash charging stall could power 10 average KFCs. I hope this puts things in context.

> See BYD partnering with 10000s of PRC KFCs

BYD said they'll build 4000 charging stations [0]. China can pull it off because they can afford to "stick to the plan" no matter what and because they're able to manufacture the necessary grid components to keep up [1]. Can many other countries?

> do not even need full 1500 kWh + 600kW grid power depending on throughput

You keep doing the math that ignores one term: per stall. You either have the capacity to flash charge at every stall, or you don't and you have to find excuses for your customer and move the goalposts in this conversation. If you want to guarantee that capacity then you need no less than 1MW/stall. How you supply it doesn't matter but grid+battery have to supply it. No matter how you mix and match and balance, you'll need to install one and upgrade the other.

> the system is almost drop in, commercial HVAC / applicate installation.

Except you don't replace an existing installation, you add something that needs 10+ times the electrical capacity of everything else put together. That increase needs to be accounted for somewhere.

> you can spread 1-2 piles in any lot with a couple spots to spare because you don't have high fixed capex of digging a big ass underground oil tank or permitting / earthworks for charging hub with many piles.

You literally have to do all that work but for the grid, transformers, panels. KFCs aren't built with 2MW overhead just in case.

[0] https://www.byd.com/mea/news-list/byd-unveils-super-e-platfo...

[1] https://news.ycombinator.com/item?id=47604887

	▲	maxglute 8 hours ago \| parent [-]
		You're only assuming max utility installation, yes would have to do grid upgrade to sustain continuous utilization in those scenarios. I highlight 1500+600+ all flash/blade2 10m throughput to show system is parity with most heavy utility gas model. But for many installations, 100-200kwh grid + 1500kwh battery peak shaving enough to decouple from grid / not require immediate grid upgrade. 1500kwh storage + whatever commercial local grid plugin (i.e. 100-200kW drip) with battery peak will suffice in many current market scenarios. Have to factor in actually blade2 adoption timeline and charging habit etc, i.e. 1500kwh+100kwh/200kwh = 4000-6000kwh which is enough for 40-100 cars (not all going from 0-100, avg ~50-60kwh topup charge). For most markets this is gas pump speed for blade2s + flash, or ubiquitous charging without major grid overhaul for legacy. Will take years for blade2 saturation so that is years of infra/leadtime buffer, or alternatively just slap more piles + battery to simply reduce grid contribution, but under CURRENT market conditions, this is drop in installation for immediate value, with multi year lead time to upgrade grid if required. THE MARKET REALITY for years is 2x1MW/stall all the time is going to be edge case, and something software (i.e. PRC already have energy rate arbitrage queueing) will have to address as they become more common / battery buffer cannot keep up with. Until then the important infra consideration is installation is 100-200kwh spread over multiple likely preexisting commercial level transformers (which is months leadtime hack vs years utility for less infra competent regions). Napkin math is ~10 (i.e. 20 hoses) of these will match typical western neighbourhood gas station throughput. This not considering markets where home/residential BESS will shift even more charging to night curve, i.e. we should expect less 0-97 behavior and more topup demand. Yes execution difference is PRC transformer / utility lead times is in months to hook up the full 600kWh+, but for everyone else the system allows them to hedge with battery in lieu of immediate utility scale grid upgrades. The battery buffer realistically defers major upgrades to enable installation now, because even if upgrade required, it would be commercial vs utility scale in terms of paperwork and leadtime. When I bring up KFC, I'm not saying they're using KFC power, I'm emphasising system works on commercial level power hookup not utility level, i.e. commercial power during night/lulls + battery peak shaving + small spatial requirements + drop in WITHOUT upgrade opens up much more micro charging sites, instead of a charge hub with utility hookup, can spread piles over dozen restaurants with local grid without major upgrades for years until blade2 or more hungry packs reaches saturation. KFC doesn't need 2MW to spare, the immediate commercial grid just needs 100-200kwh to spare, i.e. enough spare capacity for another walk in freezer, most commercial sites have that overhead and battery peak shaves / recharges / balance typically synergize with with business activity.