3/22/2026 at 11:36:53 AM
The fundamental problem of high-wattage charges (say 500kW), isn't to deliver power from the charger to the car, but that there needs to be crazy amounts of grid capacity to support them.A house has like 10kW peak sustained power consumption (an apt even less), which it rarely reaches, so a park of these fast chargers need the same infrastructure as a small town.
These loads are so huge
Cities like Beijing have strong industry and in general have the infrastructure to it, so it's relatively straightforward to install chargers like these. If you go out into the countryside, this infrastructure disappears, and won't see these fast chargers.
Most European cities barely have enough capacity to cover urban expansion, never mind to support this.
These articles suggest, its just a matter of putting down these stations, and that would solve the charger problem, but in truth, there's often a prerequisite of huge grid upgrades somebody has to build and pay for, which come with the unpleasant sight of these high voltage lines intruding into neighborhoods.
I wished articles lambasting the lack of fast chargers also mentioned this as well.
by torginus
3/22/2026 at 1:00:11 PM
Sorry, but I think you're wrong on your concern: in China they specifically fix this issue with buffer batteries. From grid perspective, charging is no different than with regular, slow charging stations. You can still limit their capacity (as in cars that can be charged per 24h), the difference here is you can charge quickly.This is a good compromise for the time being while the grid catches up with demand.
by cromka
3/22/2026 at 1:38:07 PM
Batteries only help with peak loads, they also cost money and wear out. Let's do some math - a 10 car 500kW charger, with a ~30% occupancy, would draw a constant 1500kW from the grid, if we calculate 3kW average for a household(which is high), that would be the equivalent of 500 households.by torginus
3/22/2026 at 3:13:55 PM
I don't think this speculation is needed here, what I described is literally how these super fast BYD/Xiaomi own chargers work in China.by cromka
3/22/2026 at 5:04:30 PM
Same thing in the US. Tesla does exactly that at their supercharger sites. Probably not all of them, but definitely some of them.by l1tany11
3/22/2026 at 12:20:33 PM
In the Netherlands the energy network is undergoing a huge upgrade because of wind and solar- technologies nobody predicted in the 1970s.Things used to be simple: big power station makes energy and lines transport it to every home. Now you have vast wind farms far out on the North Sea and millions of buildings have solar panels. And to top it all off electricity replaces gas for heating and cooking.
We're gonna need bigger cables.
by expedition32
3/22/2026 at 3:32:53 PM
At least they're upgrading your network, over here in Australia they've realized (about 20 years after we became one of the biggest users of household solar) that too many people having solar makes the grid unstable and the load unreliable, so they want to start charging solar owners for feeding into the grid instead.by sevenseacat
3/22/2026 at 1:00:36 PM
Imo one of the biggest wins of renewables + battery is you can skip most of that infrastructure - you can have solar panels on your roof, on the edge of town, and you can skip most of expensive transmission infrastructure.by torginus
3/22/2026 at 12:15:33 PM
As an certified electrical engineer, this is certainly a problem. The main issue is of course how much copper is burried underground and how big transformer capacity is.The first solution is of course to try avoiding farst charging if possible by charging at home or at work over hours if possible. A faster charge will have to be a more expensive charge. Another solution that could ease things a little is to spread the load on the grid over time by drawing it from some local source (e.g. battery) Imagine a gas station has a beefy energy storage from which it draws the current in short blasts while the battery itself draws it much more spread out over hours.
This is essentially how it is done in much smaller scales (in terms of time, energy and actual physical size) on printed circuit boards using capacitors. If you'd draw the current all the way back from the power supply any bursty load would affect the voltage on the power supply and thus show up in other psrts of the circuit.
But in the end more electrical energy demand by mobility will lead to more electrical demand, period. And as you rightly pointed out that means more infrastructure, more copper in the ground, bigger transformers, more powerplants.
by atoav
3/22/2026 at 1:25:58 PM
Ah thanks for the expert opinion. I used to be an EE, but I've not been working in the field for a long timeForgive me, but afaik you can't really run truly high voltage AC lines underground - the main issues are electrical arcing and capacitive ground coupling, which leads to losses. HVDC has its own issues as well, mostly having to do with electrolysis, and it being crazy dangerous.
I mean, you can, but it's going to be very expensive.
By the way, have there been studies of what a 100% EV society's infrastructure look like, especially in countries without access to cheap and abundant renewables? I feel it's going to be quite a challenge, and would only make sense economically as part of a broader reindustrialization effor (which for the record, I support).
As for batteries, I think solar/wind require those anyway, and if a solar farm is backed by a huge battery bank, those can probably supply these ludicrous kWs these chargers would need, but transmission is going to be a challenge.
I would love to read something that would go in depth on how we would support a renewable based grid that also supports powerful fast chargers, as this I feel this needs to be a part of a society-level project, and I'm growing tired of these 'China's building better electric chargers!!!'-style alarmist articles.
by torginus