BYD Announces 5-Minute Charging, But the Grid Is the Bottleneck

BYD promises 5-minute charging: the grid falls short

Filling an 88 kWh battery in five minutes requires 1,000 kW of instantaneous power, equivalent to the peak load of 155 homes. BYD’s promise of 400 km of range while having a coffee is physically possible but logistically difficult. The question is no longer what the car can do, but who provides the current.

What is needed to charge in five minutes

The arithmetic is stubborn. A vehicle consuming 22 kWh per 100 km and offering 400 km of range needs 88 kWh in five minutes: 1,000 kWh per hour, or more than one megawatt of power. Roughly, 1 MVA equals about 2,500 amperes flowing through a cable, though some recall that chargers of this class work at 1,000 volts and 1,000 amperes, requiring liquid cooling to reduce cable section without overheating the copper. Some even translate the joke into domestic units: an electric car consuming 15 kWh per 100 km "weighs" 540 newtons, the force exerted by a 55-kilogram mass. An average petrol car is about 200 kilograms. Energy moves fast or not at all.

The 155-space garage that blows the substation

Here appears the deciding concept not found in brochures: the simultaneity coefficient. According to the calculation cited, a building with 155 homes and parking spaces does not have 775 kW contracted (155 times 5 kW). The distributor applies a formula—13.5 kW for the first, 0.5 kW for each subsequent one—and the result is around 81 kW. That is, ten times less than the paper total.

Imagine now that the 155 cars are electric and drive 60 km daily: 1,860 kWh per day, or about 77.5 kW of average power. The math works as long as no one charges at the same time. No grid is sized for the theoretical maximum, and that is the knot: those who argue the infrastructure holds rely on staggered nighttime charging; while some joke about a 247-liter-per-hour backup generator that, in five minutes of charging, would consume 20.5 liters to move a car boasting it burns nothing.

Fast charging is expensive and streets lack sockets

The most repeated point is not technological, but domestic. Some argue that nearly half of cars sleep on the street and about 70% of the population lives in flats, so cheap overnight charging is not accessible to everyone. With fast-charging tariffs, the savings compared to petrol narrow; with a garage socket, the electric car is unbeatable. Everything else, they say, is window dressing.

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Shenzhen as a laboratory: 1.2 million electric cars

According to one participant, the Chinese city of 12 million inhabitants has already surpassed 1.2 million electric cars, more than 70% of the fleet, with electrified taxis, buses, and motorcycles. There, the power sequence has accelerated, according to his account: in September, 480 kW chargers peine, then 640 kW, and BYD’s announcement sets the bar at 1,000 kW, with 1.2 MW looming. The company mentions 500 operational units by early April and 4,000 in total. The announced rollout is Chinese; whether it lands here is another matter.

Tariffs, suspicions, and the brand’s narrative

According to what is stated in the thread, Spain’s fast network consists of 250 kW superchargers and a majority of 50 or 100 kW points, with newer Ionity stations as the exception. With that baseline, BYD’s five-minute promise reads like advertising: some call it Chinese propaganda, others recall the manufacturer pays for the doors it opens. This same distrust spills over to testing channels, attributed with commercial enthusiasm hard to explain in a market with few critical voices. Meanwhile, in the debate, it is assumed that the European Union is preparing tariffs in the name of climate emergency and fair competition, and on the table remains an uncomfortable fact: 60,000 MW have been rejected due to lack of grid capacity in a country debating shutting down power plants.

Technically, charging a car at one megawatt is possible. Commercially, it is a promise with a date. And electrically, it depends on an infrastructure nobody has taught yet.

If the car charges in five minutes and the grid does not know how to deliver a megawatt per socket, what is the race for? How many of these chargers must we see operating before believing the figure?