One of the biggest concerns when buying an electric car is the loading times. That is why in recent times it is one of the points in which the most attempts are being made to advance. While solid-state batteries arrive, which promise to increase autonomy and reduce charging times, there are people who are asking quite peculiar questions. For example, how long would it take to charge an electric car on a USB socketwhich logically has much lower power than other systems.
We are used to seeing charging powers of 150 kW in direct current, even more in some vehicles. When we talk about alternating current, up to 22 kW is already being reached thanks to the Wallboxes, although this depends on whether a three-phase charge is carried out or it remains single-phase. Although this is also influenced by the type of cable used and if there is one that has a USB socket directly to the car, the times they would be very exaggerated. That possibility does not exist, but let’s consider what it would be like.
We are talking about that currently a normal USB socket reaches a 2.5W maximum power, which at the time made sense for small devices. With the new standard USB-C reaches up to 240 W on some devices thanks to the latest updates. Taking into account that this would be equivalent to 0.0025 kW in the case of USB-A and 0.24 W for USB-C, we are going to analyze how long it would take to complete a recharge in some of the most popular electric devices.
If we start with what was one of the first electric For the general public, we would have to name the first Nissan Leaf. With its 24 kWh battery, the truth is that it did not achieve very significant autonomy, but at the time it did. Charging it with a normal USB would take us 400 days, more than a year and a month. With a USB-C socket it would charge in four days and four hours. In a current model with a higher battery level, such as the Kia e-Niro, it would take about three years to recharge its 64.8 kWh battery with a USB-A and about twelve days to do so with USB-C.
And there are still much larger batteries on the market. For an electric supercar like the Rimac Nevera, which has a 120 kWh battery, the times are doubled. We would be talking about almost five and a half years in a full recharge with the basic USB and almost three weeks with a USB-C. And the figures that stand out the most would be those of charging a beast like the GMC Hummer EV and its tremendous 246 kWh battery. Twelve and a half years to charge it with a USB cable would take an eternity…