Electric car: Big loss of charging at the household socket

Electric car: Big loss of charging at the household socket


When an electric car is being charged, electricity is always lost – but according to ADAC, the loss can be very small.

Not only are oil prices currently at declining levels – too Electricity prices have recently risen dramatically. Not only the drivers of combustion engines, but also the owners of mobile phones are currently paying more attention to high efficiency. However, one goes during the payment electric cars always wasting energy. Of Electricity is paid but it doesn’t stop at the battery. However, these payment losses can be kept within limits.

To keep charge loss low, ADAC recommends using a wall box. (icon image)

© Rupert Oberhäuser/Imago

Electric car: ADAC warns of a large charge loss in the household socket

ADAC has conducted an experiment with four electric vehicles: One Renault Zoe, Fiat 500e car, a Tesla Example 3 and one VW ID.3 was compared when charging in a household socket and in a wall box. The results were clear: when paying at the household outlet, there was a greater loss: a good 24 percent disappeared for the Renault Zoe, and 15.2 percent for the Tesla Model 3. And even for the VW ID.3 (13.6 percent) and the Fiat 500e (percent 12.7) one fell by the wayside.

Charging losses in electric vehicles: ADAC recommends the use of wall boxes

Things looked even better when charging at the wall box with 11 kWh: The loss was clearly reduced. For Renault Zoe it was “only” 9.7 percent, for Tesla 7.7 percent, for VW 9 percent and for Fiat 6.3 percent. According to the Automobile Club, one of the main causes of charge loss is the conversion of alternating current (from the outlet) into direct current (if the car’s batteries can store it) by the on-board charger. .

Effective losses also occur in the electrical system of a 12-volt car due to the number of control units that work during the charging process. Not negligible losses also occur, for example, if the cable in the socket is too long. Losses through the charging cables or the house distributor, on the other hand, are “low to negligible”.

Charging an electric car: These ten go farther in 20 minutes

Kia EV6: 309 km. Thanks to the modern 800-volt charging technology, the mid-range SUV from South Korea is at the top. The version with rear-wheel drive and a 77.4 kWh battery was the only model in the test field that broke the 300 km mark. Base price: 46,990 euros. © weigl.biz
Mercedes-Benz EQS 450+
Mercedes-Benz EQS 450+: 275 km. The luxury sedan for at least 107,326 euros benefits the most from the 400 volt technology used thanks to precise charging and temperature control. A long-term version with a 108 kWh battery and rear-wheel drive was tested. © Deniz Calagan/Mercedes-Benz AG
BMW iX
BMW iX: 273 km. The large electric SUV was tested in the luxury class category as xDrive50 with all-wheel drive as standard – and a powerful 105.2 kWh battery. The basic price of the powerful Stromer is 84,600 euros. © Uwe Fischer/BMW
Hyundai Ioniq 5
Hyundai Ioniq 5: 272 km. The South Korean SUV is technically related to the Kia EV6 test winner and uses the same 800 volt high-speed technology. The most economical rear-wheel drive version costs from 43,900 euros, the version with a 72.6 kW tested for an additional 4,000 euros. © Dino Eisele/Hyundai
Porsche Taycan GTS
Porsche Taycan: 271 km. In the top class, the test values ​​were almost identical. In the GTS version, the electric Porsche (base price 86,733 euros) with a 93.4 kWh battery is just behind the best in its class and can also charge with 800 volts. © Porsche AG
Audi e-tron GT quattro
Audi e-tron GT quattro: 237 km. The four-door, all-wheel-drive electric sports car is based on the Porsche Taycan and therefore also has 800-volt high-speed technology and a 93.4-kWh battery, but is slightly larger and more spacious. Price: from 104,000 euros. © Audi
BMW i4 eDrive40
BMW i4: 235 km. The electric version of the naturally aspirated 4 Series is the sportiest model in the mid-range category. Like the eDrive40, it costs from 59,200 euros and has a battery with a capacity of 83.9 kWh. ©BMW
Tesla model 3
Tesla Model 3: 221 kilometers. The electric car pioneer has always placed more value on range than fast charging, which is a conflict of goals when designing batteries. The long-range version with an 82.1 kWh battery was tested on the brand’s own superchargers. Base price of Model 3: 52,965 euros. ©Tesla
sorry 2 stars
Polestar 2: 218 km. The young brand belongs to the Chinese group Geely, cars are manufactured by a subsidiary of Volvo and produced in China. The Polestar is available from 46,495 euros, the long-wheel drive version with a 78 kWh battery was measured. © Polestar
BMW iX3
BMW iX3: 201 km. Another BMW based on the tried and tested model of replacing a combustion engine model with an electric car. The mid-size SUV costs from 67,300 euros and has a battery with a capacity of 80 kWh. ©BMW

Electric car: Faster charging reduces charge loss

So ADAC’s recommendation is to connect Stromer to a A wall box (which you can also build yourself with a little expertise) charge with 11 or 22 kW. Because with a higher charging power, the time of the charging process is reduced – and thus also the time during which charging losses can occur. According to the experiment, the charging hub had no effect on the loss: If the battery was charged by 20 or 50 percent it only caused a slight deviation.

And what are the disadvantages of charging at a public fast charging station? According to the car club, in this case the power conversion is not done through the car’s on-board charger, but in the DC charging station. Therefore, loading losses are not the responsibility of the person filling the tank, but the operators. This is also one of the reasons why fast charging is usually more expensive than drawing electricity from AC poles.

List of rubrics: © Rupert Oberhäuser/Imago