At which socket are the charging losses lower: domestic socket or wall box? ADAC and ÖAMTC investigated this question. And came to a clear conclusion.
Four test candidates
The Renault Zoe, the Tesla Model 3, the VW ID 3 and the Fiat 500e were available as test vehicles. The Renault Zoe made the biggest loss – at a household socket. With a charging capacity of 2.3 kW, 24.2 percent of the electricity was lost.
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Electric car: charging losses during AC charging
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Overall, the wall box performed significantly better, not least because the loading times were much shorter. The losses were between six and ten percent. The Fiat 500e proved to be the most efficient, with a loss of only six percent being determined.
The charging losses themselves occur at different points in the chain between charging station, charging cable and vehicle. The losses that occur in the charging cable between the charging station and the vehicle or in the high-voltage cables in the vehicle from the charging connection to the battery are relatively low and amount to a maximum of one percent. Likewise, the losses directly in the battery – when storing the electrical energy in the accumulators – are also negligible at one to two percent. Regardless of the load (AC or DC), the majority of the losses always occur when converting AC power from the grid to DC power from the battery. With on-board charging, the loss is at the expense of the e-car driver.
Charge right after the ride!
The clubs advise charging e-cars on wall boxes with 11 or 22 kW. And do this as soon as possible after a trip, when the battery is still at operating temperature. (Heb)
Source: Nachrichten
