Munich (ots) - If several electric cars are connected to the plug in an underground car park at the same time, there is a risk of overloading the power grid in the house - this myth persists in the discussion about electric mobility. A study by the ADAC now shows: Wallboxes with load management reliably divide the available power between several electric cars or, if necessary, suspend the charging process until enough power is available again. The club took a close look at four systems.
The examined systems show the diversity of the solutions offered on the market. The maximum number of possible charging points ranges from six (ABL) to theoretically unlimited (TMH). ABL, KEBA and Webasto only integrate wallboxes of the same type; with The Mobility House (TMH) system, wallboxes from different manufacturers can be integrated into the load management system. All systems were loaned to the ADAC by “The Mobility House”.
The load management systems work reliably, but there is some room for improvement in terms of intuitive operation. Information about which vehicle is currently receiving how much electricity would be helpful for the user. A graphic explanation of the LED charge status display on the wallbox can only be found at ABL - at KEBA there are informational texts in a display. Otherwise you have to remember the meaning of the different flashing light emitting diodes or - even more impractical - have the operating instructions ready in the underground car park.
In the event of a charging error in the car or a power failure, the systems examined in most cases restarted on their own after the fault had been rectified and continued the charging process - this was not always the case with the Webasto system. In view of the costs of wallboxes, manufacturers should also think about theft protection. Only the cheapest ABL product has an - albeit simple - anti-theft device.
For the selection of the appropriate load management system and the installation, configuration and commissioning of the wallboxes, consumers should choose specialist companies who already have experience with this quite complex topic.
The ADAC sees the manufacturers' duty to make wallboxes as intuitive as possible in terms of configuration and operation. This includes that the wallbox manufacturers agree on uniform flashing codes and colors for the charge status and error messages. The car manufacturers are also challenged and should generally show important information during the charging process such as charging power, battery charge level in percent and expected charging time in the vehicle display.
Detailed information is available at the following link: https://www.adac.de/wallbox-lastmanagement
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Posted by: ADAC
The text is a press release from ADAC. The text was not edited or changed by our editorial team.