Volkswagen is the most recent automaker to experiment with bi-directional charging. The automaker introduced final week that it is testing a DC wallbox that permits electrical automobiles to discharge energy again into the grid.

The wallbox can cost automobiles at as much as 22 kilowatts, VW mentioned in a press launch. It additionally permits automobiles to function energy-storage items for properties, or as battery buffers for the utility grid, the automaker famous.

VW is testing the {hardware} at factories, in Wolfsburg, Braunschweig, Hannover, Salzgitter, and Kassel, Germany. The automaker mentioned it is testing 20 charging stations between the 5 websites below the pilot program.

Bi-directional charging has been mentioned extensively, each as a means for electrical automobiles to function a backup energy supply for properties, and as a option to combine automobiles with the grid.

Volkswagen bi-directional charging pilot program

Volkswagen bi-directional charging pilot program

An Audi mission revealed earlier this summer season prompt that bi-directional charging functionality might use automobiles to help balance the grid throughout surprising demand surges.

The Wallbox Quasar, revealed earlier this yr, is the primary product to be made accessible in the USA and appropriate with bi-directional charging tech—though it is strictly for the CHAdeMO commonplace for now, not the extra prolific Mixed Charging Customary (CCS) utilized by VW.

A California study (additionally from earlier this yr) prompt how “vehicle-to-grid” or “V2G” expertise would possibly assist stabilize the grid in return for a reduction on utility payments for collaborating EV homeowners.

Not all charging needs to be DC to be bi-directional-capable, however it introduces a brand new set of {hardware} challenges. Earlier this fall Lucid Motors mentioned it can have “one of many first AC charging stations with bi-directional charging ever provided.” The Lucid Air electrical automobile will supply built-in bi-directional charging functionality from the beginning.